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Author SHA1 Message Date
beard%netscape.com
d30ae9fd55 commented out code that sets prototype of JavaAdapter instance, which broke calls to Java methods, toString(), etc.
git-svn-id: svn://10.0.0.236/branches/ClassGen_BRANCH@48180 18797224-902f-48f8-a5cc-f745e15eee43
1999-09-18 07:55:31 +00:00
norris%netscape.com
14b0e9035d Avoid throwing exception for NervousText.
git-svn-id: svn://10.0.0.236/branches/ClassGen_BRANCH@48005 18797224-902f-48f8-a5cc-f745e15eee43
1999-09-17 20:18:27 +00:00
beard%netscape.com
0e53f7d205 copy all of the arguments, instead of 1..(args.length-1)
git-svn-id: svn://10.0.0.236/branches/ClassGen_BRANCH@47891 18797224-902f-48f8-a5cc-f745e15eee43
1999-09-17 01:06:22 +00:00
norris%netscape.com
b6c0881d76 Changes for the NervousText applet example.
git-svn-id: svn://10.0.0.236/branches/ClassGen_BRANCH@46577 18797224-902f-48f8-a5cc-f745e15eee43
1999-09-09 17:57:58 +00:00
(no author)
7144ca2ee4 This commit was manufactured by cvs2svn to create branch 'ClassGen_BRANCH'.
git-svn-id: svn://10.0.0.236/branches/ClassGen_BRANCH@44416 18797224-902f-48f8-a5cc-f745e15eee43
1999-08-25 01:05:43 +00:00
308 changed files with 51374 additions and 65710 deletions

198
mozilla/js/rhino/Makefile Normal file
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@@ -0,0 +1,198 @@
#! gmake
# The contents of this file are subject to the Netscape Public License
# Version 1.0 (the "NPL"); you may not use this file except in
# compliance with the NPL. You may obtain a copy of the NPL at
# http://www.mozilla.org/NPL/
#
# Software distributed under the NPL is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
# for the specific language governing rights and limitations under the
# NPL.
#
# The Initial Developer of this code under the NPL is Netscape
# Communications Corporation. Portions created by Netscape are
# Copyright (C) 1999 Netscape Communications Corporation. All Rights
# Reserved.
#
# Makefile for javascript in java.
#
# This makefile is intended for packaging releases, and probably isn't
# suitable for production use - it doesn't attempt to do understand
# java dependencies beyond the package level.
#
# The makefiles for the subdirectories included in this package are
# intended to be called by this makefile with the proper CLASSDIR,
# PATH_PREFIX etc. variables. Makefiles in subdirectories are
# actually executed in the toplevel directory, with the PATH_PREFIX
# variable set to the subdirectory where the makefile is located.
#
# Initial version courtesy Mike Ang.
# Next version by Mike McCabe
# Don't include SHELL define (per GNU manual recommendation) because it
# breaks WinNT (with GNU make) builds.
# SHELL = /bin/sh
# Some things we might want to tweek.
CLASSDIR = classes
PACKAGE_NAME = org.mozilla.javascript
PACKAGE_PATH = org/mozilla/javascript
# jar filenames and the directories that build them.
JS_JAR = js.jar
JS_DIR = $(PACKAGE_PATH)
JSTOOLS_JAR = jstools.jar
JSTOOLS_DIR = $(PACKAGE_PATH)/tools
JARS = $(JS_JAR) $(JSTOOLS_JAR)
# It's not polite to store toplevel files in a tarball or zip files.
# What is the name of the toplevel directory to store files in?
# XXX we should probably add versioning to this.
DIST_DIR = jsjava
# XXX test this with sj
JAVAC = javac
# We don't define JFLAGS but we do export it to child
# builds in case it's defined by the environment.
# To build optimized (with javac) say 'make JFLAGS=-O'
GZIP = gzip
ZIP = zip
UNZIP = unzip
# Shouldn't need to change anything below here.
# For Windows NT builds (under GNU make).
ifeq ($(OS_TARGET), WINNT)
CLASSPATHSEP = '\\;'
else
CLASSPATHSEP = :
endif
# Make compatibility - use these instead of gmake 'export VARIABLE'
EXPORTS = CLASSDIR=$(CLASSDIR) JAVAC=$(JAVAC) JFLAGS=$(JFLAGS) SHELL=$(SHELL) \
PACKAGE_PATH=$(PACKAGE_PATH) PACKAGE_NAME=$(PACKAGE_NAME)
helpmessage : FORCE
@echo 'Targets include:'
@echo '\tall - make jars, examples'
@echo '\tjars - make js.jar, jstools.jar'
@echo '\tfast - quick-and-dirty "make jars", for development'
@echo '\texamples - build the .class files in the examples directory'
@echo '\tcheck - perform checks on the source.'
@echo '\tclean - remove intermediate files'
@echo '\tclobber - make clean, and remove .jar files'
@echo '\tzip - make a distribution .zip file'
@echo '\tzip-source - make a distribution .zip file, with source'
@echo '\ttar - make a distribution .tar.gz file'
@echo '\ttar-source - make a distribution .tar.gz, with source'
@echo
@echo 'Define OS_TARGET to "WINNT" to build on Windows NT with GNU make.'
@echo
all : jars examples
jars : $(JARS)
fast : fast_$(JS_JAR) $(JSTOOLS_JAR)
# Always call the sub-Makefile - which may decide that the jar is up to date.
$(JS_JAR) : FORCE
$(MAKE) -f $(JS_DIR)/Makefile JAR=$(@) $(EXPORTS) \
PATH_PREFIX=$(JS_DIR) \
CLASSPATH=.
fast_$(JS_JAR) :
$(MAKE) -f $(JS_DIR)/Makefile JAR=$(JS_JAR) $(EXPORTS) \
PATH_PREFIX=$(JS_DIR) \
CLASSPATH=. \
fast
$(JSTOOLS_JAR) : $(JS_JAR) FORCE
$(MAKE) -f $(JSTOOLS_DIR)/Makefile JAR=$(@) $(EXPORTS) \
PATH_PREFIX=$(JSTOOLS_DIR) \
CLASSPATH=./$(JS_JAR)$(CLASSPATHSEP).
examples : $(JS_JAR) FORCE
$(MAKE) -f examples/Makefile $(EXPORTS) \
PATH_PREFIX=examples \
CLASSPATH=./$(JS_JAR)
# We ask the subdirs to update their MANIFESTs
MANIFEST : FORCE
$(MAKE) -f $(JS_DIR)/Makefile JAR=$(JS_JAR) $(EXPORTS) \
PATH_PREFIX=$(JS_DIR) $(JS_DIR)/MANIFEST
$(MAKE) -f $(JSTOOLS_DIR)/Makefile JAR=$(JSTOOLS_JAR) $(EXPORTS) \
PATH_PREFIX=$(JSTOOLS_DIR) $(JSTOOLS_DIR)/MANIFEST
$(MAKE) -f examples/Makefile $(EXPORTS) \
PATH_PREFIX=examples examples/MANIFEST
# so ls below always has something to work on
touch MANIFEST
# examples/Makefile doesn't get included in the
# MANIFEST file, (which is used to create the non-source distribution) so
# we include it here.
cat examples/MANIFEST $(JS_DIR)/MANIFEST \
$(JSTOOLS_DIR)/MANIFEST \
| xargs ls MANIFEST README.html \
$(JARS) \
Makefile examples/Makefile \
> $(@)
# Make a MANIFEST file containing only the binaries and documentation.
# This could be abstracted further...
MANIFEST_binonly : MANIFEST
cat examples/MANIFEST \
| xargs ls $(JARS) README.html MANIFEST > MANIFEST
# A subroutine - not intended to be called from outside the makefile.
do_zip :
# Make sure we get a fresh one
- rm -r $(DIST_DIR)
- mkdir $(DIST_DIR)
- rm $(DIST_DIR).zip
cat MANIFEST | xargs $(ZIP) -0 -q $(DIST_DIR).zip
mv $(DIST_DIR).zip $(DIST_DIR)
cd $(DIST_DIR) ; \
$(UNZIP) -q $(DIST_DIR).zip ; \
rm $(DIST_DIR).zip
$(ZIP) -r -9 -q $(DIST_DIR).zip $(DIST_DIR)
- rm -r $(DIST_DIR)
zip : check jars examples MANIFEST_binonly do_zip
zip-source : check jars examples MANIFEST do_zip
# A subroutine - not intended to be called from outside the makefile.
do_tar :
- rm -r $(DIST_DIR)
- mkdir $(DIST_DIR)
- rm $(DIST_DIR).tar $(DIST_DIR).tar.gz
cat MANIFEST | xargs tar cf $(DIST_DIR).tar
mv $(DIST_DIR).tar $(DIST_DIR)
cd $(DIST_DIR) ; \
tar xf $(DIST_DIR).tar ; \
rm $(DIST_DIR).tar
tar cf $(DIST_DIR).tar $(DIST_DIR)
- rm -r $(DIST_DIR)
$(GZIP) -9 $(DIST_DIR).tar
tar: check jars examples MANIFEST_binonly do_tar
tar-source : check jars examples MANIFEST do_tar
# These commands just get passed to the respective sub-Makefiles.
clean clobber check:
$(MAKE) -f $(JS_DIR)/Makefile $(EXPORTS) JAR=$(JS_JAR) \
PATH_PREFIX=$(JS_DIR) $(@)
$(MAKE) -f $(JSTOOLS_DIR)/Makefile $(EXPORTS) JAR=$(JSTOOLS_JAR) \
PATH_PREFIX=$(JSTOOLS_DIR) $(@)
$(MAKE) -f examples/Makefile $(EXPORTS) PATH_PREFIX=examples $(@)
#emulate .PHONY
FORCE :

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@@ -1,37 +1,4 @@
<html>
<!--
- The contents of this file are subject to the Netscape Public
- License Version 1.1 (the "License"); you may not use this file
- except in compliance with the License. You may obtain a copy of
- the License at http://www.mozilla.org/NPL/
-
- Software distributed under the License is distributed on an "AS
- IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- implied. See the License for the specific language governing
- rights and limitations under the License.
-
- The Original Code is Rhino code, released
- May 6, 1999.
-
- The Initial Developer of the Original Code is Netscape
- Communications Corporation. Portions created by Netscape are
- Copyright (C) 1998-1999 Netscape Communications Corporation. All
- Rights Reserved.
-
- Contributor(s):
- Norris Boyd
-
- Alternatively, the contents of this file may be used under the
- terms of the GNU Public License (the "GPL"), in which case the
- provisions of the GPL are applicable instead of those above.
- If you wish to allow use of your version of this file only
- under the terms of the GPL and not to allow others to use your
- version of this file under the NPL, indicate your decision by
- deleting the provisions above and replace them with the notice
- and other provisions required by the GPL. If you do not delete
- the provisions above, a recipient may use your version of this
- file under either the NPL or the GPL.
-->
<body>
<h1>
<span CLASS=LXRSHORTDESC>
@@ -40,7 +7,7 @@ Rhino: JavaScript in Java<p>
</h1>
<span CLASS=LXRLONGDESC>
Rhino is an implementation of JavaScript in Java. Documentation can be found
<a href="http://www.mozilla.org/rhino/index.html">here</a>.
<a href="http://www.mozilla.org/js/rhino/rhino.html">here</a>.
</span>
</body>
</html>

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@@ -1,22 +0,0 @@
apiClasses=\
src/org/mozilla/javascript/ClassCache.java,\
src/org/mozilla/javascript/ClassDefinitionException.java,\
src/org/mozilla/javascript/ClassShutter.java,\
src/org/mozilla/javascript/Context.java,\
src/org/mozilla/javascript/ContextListener.java,\
src/org/mozilla/javascript/EcmaError.java,\
src/org/mozilla/javascript/ErrorReporter.java,\
src/org/mozilla/javascript/Function.java,\
src/org/mozilla/javascript/FunctionObject.java,\
src/org/mozilla/javascript/ImporterTopLevel.java,\
src/org/mozilla/javascript/JavaScriptException.java,\
src/org/mozilla/javascript/PropertyException.java,\
src/org/mozilla/javascript/Script.java,\
src/org/mozilla/javascript/Scriptable.java,\
src/org/mozilla/javascript/ScriptableObject.java,\
src/org/mozilla/javascript/SecurityController.java,\
src/org/mozilla/javascript/WrapFactory.java,\
src/org/mozilla/javascript/Wrapper.java,\
src/org/mozilla/javascript/Synchronizer.java,\
src/org/mozilla/javascript/serialize/ScriptableInputStream.java,\
src/org/mozilla/javascript/serialize/ScriptableOutputStream.java

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@@ -1 +0,0 @@
This version was built on @datestamp@.

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@@ -1,183 +0,0 @@
<?xml version="1.0" encoding="utf-8"?>
<!--
Build file for Rhino using Ant (see http://jakarta.apache.org/ant/index.html)
Requires Ant version 1.2 or later
-->
<project name="Rhino" default="help" basedir=".">
<target name="properties">
<property name="name" value="rhino"/>
<property name="Name" value="Rhino"/>
<property name="version" value="1_5R5pre"/>
<property name="rhino.jar" value="js.jar"/>
<property name="small-rhino.jar" value="smalljs.jar"/>
<property name="jar-compression" value="true"/>
<property name="debug" value="on"/>
<property name="build.dir" value="./build"/>
<property name="classes" value="${build.dir}/classes"/>
<property name="dist.name" value="rhino${version}"/>
<property name="dist.dir" value="${build.dir}/${dist.name}"/>
<property name="dist.src" value="${dist.dir}/src"/>
<property name="dist.toolsrc" value="${dist.dir}/toolsrc"/>
<property name="dist.examples" value="${dist.dir}/examples"/>
<property name="dist.docs" value="${dist.dir}/docs"/>
<property name="dist.apidocs" value="${dist.docs}/apidocs"/>
<property name="dist.file" value="rhino${version}.zip"/>
<property name="dist.source-only-zip" value="rhino${version}-sources.zip"/>
<property file="apiClasses.properties"/>
<property name="docsrc.dir" value="docs"/>
<property name="dist.docsrc.dir" value="src/docs"/>
</target>
<target name="init" depends="properties">
<mkdir dir="${build.dir}"/>
<mkdir dir="${classes}"/>
<mkdir dir="${dist.dir}"/>
<mkdir dir="${dist.src}"/>
<mkdir dir="${dist.toolsrc}"/>
<mkdir dir="${dist.examples}"/>
<mkdir dir="${dist.docs}"/>
<mkdir dir="${dist.apidocs}"/>
</target>
<target name="compile" depends="init">
<ant dir="src" target="compile"/>
<ant dir="toolsrc" target="compile"/>
</target>
<target name="copy-source" depends="init">
<ant dir="src" target="copy-source"/>
<ant dir="toolsrc" target="copy-source"/>
<copy todir="${dist.dir}" file="build.xml"/>
<copy todir="${dist.dir}" file="apiClasses.properties"/>
</target>
<target name="jar" depends="compile">
<jar jarfile="${dist.dir}/${rhino.jar}"
basedir="${classes}"
manifest="src/manifest"
compress="${jar-compression}"
/>
</target>
<target name="smalljar" depends="compile">
<jar basedir="${classes}" destfile="${dist.dir}/${small-rhino.jar}"
compress="${jar-compression}">
<include name="org/mozilla/javascript/*.class"/>
<exclude name="org/mozilla/javascript/ClassNameHelper*.class"/>
<exclude name="org/mozilla/javascript/ClassRepository*.class"/>
<exclude name="org/mozilla/javascript/JavaAdapter*.class"/>
<exclude name="org/mozilla/javascript/NotAFunctionException*.class"/>
<exclude name="org/mozilla/javascript/Token.class"/>
<include name="org/mozilla/javascript/debug/*.class"/>
<include name="org/mozilla/javascript/resources/*.properties"/>
<include name="org/mozilla/javascript/regexp/*.class"
unless="no-regexp"/>
</jar>
</target>
<target name="copy-examples" depends="init">
<copy todir="${dist.examples}">
<fileset dir="examples" includes="*.java,*.js,*.html" />
</copy>
</target>
<target name="copy-misc" depends="init">
<tstamp/>
<filter token="datestamp" value="${TODAY}"/>
<copy todir="${dist.dir}" filtering="yes">
<fileset dir=".">
<patternset>
<include name="build-date"/>
</patternset>
</fileset>
</copy>
</target>
<target name="copy-all" depends="copy-source,copy-examples,copy-misc">
</target>
<target name="copy-docs" depends="init">
<echo message="copy from ${docsrc.dir}"/>
<copy todir="${dist.docs}">
<fileset dir="${docsrc.dir}"
includes="**/*.html,**/*.jpg,**/*.gif" />
</copy>
</target>
<target name="javadoc" depends="compile,copy-docs">
<javadoc sourcefiles="${apiClasses}"
sourcepath="src"
destdir="${dist.apidocs}"
overview="${dist.docs}/api.html"
version="true"
author="true"
public="true"
windowtitle="${Name}" />
</target>
<target name="dist" depends="deepclean,jar,copy-all,javadoc">
<delete file="${dist.file}" />
<zip zipfile="${dist.file}"
basedir="${build.dir}"
includes="**"
excludes="classes/**" />
</target>
<target name="source-zip" depends="copy-source">
<delete file="${dist.source-only-zip}" />
<zip zipfile="${dist.source-only-zip}" basedir="${build.dir}"
includes="${dist.name}/src/**,${dist.name}/toolsrc/**,${dist.name}/build.xml,${dist.name}/apiClasses.properties"/>
</target>
<target name="clean" depends="properties">
<delete quiet="true" file="${dist.dir}/${rhino.jar}"/>
<delete quiet="true" file="${dist.dir}/${small-rhino.jar}"/>
<delete quiet="true" dir="${classes}"/>
</target>
<target name="deepclean" depends="properties">
<delete quiet="true" dir="${build.dir}"/>
<delete quiet="true" file="${dist.file}"/>
<delete quiet="true" file="${dist.source-only-zip}"/>
</target>
<target name="help" depends="properties">
<echo>The following targets are available with this build file:
clean remove all compiled classes and copied property files
compile compile all classes and copy all property files
into ${classes} directory
deepclean remove all generated files and directories
dist create ${dist.file} with full Rhino distribution
help print this help
jar create ${rhino.jar} in ${dist.dir}
smalljar create ${small-rhino.jar} in ${dist.dir} with
minimalist set of Rhino classes. See footprint.html
from the doc directory for details.
javadoc generate generate Rhino API documentation
in ${dist.apidocs}
source-zip create ${dist.source-only-zip} with all Rhino
source files necessary to recreate ${rhino.jar}
</echo>
</target>
</project>

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@@ -1,161 +0,0 @@
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
<META NAME="Generator" CONTENT="Microsoft Word 97">
<TITLE>1</TITLE>
</HEAD>
<BODY>
<OL>
<B><FONT FACE="Arial" SIZE=5 COLOR="#000080"><LI>Using the Rhino JavaScript Debugger</LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The Mozilla Rhino JavaScript engine includes a source-level debugger for debugging JavaScript scripts. The debugger is itself a Java program which you may run as</P>
</FONT><FONT FACE="Arial" SIZE=2><P ALIGN="JUSTIFY">java org.mozilla.javascript.tools.debugger.JSDebugger [options] [filename.js] [script-arguments]</P>
</FONT><FONT SIZE=2><P ALIGN="JUSTIFY">where the options are the same as the shell.</P>
<OL>
<LI><A NAME="_Toc502165108"></FONT><B><FONT FACE="Arial" SIZE=4 COLOR="#000080">Features</A></LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The Rhino JavaScript Debugger can debug scripts running in multiple threads and provides facilities to set and clear breakpoints, control execution, view variables, and evaluate arbitrary JavaScript code in the current scope of an executing script.</P>
<OL>
<LI><A NAME="_Toc502165109"></FONT><B><FONT FACE="Arial" COLOR="#000080">Console Window</A></LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The debugger redirects the </FONT><FONT FACE="Arial" SIZE=2>System.out</FONT><FONT SIZE=2>, </FONT><FONT FACE="Arial" SIZE=2>System.in</FONT><FONT SIZE=2>, and </FONT><FONT FACE="Arial" SIZE=2>System.err</FONT><FONT SIZE=2> streams to an internal JavaScript console window which provides an editable command line for you to enter JavaScript code and view system output. The console window maintains a history of the commands you have entered. You may move backward and forward through the history list by pressing the Up/Down arrow keys on the keyboard.</P>
<LI><A NAME="_Toc502165110"></FONT><B><FONT FACE="Arial" COLOR="#000080">Opening Scripts</A></LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">You may select the <B><I>File-&gt;Open</B></I> menu item on the menu bar to load JavaScript scripts contained in files. This action will display a file-selection dialog box prompting you for the location of a script to load. The selected file will be compiled and displayed in a new window.</P>
</FONT><B><FONT FACE="Arial" COLOR="#000080"><LI>Running Scripts</LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">You may select the <B><I>File-&gt;Run</B></I> menu item on the menu bar to execute JavaScript scripts contained in files. This action will display a file-selection dialog box prompting you for the location of a script to execute. The loaded script will be run in a new thread and control will be given to the debugger on its first instruction.</P>
<LI><A NAME="_Toc502165111"></FONT><B><FONT FACE="Arial" COLOR="#000080">Controlling Execution</A></LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The debugger provides the following facilities for you to control the execution of scripts you are debugging:</P>
<OL>
</FONT><B><FONT FACE="Arial" COLOR="#000080"><LI>Step Into</LI></OL>
</OL>
</OL>
</OL>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">To single step entering any function calls, you may do any of the following:</P>
<UL>
<P ALIGN="JUSTIFY"><LI>Select the <B><I>Debug-&gt;Step Into </B></I>menu item on the menu bar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the <B><I>Step Into</B></I> button on the toolbar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the F11 key on the keyboard</LI></P></UL>
<P ALIGN="JUSTIFY">Execution will resume. If the current line in the script contains a function call control will return to the debugger upon entry into the function. Otherwise control will return to the debugger at the next line in the current function.</P>
<OL>
<OL>
<OL>
<OL>
</FONT><B><FONT FACE="Arial" COLOR="#000080"><LI>Step Over</LI></OL>
</OL>
</OL>
</OL>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">To single step to the next line in the current function, you may do any of the following:</P>
<UL>
<P ALIGN="JUSTIFY"><LI>Select the <B><I>Debug-&gt;Step Over</B></I> menu item on the menu bar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the <B><I>Step Over</B></I> button on the toolbar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the F7 key on the keyboard</LI></P></UL>
<P ALIGN="JUSTIFY">Execution will resume but control will return to the debugger at the next line in the current function or top-level script.</P>
<OL>
<OL>
<OL>
<OL>
</FONT><B><FONT FACE="Arial" COLOR="#000080"><LI>Step Out</LI></OL>
</OL>
</OL>
</OL>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">To continue execution until the current function returns you may do any of the following:</P>
<UL>
<P ALIGN="JUSTIFY"><LI>Select the <B><I>Debug-&gt;Step Out</B></I> menu item on the menu bar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the <B><I>Step Out</B></I> button on the toolbar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the F8 key on the keyboard</LI></P></UL>
<P ALIGN="JUSTIFY">Execution will resume until the current function returns or a breakpoint is hit.</P>
<OL>
<OL>
<OL>
<OL>
</FONT><B><FONT FACE="Arial" COLOR="#000080"><LI>Go</LI></OL>
</OL>
</OL>
</OL>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">To resume execution of a script you may do any of the following:</P>
<UL>
<P ALIGN="JUSTIFY"><LI>Select the <B><I>Debug-&gt;Go</B></I> menu item on the menu bar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the <B><I>Go</B></I> button on the toolbar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the F5 key on the keyboard</LI></P></UL>
<P ALIGN="JUSTIFY">Execution will resume until a breakpoint is hit or the script completes.</P>
<P ALIGN="JUSTIFY">&nbsp;</P>
<OL>
<OL>
<OL>
<OL>
</FONT><B><FONT FACE="Arial" COLOR="#000080"><LI>Break</LI></OL>
</OL>
</OL>
</OL>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">To stop all running scripts and give control to the debugger you may do any of the following:</P>
<UL>
<P ALIGN="JUSTIFY"><LI>Select the <B><I>Debug-&gt;Break</B></I> menu item on the menu bar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the <B><I>Break</B></I> button on the toolbar</LI></P>
<P ALIGN="JUSTIFY"><LI>Press the Pause/Break key on the keyboard</LI></P></UL>
<OL>
<OL>
<OL>
<LI><A NAME="_Toc502165112"></FONT><B><FONT FACE="Arial" COLOR="#000080">Moving Up and Down the Stack</A></LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The lower-left (dockable) pane in the debugger main window contains a combo-box labeled &quot;Context:&quot; which displays the current stack of the executing script. You may move up and down the stack by selecting an entry in the combo-box. When you select a stack frame the variables and watch windows are updated to reflect the names and values of the variables visible at that scope.</P>
<LI><A NAME="_Toc502165113"></FONT><B><FONT FACE="Arial" COLOR="#000080">Setting and Clearing Breakpoints</A></LI></OL>
</OL>
</OL>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The main desktop of the debugger contains file windows which display the contents of each script you are debugging. You may set a breakpoint in a script by doing one of the following:</P>
<UL>
<P ALIGN="JUSTIFY"><LI>Place the cursor on the line at which you want to set a breakpoint and right-click with the mouse. This action will display a pop-up menu. Select the <B><I>Set Breakpoint</B></I> menu item. </LI></P>
<P ALIGN="JUSTIFY"><LI>Simply single-click on the line number of the line at which you want to set a breakpoint.</LI></P></UL>
<P ALIGN="JUSTIFY">If the selected line contains executable code a red dot will appear next to the line number and a breakpoint will be set at that location.</P>
<P ALIGN="JUSTIFY">You may set clear breakpoint in a script by doing one of the following:</P>
<UL>
<P ALIGN="JUSTIFY"><LI>Place the cursor on the line at which you want to clear a breakpoint and right-click with the mouse. This action will display a pop-up menu. Select the <B><I>Clear Breakpoint</B></I> menu item. </LI></P>
<P ALIGN="JUSTIFY"><LI>Simply single-click on the red dot or the line number of the line at which you want to clear a breakpoint.</LI></P></UL>
<P ALIGN="JUSTIFY">The red dot will disappear and the breakpoint at that location will be cleared.</P>
<OL>
<OL>
<OL>
<LI><A NAME="_Toc502165114"></FONT><B><FONT FACE="Arial" COLOR="#000080">Viewing Variables</A></LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The lower-left (dockable) pane in the debugger main window contains a tab-pane with two tabs, labeled &quot;this&quot; and &quot;Locals&quot;. Each pane contains a tree-table which displays the properties of the current object and currently visible local variables, respectively. </P>
<OL>
</FONT><B><FONT FACE="Arial" COLOR="#000080"><LI>This</LI></OL>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The properties of the current object are displayed in the <B><I>this</B></I> table. If a property is itself a JavaScript object the property may be expanded to show its sub-properties. The <B><I>this</B></I> table is updated each time control returns to the debugger or when you change the stack location in the <B><I>Context:</B></I> window.</P>
<LI><A NAME="_Toc502165115"></FONT><B><FONT FACE="Arial" COLOR="#000080">Locals</A></LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The local variables of the current function are displayed in the <B><I>Locals</B></I> table. If a variable is itself a JavaScript object the variable may be expanded to show its sub-properties. The <B><I>Locals</B></I> table is updated each time control returns to the debugger or when you change the stack location in the <B><I>Context:</B></I> window</P>
<LI><A NAME="_Toc502165116"></FONT><B><FONT FACE="Arial" COLOR="#000080">Watch Window</A></LI>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">You may enter arbitrary JavaScript expressions in the <B><I>Watch:</B></I> table located in the lower-right (dockable) pane in the debugger main window. The expressions you enter are reevaluated in the current scope and their current values displayed each time control returns to the debugger or when you change the stack location in the <B><I>Context:</B></I> window.</P>
<LI><A NAME="_Toc502165117"></FONT><B><FONT FACE="Arial" COLOR="#000080">Evaluation Window</A></LI></OL>
</OL>
</OL>
</B></FONT><FONT SIZE=2><P ALIGN="JUSTIFY">The <B><I>Evaluate</B></I> pane located in the lower-right (dockable) pane in the debugger main window contains an editable command line where you may enter arbitrary JavaScript code. The code is evaluated in the context of the current stack frame. The window maintains a history of the commands you have entered. You may move backward or forward through the history by pressing the Up/Down arrow keys on the keyboard. </P>
</FONT></BODY>
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.7 [en] (WinNT; U) [Netscape]">
<title>JavaScript API</title>
</head>
<body bgcolor="#FFFFFF">
<h1 align="center">
Rhino API Reference.</h1>
<h4>
The Control API</h4>
These APIs provide methods for controlling the actions of JavaScript in
a host environment.
<ul>
<li>
<a href="org/mozilla/javascript/Context.html">Context</a> - Represents
the runtime context of an executing script. Has methods to associate the
JavaScript evaluation engine with a Java thread, set attributes of the
engine, and compile and evaluate scripts.</li>
<li>
<a href="org/mozilla/javascript/ContextListener.html">ContextListener</a>
- Allows embeddings to be notified of the creation, entering, exiting,
and releasing of Contexts. </li>
<li>
<a href="org/mozilla/javascript/Script.html">Script</a> - The result of
compiling a JavaScript script. Also encapsulates script execution.</li>
<li>
<a href="org/mozilla/javascript/ErrorReporter.html">ErrorReporter</a> -
This interface can be implemented to control the actions the JavaScript
engine takes when it encounters errors.</li>
<li>
<a href="org/mozilla/javascript/SecurityController.html">SecurityController</a>
- Optional support routines that must be provided by embeddings implementing
security controls on scripts.</li>
<li>
<a href="org/mozilla/javascript/ClassShutter.html">ClassShutter</a>
- Embeddings that wish to filter Java classes that are visible to scripts
through the LiveConnect, should implement this interface.</li>
<li>
<a href="org/mozilla/javascript/Wrapper.html">Wrapper</a> - Interface implemented
by objects wrapping other objects. Provides a method for recovering the
wrapped value.</li>
<li>
<a href="org/mozilla/javascript/WrapHandler.html">WrapHandler</a> - Interface
embedders can implement in order to control the way Java objects are wrapped
for use by JavaScript.</li>
<li>
<a href="org/mozilla/javascript/ClassOutput.html">ClassOutput</a> - Interface
embedders can implement in order to control the placement of generated
class bytecodes.</li>
<li>
<a href="org/mozilla/javascript/serialize/ScriptableOutputStream.html">ScriptableOutputStream</a> - This stream can be used to serialize JavaScript objects and functions.
</li>
<li>
<a href="org/mozilla/javascript/serialize/ScriptableInputStream.html">ScriptableInputStream</a> - This stream can be used to deserialize JavaScript objects and functions.
</li>
</ul>
<h4>
The Host Object API</h4>
These APIs provide support for adding objects specific to a particular
embedding of JavaScript in a host environment. Note that if you just want
to script existing Java classes, you should just use <a href="http://developer.netscape.com/library/documentation/communicator/jsguide4/livecon.htm">LiveConnect</a>.
It is also helpful to understand some of the implementation of the <a href="runtime.html">runtime</a>.
<ul>
<li>
<a href="org/mozilla/javascript/Scriptable.html">Scriptable</a> - All JavaScript
objects must implement this interface. Provides methods to access properties
and attributes of those properties, as well as other services required
of JavaScript objects.</li>
<li>
<a href="org/mozilla/javascript/Function.html">Function</a> - All JavaScript
functions must implement this interface. Extends Scriptable, adding methods
to support invocation.</li>
<li>
<a href="org/mozilla/javascript/ScriptableObject.html">ScriptableObject</a>
- A default implementation of Scriptable that may be extended. Implements
property and attribute storage and lookup and other default JavaScript
object behavior.</li>
<li>
<a href="org/mozilla/javascript/FunctionObject.html">FunctionObject</a>
- An implementation of Function that allows Java methods and constructors
to be used as JavaScript function objects.</li>
<li>
<a href="org/mozilla/javascript/ImporterTopLevel.html">ImporterTopLevel</a>
- Allows embeddings to use the importClass and importPackage functions.</li>
</ul>
<h4>
Exceptions</h4>
These exceptions are thrown by JavaScript.
<ul>
<li>
<a href="org/mozilla/javascript/JavaScriptException.html">JavaScriptException</a>
- Thrown from within JavaScript by the JavaScript 'throw' statement, or
by LiveConnect calls from JavaScript into Java. Wraps a JavaScript value.</li>
<li>
<a href="org/mozilla/javascript/ClassDefinitionException.html">ClassDefinitionException</a>
- Thrown if errors are detected while attempting to define a host object
from a Java class.</li>
<li>
<a href="org/mozilla/javascript/PropertyException.html">PropertyException</a>
- Thrown if errors are detected while attempting to define a property of
a host object from a Java class or method, or if a property is not found.</li>
<li>
<a href="org/mozilla/javascript/NotAFunctionException.html">NotAFunctionException</a>
- Thrown when attempting to call an object that is not a function.</li>
<li>
<a href="org/mozilla/javascript/EvaluatorException.html">EvaluatorException</a>
- An exception thrown when an error is detected during the execution of
a script. The default error reporter will throw EvaluatorExceptions when
an error is encountered.</li>
</ul>
<hr WIDTH="100%">
<br><a href="overview-summary.html">back to top</a>
</body>
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (WinNT; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java, BSF, Apache">
<title>Rhino and BSF</title>
</head>
<body bgcolor="#FFFFFF">
<script src="owner.js"></script>
<center>
<h1>
Using Rhino with BSF and Apache</h1></center>
<script>document.write(owner());</script>
<br><script>
var d = new Date(document.lastModified);
document.write((d.getMonth()+1)+"/"+d.getDate()+"/"+d.getFullYear());
document.write('<br>');
</script>
<hr WIDTH="100%">
<br>The <a href="http://oss.software.ibm.com/developerworks/projects/bsf">Bean
Scripting Framework</a> (or BSF) was originally developed by IBM and now
published as open source. It provides a framework for using a number of
scripting languages with Java. Rhino is one of the supported languages.
<p>This framework has been embedded in a number of open source projects,
including the XSL processor <a href="http://xml.apache.org/xalan-j/index.html">Xalan</a>
and the XML/Java build tool <a href="http://ant.apache.org/">Ant</a>.
<p>You can download a version of <tt>bsf.jar</tt> from <a href="http://oss.software.ibm.com/developerworks/projects/bsf">http://oss.software.ibm.com/developerworks/projects/bsf</a>
that includes the <tt>com.ibm.bsf.engines.javascript.JavaScriptEngine</tt>
class. The current version is 2.2 release candidate at the time of this
writing. This version thus supports JavaScript through Rhino when used
with the <tt>js.jar</tt> file from either <tt>rhino15R1.zip</tt> or <tt>rhinoTip.zip</tt>.
<p>See <a href="http://xml.apache.org/xalan/extensions.html#ex-basic">Xalan-Java
Extensions</a> for more information on adding JavaScript to XSL and the
<a href="http://jakarta.apache.org/ant/jakarta-ant/docs/#script">Script
task</a> for using scripting in Ant build files.
<p><a href="index.html">back to top</a>
</body>
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<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="Author" content="Norris Boyd">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Change Log</title>
</head>
<body bgcolor="#ffffff">
<h1 align="center">
Change Log for Significant Rhino Changes</h1>
This is a log of significant changes since Rhino 1.5 Release 4.
<h3>Nothing significant yet!</h3>
<hr width="100%"><br>
<a href="index.html">back to top</a></h3>
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.7 [en] (WinNT; I) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java, Debugger">
<title>Rhino Debugger</title>
</head>
<body bgcolor="#FFFFFF">
<script src="owner.js">
</script>
<center>
<h1>
Rhino JavaScript Debugger</h1></center>
Christopher Oliver
<br><script>document.write(owner());</script>
<br>6/28/2001
<center>
<hr WIDTH="100%"></center>
The Rhino JavaScript debugger is a GUI that allows debugging of interpreted
JavaScript scripts run in Rhino. Note that this debugger <i>will not</i>
work with JavaScript scripts run in the mozilla browser since Rhino is
not the engine used in such environments.
<p><img SRC="jsdebug.jpg" height=460 width=600>
<p>Current limitations:
<ul>
<li>
Requires JDK 1.2 or greater</li>
<li>
Requires js.jar from rhinoTip.zip</li>
<li>
No breakpoint menu</li>
</ul>
<b><font face="Arial"><font color="#000080"><font size=+2>Using the Rhino
JavaScript Debugger</font></font></font></b>
<p><font size=-1>The Mozilla Rhino JavaScript engine includes a source-level
debugger for debugging JavaScript scripts. The debugger is itself a Java
program which you may run as</font>
<ol><font face="Arial"><font size=-1>java org.mozilla.javascript.tools.debugger.Main
[options] [filename.js] [script-arguments]</font></font></ol>
<font size=-1>where the options are the same as the shell.</font>
<p><font size=-1>The Rhino JavaScript Debugger can debug scripts running
in multiple threads and provides facilities to set and clear breakpoints,
control execution, view variables, and evaluate arbitrary JavaScript code
in the current scope of an executing script.</font>
<p><a NAME="_Toc502165109"></a><b><font face="Arial"><font color="#000080"><font size=-1>Console
Window</font></font></font></b>
<br><font size=-1>The debugger redirects the <font face="Arial">System.out</font>,
<font face="Arial">System.in</font>,
and <font face="Arial">System.err</font> streams to an internal JavaScript
console window which provides an editable command line for you to enter
JavaScript code and view system output. The console window maintains a
history of the commands you have entered. You may move backward and forward
through the history list by pressing the Up/Down arrow keys on the keyboard.</font>
<br><a NAME="_Toc502165110"></a><b><font face="Arial"><font color="#000080"><font size=-1>Opening
Scripts</font></font></font></b>
<br><font size=-1>You may select the <b><i>File->Open</i></b> menu item
on the menu bar to load JavaScript scripts contained in files. This action
will display a file-selection dialog box prompting you for the location
of a script to load. The selected file will be compiled and displayed in
a new window.</font>
<br><a NAME="_RunningScripts"></a><b><font face="Arial"><font color="#000080"><font size=-1>Running
Scripts</font></font></font></b>
<br><font size=-1>You may select the <b><i>File->Run</i></b> menu item
on the menu bar to execute JavaScript scripts contained in files. This
action will display a file-selection dialog box prompting you for the location
of a script to execute. The loaded script will be run in a new thread and
control will be given to the debugger on its first instruction.</font>
<p><a NAME="_Toc502165111"></a><b><font face="Arial"><font color="#000080"><font size=+1>Controlling
Execution</font></font></font></b>
<br><font size=-1>The debugger provides the following facilities for you
to control the execution of scripts you are debugging:</font>
<p><b><font face="Arial"><font color="#000080">Step Into</font></font></b>
<br><font size=-1>To single step entering any function calls, you may do
any of the following:</font>
<ul>
<li>
<font size=-1>Select the <b><i>Debug->Step Into </i></b>menu item on the
menu bar</font></li>
<li>
<font size=-1>Press the <b><i>Step Into</i></b> button on the toolbar</font></li>
<li>
<font size=-1>Press the F11 key on the keyboard</font></li>
</ul>
<font size=-1>Execution will resume. If the current line in the script
contains a function call control will return to the debugger upon entry
into the function. Otherwise control will return to the debugger at the
next line in the current function.</font>
<p><b><font face="Arial"><font color="#000080">Step Over</font></font></b>
<br><font size=-1>To single step to the next line in the current function,
you may do any of the following:</font>
<ul>
<li>
<font size=-1>Select the <b><i>Debug->Step Over</i></b> menu item on the
menu bar</font></li>
<li>
<font size=-1>Press the <b><i>Step Over</i></b> button on the toolbar</font></li>
<li>
<font size=-1>Press the F7 key on the keyboard</font></li>
</ul>
<font size=-1>Execution will resume but control will return to the debugger
at the next line in the current function or top-level script.</font>
<p><b><font face="Arial"><font color="#000080">Step Out</font></font></b>
<br><font size=-1>To continue execution until the current function returns
you may do any of the following:</font>
<ul>
<li>
<font size=-1>Select the <b><i>Debug->Step Out</i></b> menu item on the
menu bar</font></li>
<li>
<font size=-1>Press the <b><i>Step Out</i></b> button on the toolbar</font></li>
<li>
<font size=-1>Press the F8 key on the keyboard</font></li>
</ul>
<font size=-1>Execution will resume until the current function returns
or a breakpoint is hit.</font>
<p><b><font face="Arial"><font color="#000080">Go</font></font></b>
<br><font size=-1>To resume execution of a script you may do any of the
following:</font>
<ul>
<li>
<font size=-1>Select the <b><i>Debug->Go</i></b> menu item on the menu
bar</font></li>
<li>
<font size=-1>Press the <b><i>Go</i></b> button on the toolbar</font></li>
<li>
<font size=-1>Press the F5 key on the keyboard</font></li>
</ul>
<font size=-1>Execution will resume until a breakpoint is hit or the script
completes.</font>
<p><b><font face="Arial"><font color="#000080">Break</font></font></b>
<br><font size=-1>To stop all running scripts and give control to the debugger
you may do any of the following:</font>
<ul>
<li>
<font size=-1>Select the <b><i>Debug->Break</i></b> menu item on the menu
bar</font></li>
<li>
<font size=-1>Press the <b><i>Break</i></b> button on the toolbar</font></li>
<li>
<font size=-1>Press the Pause/Break key on the keyboard</font></li>
</ul>
<a NAME="_RunningScripts"></a><b><font face="Arial"><font color="#000080"><font size=-1>Break
on Exceptions</font></font></font></b>
<br><font size=-1>To give control to the debugger whenever a JavaScript
is exception is thrown select the <b><i>Debug->Break on Exceptions</i></b>
checkbox from the menu bar.&nbsp; Whenever a JavaScript exception is thrown
by a script a message dialog will be displayed and control will be given
to the debugger at the location the exception is raised.</font>
<p><a NAME="_BreakOnFunctionEnter"></a><b><font face="Arial"><font color="#000080"><font size=-1>Break on Function Enter</font></font></font></b>
<br><font size=-1>Selecting <b><i>Debug->Break on Function Enter</i></b> will give control to the debugger whenever the execution is entered into a function or script.</font>
<p><a NAME="_BreakOnFunctionExit"></a><b><font face="Arial"><font color="#000080"><font size=-1>Break on Function Exit</font></font></font></b>
<br><font size=-1>Selecting <b><i>Debug->Break on Function Return</i></b> will give control to the debugger whenever the execution is about to return from a function or script.</font>
<p><a NAME="_Toc502165112"></a><b><font face="Arial"><font color="#000080">Moving
Up and Down the Stack</font></font></b>
<br><font size=-1>The lower-left (dockable) pane in the debugger main window
contains a combo-box labeled "Context:" which displays the current stack
of the executing script. You may move up and down the stack by selecting
an entry in the combo-box. When you select a stack frame the variables
and watch windows are updated to reflect the names and values of the variables
visible at that scope.</font>
<p><a NAME="_Toc502165113"></a><b><font face="Arial"><font color="#000080">Setting
and Clearing Breakpoints</font></font></b>
<br><font size=-1>The main desktop of the debugger contains file windows
which display the contents of each script you are debugging. You may set
a breakpoint in a script by doing one of the following:</font>
<ul>
<li>
<font size=-1>Place the cursor on the line at which you want to set a breakpoint
and right-click with the mouse. This action will display a pop-up menu.
Select the <b><i>Set Breakpoint</i></b> menu item.</font></li>
<li>
<font size=-1>Simply single-click on the line number of the line at which
you want to set a breakpoint.</font></li>
</ul>
<font size=-1>If the selected line contains executable code a red dot will
appear next to the line number and a breakpoint will be set at that location.</font>
<p><font size=-1>You may clear breakpoint in a script by doing one of the
following:</font>
<ul>
<li>
<font size=-1>Place the cursor on the line at which you want to clear a
breakpoint and right-click with the mouse. This action will display a pop-up
menu. Select the <b><i>Clear Breakpoint</i></b> menu item.</font></li>
<li>
<font size=-1>Simply single-click on the red dot or the line number of
the line at which you want to clear a breakpoint.</font></li>
</ul>
<font size=-1>The red dot will disappear and the breakpoint at that location
will be cleared.</font>
<p><a NAME="_Toc502165114"></a><b><font face="Arial"><font color="#000080"><font size=+1>Viewing
Variables</font></font></font></b>
<br><font size=-1>The lower-left (dockable) pane in the debugger main window
contains a tab-pane with two tabs, labeled "this" and "Locals". Each pane
contains a tree-table which displays the properties of the current object
and currently visible local variables, respectively.</font>
<p><b><font face="Arial"><font color="#000080">This</font></font></b>
<br><font size=-1>The properties of the current object are displayed in
the
<b><i>this</i></b> table. If a property is itself a JavaScript object
the property may be expanded to show its sub-properties. The <b><i>this</i></b>
table is updated each time control returns to the debugger or when you
change the stack location in the <b><i>Context:</i></b> window.</font>
<p><b><font face="Arial"><font color="#000080">Locals</font></font></b>
<br><font size=-1>The local variables of the current function are displayed
in the <b><i>Locals</i></b> table. If a variable is itself a JavaScript
object the variable may be expanded to show its sub-properties. The <b><i>Locals</i></b>
table is updated each time control returns to the debugger or when you
change the stack location in the <b><i>Context:</i></b> window</font>
<p><a NAME="_Toc502165116"></a><b><font face="Arial"><font color="#000080">Watch
Window</font></font></b>
<br><font size=-1>You may enter arbitrary JavaScript expressions in the
<b><i>Watch:</i></b>
table located in the lower-right (dockable) pane in the debugger main window.
The expressions you enter are re-evaluated in the current scope and their
current values displayed each time control returns to the debugger or when
you change the stack location in the <b><i>Context:</i></b> window.</font>
<p><a NAME="_Toc502165117"></a><b><font face="Arial"><font color="#000080">Evaluation
Window</font></font></b>
<br><font size=-1>The <b><i>Evaluate</i></b> pane located in the lower-right
(dockable) pane in the debugger main window contains an editable command
line where you may enter arbitrary JavaScript code. The code is evaluated
in the context of the current stack frame. The window maintains a history
of the commands you have entered. You may move backward or forward through
the history by pressing the Up/Down arrow keys on the keyboard.</font>
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<!DOCTYPE html PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Rhino Documentation</title>
</head>
<body bgcolor="#ffffff">
<center>
<h1> Rhino Documentation</h1>
</center>
<b><i><font size="+1">General</font></i></b>
<table width="100%">
<tbody>
<tr>
<td><a href="overview.html">Overview</a>
</td>
<td>An overview of the JavaScript language and of Rhino.</td>
</tr>
<tr>
<td><a href="limits.html">Requirements and Limitations</a>
</td>
<td>What you must have to run Rhino; what Rhino cannot do.</td>
</tr>
<tr>
<td><a href="rhino15R4.html">What's new in 1.5R4</a>
</td>
<td>Changes since 1.5R3.</td>
</tr>
<tr>
<td><a href="debugger.html">Rhino Debugger</a>
</td>
<td>A debugger for debugging JavaScript running in Rhino.</td>
</tr>
<tr>
<td><a href="opt.html">Optimization</a>
</td>
<td>Details on the various optimization levels.</td>
</tr>
<tr>
<td><a href="http://sourceforge.net/projects/jscorba">JS/CORBA Adapter</a>
</td>
<td>Provides a mechanism for arbitrary JavaScript objects to interact
with each other transparently in a distributed JavaScript system using CORBA.</td>
</tr>
<tr>
<td><a href="bsf.html">Using Rhino with BSF and Apache</a>
</td>
<td>How to use Rhino with apps that support BSF.</td>
</tr>
<tr>
<td><a href="changes.html">Recent Changes</a>
</td>
<td>Describes recent changes to Rhino.</td>
</tr>
<tr>
<td><a href="faq.html">FAQ</a>
</td>
<td>Answers to frequently asked questions about Rhino.</td>
</tr>
<tr>
<td><a href="http://industry.java.sun.com/javaone/99/event/0,1768,629,00.html">
1999 JavaOne session on Rhino</a>
</td>
<td>A talk on Rhino with slides. Also see the <a href="javaone.html">followup</a>
.</td>
</tr>
<tr>
<td valign="Top"><a href="http://www.ociweb.com/jnb/archive/jnbMar2001.html">
Scripting Languages for Java</a>
<br>
</td>
<td valign="Top">An article comparing and contrasting Rhino and Jython.<br>
</td>
</tr>
</tbody>
</table>
<p><b><i><font size="+1">Writing Scripts</font></i></b>
<table width="100%">
<tbody>
<tr>
<td><a href="ScriptingJava.html">Scripting Java</a>
</td>
<td>How to use Rhino to script Java classes.</td>
</tr>
<tr>
<td><a href="scriptjava.html">Scripting Java</a>
</td>
<td>How to use Rhino to script Java classes (an older treatment).</td>
</tr>
<tr>
<td><a href="perf.html">Performance Hints</a>
</td>
<td>Some tips on writing faster JavaScript code.</td>
</tr>
<tr>
<td><a href="tools.html">Tools</a>
</td>
<td>Some tools for developing JavaScript scripts.</td>
</tr>
</tbody>
</table>
</p>
<p><b><i><font size="+1">Embedding Rhino</font></i></b>
<table width="100%">
<tbody>
<tr>
<td><a href="tutorial.html">Embedding tutorial</a>
</td>
<td>A short tutorial on how to embed Rhino into your application.</td>
</tr>
<tr>
<td><a href="apidocs/index.html">API javadoc Reference</a>
</td>
<td>An annotated outline of the programming interface to Rhino (tip only).</td>
</tr>
<tr>
<td><a href="scopes.html">Scopes and Contexts</a>
</td>
<td>Describes how to use scopes and contexts for the best performance
and flexibility, with an eye toward multithreaded environments.</td>
</tr>
<tr>
<td><a href="serialization.html">Serialization</a>
</td>
<td>How to serialize JavaScript objects and functions in Rhino.</td>
</tr>
<tr>
<td><a href="runtime.html">Runtime</a>
</td>
<td>A brief description of the JavaScript runtime.</td>
</tr>
<tr>
<td><a href="footprint.html">Small Footprint</a>
</td>
<td>Hints for those interested in small-footprint embeddings.</td>
</tr>
<tr>
<td><a href="examples.html">Examples</a>
</td>
<td>A set of examples showing how to control the JavaScript engine and
build JavaScript host objects.</td>
</tr>
<tr>
<td><font color="#000000"><a href="http://www.mozilla.org/js/tests/library.html">
Testing</a>
</font></td>
<td>How to run the JavaScript test suite.</td>
</tr>
</tbody>
</table>
</p>
<h3>
<hr width="100%"><a href="index.html">back to top</a>
</h3>
</body>
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<!DOCTYPE html PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="Author" content="Igor Bukanov">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Rhino Downloads</title>
</head>
<body>
<center><b><font size="+3">Rhino Downloads</font></b></center>
<p>Rhino is available for download both in source and compiled form. </p>
<h3> Binaries</h3>
You can download binaries (JAR files) from <a
href="ftp://ftp.mozilla.org/pub/mozilla.org/js/"> ftp://ftp.mozilla.org/pub/mozilla.org/js/</a>
. Rhino 1.5 Release 4.1 is the last qualified release. It is also possible
to download the latest rhino build that reflects newer features and bug
fixes, but has not been fully qualified. These zip files also include
the source.
<p>If you are looking for <tt>js.jar</tt> for XSLT or for IBM's Bean
Scripting Framework (BSF), download one of the zip files below and
unzip it. </p>
<ul>
<li> <a href="ftp://ftp.mozilla.org/pub/mozilla.org/js/rhino15R41.zip">Rhino 1.5R4.1.</a>
<ul>
<li> <i><font size="-1"><a href="rhino15R41.html">Description of changes from 1.5R4.1</a> </font></i>.</li>
</ul>
</li>
<li> <a href="ftp://ftp.mozilla.org/pub/mozilla.org/js/rhino15R4.zip">Rhino 1.5R4.</a>
<ul>
<li> <i><font size="-1"><a href="rhino15R4.html">Description of changes from 1.5R3</a> </font></i>.</li>
</ul>
</li>
<li><a href="ftp://ftp.mozilla.org/pub/mozilla.org/js/rhino15R3.zip">Rhino 1.5R3.</a>
<ul>
<li> <i><font size="-1"><a href="rhino15R3.html">Description of
changes from 1.5R2</a> </font></i>.</li>
</ul>
</li>
<li> <a
href="ftp://ftp.mozilla.org/pub/mozilla.org/js/older-packages/rhino15R2.zip">Rhino
1.5R2.</a>
<ul>
<li> <i><font size="-1"><a href="rhino15R2.html">Description of
changes from 1.5R1</a> </font></i>.</li>
</ul>
</li>
<li><a
href="ftp://ftp.mozilla.org/pub/mozilla.org/js/older-packages/rhino15R1.zip">Rhino
1.5R1.</a>
<ul>
<li> <i><font size="-1"><a href="rhino15R1.html">Description of
changes from 1.4R3</a> </font></i>.</li>
</ul>
</li>
<li> <a
href="ftp://ftp.mozilla.org/pub/mozilla.org/js/older-packages/rhino14R3.zip"> Rhino
1.4 Release 3</a> .</li>
<li> <a href="ftp://ftp.mozilla.org/pub/mozilla.org/js/rhinoLatest.zip">Latest
Rhino builds</a> .
<ul>
<li> <i><font size="-1"><a href="changes.html">Description of
changes from 1.5R4</a> </font></i>.</li>
</ul>
</li>
</ul>
<h3> Source</h3>
The source code for Rhino is available under <a
href="http://www.mozilla.org/NPL/"> NPL 1.1</a> . In addition to getting
the source from the zip files above, the source code for Rhino can be
found in the CVS tree at mozilla/js/rhino. See&nbsp; <a
href="http://www.mozilla.org/cvs.html">source code via cvs</a> for
details on how to set up CVS, define your CVSROOT, and login. Once
you've done that, just execute the command
<pre>&nbsp;&nbsp;&nbsp; cvs co mozilla/js/rhino</pre>
to get the tip source.
<p>The current tip can also be viewed using LXR at <a
href="http://lxr.mozilla.org/mozilla/source/js/rhino/">
http://lxr.mozilla.org/mozilla/source/js/rhino/</a> . </p>
<p> </p>
<hr width="100%"><a href="index.html">back to top</a> <br>
&nbsp; <br>
</body>
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 97">
<meta name="GENERATOR" content="Mozilla/4.7 [en] (WinNT; U) [Netscape]">
<title>Embedding Scripting Host in Business Applications</title>
</head>
<body link="#0000FF">
<b><font face="Arial"><font size=-1>Embedding
Scripting Host in Business Applications</font></font></b>
<p><b><font face="Arial"><font size=-1>Madhukumar Seshadri, <a href="http://www.cognizant.com)/">www.cognizant.com</a></font></font></b>
<br>&nbsp;
<br>&nbsp;
<p><font face="Arial"><font size=-1>With web browsers, continuing to rule
the human interface for applications, creating value by being ubiquitous,
few adoptions of rich technology thats getting brewed underneath, will
help designing business applications even though most of the current ones
are made with birds eye of the underlying technologies.</font></font>
<p><font face="Arial"><font size=-1>JavaScript is a scripting language
invented and developed by Netscape. The language was primarily designed
for creating lightweight programming for web browser extensions by exposing
the Document Object Model of an HTML page to the scripts. JavaScript is
becoming object oriented and getting adopted for server-side scripting.</font></font>
<p><font face="Arial"><font size=-1>JavaScript is also becoming a standard
in the scripting world as Netscape is working closely with ECMA (European
Computer Manufacturers Association) to make it as a standard scripting
language for the script world. The standards are published as ECMA Script.</font></font>
<p><font face="Arial"><font size=-1>JavaScript originally designed for
exposing the DOM (Document Object Model) standardized by World Wide Web
consortium (W3C), to help web page designers to control and manipulate
the pages dynamically. JavaScript engines were embedded in the browsers
and they execute those portions of the code embedded in the HTML pages.</font></font>
<p><font face="Arial"><font size=-1>In short, JavaScript engine embedded
in the browser allowed extensions or manipulations for DOM Object run time
for the HTML page by executing the scripts associated with them. In other
words, browser exposes its DOM object for the page to scripts for extensions
and dynamic manipulations of the same, using a language that the script
interpreter understands.</font></font>
<p><font face="Arial"><font size=-1>Can I do the same for my application
by exposing my custom business objects written in my middle-tier? Can I
allow user to my write JavaScript extensions for my objects and also be
host for executing those scripts?</font></font>
<p><font face="Arial"><font size=-1>JavaScript host runs times are available
as binaries written in major languages. Check out <a href="http://www.mozilla.org/js">www.mozilla.org/js</a>.
Spider Monkey and Rhino are open source JavaScripting engines available
from mozilla.</font></font>
<p><font face="Arial"><font size=-1>Microsoft implementation of ECMA Script
(ECMA Script is based on core JavaScript, created by Netscape) is called
JScript. Microsoft binaries of jscript engine can be downloaded from http://msdn.microsoft.com/scripting/.</font></font>
<p><font face="Arial"><font size=-1>This document doesnt explain the JavaScript
language in detail but explains how these scripting engines can be used
as host to expose business objects in the middle-tier and how the user
of these applications can extend it if needed using JavaScript.</font></font>
<p><font face="Arial"><font size=-1>The scripting engine Rhino (<a href="http://www.mozilla.org/js)">www.mozilla.org/rhino)</a>,
a javascript engine purely written in Java is one that I am going to use
for the testing the above.</font></font>
<p><font face="Arial"><font size=-1>Let us set some simple goals,</font></font>
<ul>
<li>
<font face="Arial"><font size=-1>Execute a plain JavaScript code and
use static Java object</font></font></li>
<li>
<font face="Arial"><font size=-1>Instantiate external objects (written
in Java) from the script and use them within the script</font></font></li>
</ul>
<br>&nbsp;
<br>&nbsp;
<p><font face="Arial"><font size=-1>Let us write a simple Javscript to
test the above set goals,</font></font>
<p><font face="Arial"><font size=-1><b>Fig 1</b> jshosttest.js</font></font>
<p><b><i><font face="Arial"><font size=-1>/* Test 1 */</font></font></i></b>
<br><b><i><font face="Arial"><font size=-1>/* Use a static Java Object
in the script */</font></font></i></b>
<p><font face="Arial"><font size=-1>function test1() {</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; var str;</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; str = '"Hello World";</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; return str;</font></font>
<br><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>var str = test1( );</font></font>
<br><font face="Arial"><font size=-1>//out is expected to be Java Object
exposed to the script scope</font></font>
<br><font face="Arial"><font size=-1>out.println ("JavaScript - Test 1
- " + str);</font></font>
<p><b><i><font face="Arial"><font size=-1>/* Test 2 */</font></font></i></b>
<p><b><i><font face="Arial"><font size=-1>/* Instantiate a Javaobject for
this scope and use it */</font></font></i></b>
<p><font face="Arial"><font size=-1>function test2(){</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; // create a Java
string buffer object from JavaScript and use its java instance</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; // This uses an
another Java object created for creating new objects within Java and</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; // brings the same
for JavaScript execution scope</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; // Refer _create.java
for more information</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; create.getInstance("java.lang.StringBuffer","buffer");</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; //JavaScript refers
the java object instance as buffer</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; out.println(buffer.toString());</font></font>
<br>&nbsp;&nbsp;&nbsp; <font face="Arial"><font size=-1>buffer.append("I
am a javaobject dynamically created and executed in JavaScript");</font></font>
<br>&nbsp;&nbsp;&nbsp; <font face="Arial"><font size=-1>return buffer.toString();</font></font>
<br><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>var str = test2();</font></font>
<br><font face="Arial"><font size=-1>out.println("From JavaScript - Test
2 " + str);</font></font>
<p><font face="Arial"><font size=-1>Let us write a simple Javahost Object
using the Rhino engine to execute the above script,</font></font>
<p><b><font face="Arial"><font size=-1>Fig 2.1 - JSHost.java</font></font></b>
<p><font face="Arial"><font size=-1>/**</font></font>
<br><font face="Arial"><font size=-1>* @author Madhukumar Seshadri</font></font>
<br><font face="Arial"><font size=-1>* @version</font></font>
<br><font face="Arial"><font size=-1>*/</font></font>
<p><font face="Arial"><font size=-1>import org.mozilla.javascript.*;</font></font>
<br><font face="Arial"><font size=-1>import java.io.*;</font></font>
<br><font face="Arial"><font size=-1>import java.lang.*;</font></font>
<br><i><font face="Arial"><font size=-1>// import com.xxx.xxx.*;</font></font></i>
<p><font face="Arial"><font size=-1>public class JSHost extends Object
{</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; /** Creates new
JSHost */</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; public JSHost()
{</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; }</font></font>
<p><i><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; /*** Executes
.js file ***/</font></font></i>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; public Object executeJS
(String jsfname){</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; //You can also
use evaluateReader</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; File fp = new File(jsfname);</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; String str_buff
=null;</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; try {</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
FileReader fr = new FileReader(jsfname);</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
int length = (int) fp.length();</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
char cbuff[] = new char[(char)length];</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
fr.read(cbuff);</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
str_buff = new String(cbuff);</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; } catch(Exception
e) {</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
e.printStackTrace();</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; }</font></font>
<p><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; //Execute the .js
file content</font></font>
<br><font face="Arial"><font size=-1>&nbsp;&nbsp;&nbsp; return executeJSSource(str_buff);</font></font>
<br><font face="Arial"><font size=-1>}</font></font>
<p><i><font face="Arial"><font size=-1>/*** Executes javascript source
***/</font></font></i>
<br><font face="Arial"><font size=-1>public Object executeJSSource (String
jsbuff){</font></font>
<br><font face="Arial"><font size=-1>Object any=null;</font></font>
<br><font face="Arial"><font size=-1>try{</font></font>
<br><i><font face="Arial"><font size=-1>//Enter the Context</font></font></i>
<br><font face="Arial"><font size=-1><i>// Refer </i><u><font color="#0000FF">http://www.mozilla.org/js/rhino/tutorial.html</font></u></font></font>
<br><font face="Arial"><font size=-1>Context context = Context.enter();</font></font>
<br><i><font face="Arial"><font size=-1>// Get the execution scope</font></font></i>
<br><font face="Arial"><font size=-1>Scriptable scope = context.initStandardObjects();</font></font>
<p><i><font face="Arial"><font size=-1>//----------- For Test 1 - Get System.out
in scope</font></font></i>
<br><font face="Arial"><font size=-1>//Scriptable jObj1 = Context.toObject(System.out,
scope);</font></font>
<br><font face="Arial"><font size=-1>scope.put("out", scope, jObj1);</font></font>
<p><i><font face="Arial"><font size=-1>//------------ For Test 2 - Instantiate
Create Object and get that in scope</font></font></i>
<br><i><font face="Arial"><font size=-1>//Allow JScript to create Java
Objects</font></font></i>
<br><i><font face="Arial"><font size=-1>//Bring the _create object to context</font></font></i>
<br><font face="Arial"><font size=-1>_create create = new _create( );</font></font>
<br><i><font face="Arial"><font size=-1>//Register this context and scope
to this create object instance</font></font></i>
<br><font face="Arial"><font size=-1>create.registerContext(context,scope);</font></font>
<br><font face="Arial"><font size=-1>//Scriptable jObj2 = Context.toObject(_create,
scope);</font></font>
<br><font face="Arial"><font size=-1>scope.put("create",scope,create);</font></font>
<br><i><font face="Arial"><font size=-1>//Evaluate (or execute js)</font></font></i>
<br><font face="Arial"><font size=-1><i>//Refer </i><u><font color="#0000FF">http://www.mozilla.org/js/rhino/tutorial.html</font></u></font></font>
<br><font face="Arial"><font size=-1>any = context.evaluateString(scope,
jsbuff, "", 1, null);</font></font>
<br><i><font face="Arial"><font size=-1>//Exit the Context</font></font></i>
<br><font face="Arial"><font size=-1>context.exit( );</font></font>
<br><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>catch ( JavaScriptException jse) {</font></font>
<br><font face="Arial"><font size=-1>jse.printStackTrace();</font></font>
<br><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>return any;</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<br>&nbsp;
<br>&nbsp;
<p><font face="Arial"><font size=-1>Let us write a class for creating new
Java objects and bringing them to this script execution scope,</font></font>
<p><b><font face="Arial"><font size=-1>Fig 2.2 _create.java</font></font></b>
<p><i><font face="Arial"><font size=-1>/**</font></font></i>
<p><i><font face="Arial"><font size=-1>* @author Madhukumar</font></font></i>
<p><i><font face="Arial"><font size=-1>*/</font></font></i>
<p><font face="Arial"><font size=-1>import java.lang.Class;</font></font>
<p><font face="Arial"><font size=-1>import org.mozilla.javascript.*;</font></font>
<p><font face="Arial"><font size=-1>public class _create extends Object
{</font></font>
<p><font face="Arial"><font size=-1>static Context ptr = null;</font></font>
<p><font face="Arial"><font size=-1>static Scriptable scope =null;</font></font>
<p><font face="Arial"><font size=-1>public _create () { }</font></font>
<p><font face="Arial"><font size=-1>public void registerContext(Context
cptr, Scriptable sc){</font></font>
<p><font face="Arial"><font size=-1>ptr = cptr;</font></font>
<p><font face="Arial"><font size=-1>scope = sc;</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>public void getInstance(String classname,String
jsclassname) {</font></font>
<p><font face="Arial"><font size=-1>Object any=null;</font></font>
<p><font face="Arial"><font size=-1>try {</font></font>
<p><font face="Arial"><font size=-1>Class thisclass = Class.forName(classname);</font></font>
<p><font face="Arial"><font size=-1>any = thisclass.newInstance();</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>catch(Exception e){</font></font>
<p><font face="Arial"><font size=-1>e.printStackTrace();</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>if( ptr != null) {</font></font>
<p><font face="Arial"><font size=-1>if (scope !=null) {</font></font>
<p><i><font face="Arial"><font size=-1>//register created object for this
execution scope</font></font></i>
<p><font face="Arial"><font size=-1>scope.put(jsclassname,scope,any);</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<br>&nbsp;
<br>&nbsp;
<p><font face="Arial"><font size=-1>It is time to test the code, so let
us write a small object that will use the JSHost object,</font></font>
<p><b><font face="Arial"><font size=-1>Fig 3 - JSHosttest.java</font></font></b>
<p><font face="Arial"><font size=-1>/**</font></font>
<p><font face="Arial"><font size=-1>* @author Madhukumar</font></font>
<p><font face="Arial"><font size=-1>* @version</font></font>
<p><font face="Arial"><font size=-1>*/</font></font>
<p><font face="Arial"><font size=-1>public class JSHosttest extends Object
{</font></font>
<p><font face="Arial"><font size=-1>/** Creates new JSHostTest*/</font></font>
<p><font face="Arial"><font size=-1>public JSHosttest() {</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>public static void main (String args[]){</font></font>
<p><font face="Arial"><font size=-1>if (args.length &lt; 1) {</font></font>
<p><font face="Arial"><font size=-1>System.out.println("Usage - Java JSHosttest.class
&lt;js source file>");</font></font>
<p><font face="Arial"><font size=-1>return;</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>JSHost jsh = new JSHost();</font></font>
<p><font face="Arial"><font size=-1>System.out.println("Executing JavaScript
file - " + args[0]);</font></font>
<p><font face="Arial"><font size=-1>Object result = jsh.executeJS(args[0]);</font></font>
<p><font face="Arial"><font size=-1>if (result instanceof String){</font></font>
<p><font face="Arial"><font size=-1>System.out.println("Results - " + result);</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<p><font face="Arial"><font size=-1>}</font></font>
<br>&nbsp;
<br>&nbsp;
<p><font face="Arial"><font size=-1>For more explanations on the code execution,
please refer embedding tutorial <a href="http://www.mozilla.org/js/rhino/tutorial.html">http://www.mozilla.org/js/rhino/tutorial.html</a>
and for all documentation and examples on Rhino visit <a href="http://www.mozilla.org/rhino/doc.html">http://www.mozilla.org/rhino/doc.html</a>.</font></font>
<br>&nbsp;
<br>&nbsp;
<br>&nbsp;
<br>&nbsp;
<br>&nbsp;
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (WinNT; U) [Netscape]">
<title>Rhino Examples</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
Rhino Examples</h1></center>
Examples have been provided that show how to control the JavaScript engine
and to implement scriptable host objects. All the examples are in the cvs
tree at <tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/">mozilla/js/rhino/examples</a></tt>.
<br>&nbsp;
<h2>
Sample Scripts</h2>
The <tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/unique.js">unique.js</a></tt>
script allows printing unique lines from a file.
<p>The <tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/liveConnect.js">liveConnect.js</a></tt>
script shows a sample usage of LiveConnect (Java-to-JavaScript connectivity).
<p>The <tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/jsdoc.js">jsdoc.js</a></tt>
script is a JavaScript analog to Java's <tt>javadoc</tt>. It makes heavy
use of regular expressions.
<p>The <tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/checkParam.js">checkParam.js</a></tt>
script is a useful tool to check that <tt>@param</tt> tags in Java documentation
comments match the parameters in the corresponding Java method.
<p>The <tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/enum.js">enum.js</a></tt>
script is a good example of using a JavaAdapter to implement a Java interface
using a JavaScript object.
<p>The <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/NervousText.js">NervousText.js</a>
script is a JavaScript implementation of the famous NervousText applet
using JavaScript compiled to Java classes using <a href="jsc.html">jsc</a>.
It can be run in the HTML page <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/NervousText.html">NervousText.html</a>.
<br>&nbsp;
<h2>
Controlling the JavaScript Engine</h2>
<h4>
The RunScript class</h4>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/RunScript.java">RunScript.java</a></tt>
is a simple program that executes a script from the command line.
<h4>
The Control class</h4>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/Control.java">Control.java</a></tt>
is a program that executes a simple script and then manipulates the result.
<h4>
JavaScript Shell</h4>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/Shell.java">Shell.java</a></tt>
is a program that executes JavaScript programs; it is a simplified version
of the shell in the <tt>tools</tt> package. The programs may be specified
as files on the command line or by typing interactively while the shell
is running.
<h4>PrimitiveWrapFactory</h4>
<a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/PrimitiveWrap
Factory.java">PrimitiveWrapFactory.java</a> is an example of a WrapFactory that
can be used to control the wrapping behavior of the Rhino engine on calls to Jav
a methods.<br>
<h4>
<b>Multithreaded Script Execution</b></h4>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/DynamicScopes.java">DynamicScopes.java</a></tt>
is a program that creates a single global scope object and then shares
it across multiple threads. Sharing the global scope allows both information
to be shared across threads, and amortizes the cost of Context.initStandardObjects
by only performing that expensive operation once.
<br>&nbsp;
<h2>
Implementing Host Objects</h2>
First check out the <a href="http://www.mozilla.org/rhino/tutorial.html">tutorial</a>
if you haven't already.
<h4>
The Foo class - Extending ScriptableObject</h4>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/Foo.java">Foo.java</a></tt>
is a simple JavaScript host object that includes a property with an associated
action and a variable argument method.
<br>&nbsp;
<h4>
The Matrix class - Implementing Scriptable</h4>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/Matrix.java">Matrix.java</a></tt>
provides a simple multidimensional array by implementing the Scriptable
interface.
<br>&nbsp;
<h4>
The File class - An advanced example</h4>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/File.java">File.java</a></tt>
extends ScriptableObject to provide a means of reading and writing files
from JavaScript. A more involved example of host object definition.
<p>
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Rhino FAQ</title>
</head>
<body bgcolor="#FFFFFF">
<script src="owner.js"></script>
<center>
<h1>
Frequently Asked Questions about Rhino</h1></center>
<script>document.write(owner());</script>
<br><script>
var d = new Date(document.lastModified);
document.write((d.getMonth()+1)+"/"+d.getDate()+"/"+d.getFullYear());
document.write('<br>');
</script>
<center>
<hr WIDTH="100%"></center>
<p><b><font size=+2>Q</font>.</b> <i>How do I create a Java array from
JavaScript?</i>
<p><b><font size=+2>A.</font></b> You must use Java reflection. For instance,
to create an array of java.lang.String of length five, do
<blockquote><tt>var stringArray = java.lang.reflect.Array.newInstance(java.lang.String,
5);</tt></blockquote>
Then if you wish to assign the string "hi" to the first element, simply
execute <tt>stringArray[0] = "hi"</tt>.
<p>Creating arrays of primitive types is slightly different: you must use
the TYPE field. For example, creating an array of seven ints can be done
with the code
<blockquote><tt>var intArray = java.lang.reflect.Array.newInstance(java.lang.Integer.TYPE,
7);</tt></blockquote>
<p><br><b><font size=+2>Q</font>.</b> <i>When I try to execute a script
I get the exception </i><tt>Required security context missing</tt><i>.
What's going on?</i>
<p><b><font size=+2>A.</font></b> You've likely missed placing the <tt>Security.properties</tt>
file in your class path at <tt>org.mozilla.javascript.resources</tt>.
<h3>
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<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.51 [en] (WinNT; U) [Netscape]">
<title>Small Footprint</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
Small Footprint</h1></center>
A few changes can be made to reduce the footprint of Rhino for embeddings
where space is at a premium. On a recent build, the length of js.jar was 603,127 bytes corresponding to 1,171,708 bytes of all uncompressed Rhino classes with debug information included.
With various changes js.jar size can be reduced to 204,689 bytes corresponding to 424,774 bytes of uncompressed classes.
<h3>Tools</h3>
<p>
Most embeddings won't need any of the classes in <tt>org.mozilla.javascript.tools</tt> or any of its sub-packages.
<h3>
Optimizer</h3>
<p>
It is possible to run Rhino with interpreter mode only, allowing you to remove
classes for classfile generation that include all the classes from
<tt>org.mozilla.javascript.optimizer</tt> package and <tt>ClassNameHelper</tt>, <tt>ClassRepository</tt> classes from <tt>org.mozilla.javascript</tt> package.
<h3>JavaAdapter</h3>
<p>
Implementing the JavaAdapter functionality requires the ability to generate
classes on the fly. Removing <tt>org.mozilla.javascript.JavaAdapter</tt> will disable this functionality, but Rhino will otherwise run correctly.
<h3>Class generation library</h3>
<p>
If you do not include Optimizer or JavaAdapter, then you do not need Rhino library for class file generation and you can remove all the classes from in <tt>org.mozilla.classfile</tt> package.
<h3>Regular Expressions</h3>
<p>
The package <tt>org.mozilla.javascript.regexp</tt> can be removed. Rhino
will continue to run, although it will not be able to execute any regular
expression matches. This change saves 47,984 bytes of class files.
<h3>Debug information</h3>
<p>
Debug information in Rhino classes consumes about 25% of code size and if you can live without that, you can recompile Rhino to remove it.
<h2>smalljs.jar</h2>
Ant build script in Rhino supports smalljar target that will generate smalljs.jar that does not include Tools, Optimizer, JavaAdapter and Class generation library, Regular Expressions and deprecated files. To build such minimalist jar without debug information, run the following command from the top directory of Rhino distribution:
<pre>
ant clean
ant -Ddebug=off -Dno-regexp=true smalljar
</pre>
If you omit <tt>-Dno-regexp=true</tt>, then the resulting smalljs.jar will include Regular Expression support.
<p>
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]">
<title>Help with Rhino</title>
</head>
<body>
<center><b><font size=+3>Help with Rhino</font></b></center>
<script src="owner.js"></script>
<p>Have a question that you can't find answer to in the <a href="doc.html">documentation</a>?
Here are some additional resources for help:
<br>&nbsp;
<h3>
<font size=+1>Newsgroup and Mail Gateway</font></h3>
The <a href="news:netscape.public.mozilla.jseng">netscape.public.mozilla.jseng</a>
newsgroup answers questions about both Rhino and the C implementation of
JavaScript. You can get to the newsgroup through a mail gateway. Send a
message with the subject "subscribe" to <a href="mailto:mozilla-jseng-request@mozilla.org?subject=subscribe">mozilla-jseng-request@mozilla.org</a>.
To post messages, send mail to <a href="mailto:mozilla-jseng@mozilla.org">mozilla-jseng@mozilla.org</a>.
To unsubscribe, mail with "unsubscribe" in the subject to <a href="mailto:mozilla-jseng-request@mozilla.org?subject=unsubscribe">mozilla-jseng-request@mozilla.org</a>.
<p>
To view archived messages, try <a href="http://groups.google.com/groups?q=netscape.public.mozilla.jseng&hl=en&lr=&safe=off&site=groups">Google groups</a> or
other newsgroup services.
<h3>
Bug System</h3>
Use <a href="http://bugzilla.mozilla.org/enter_bug.cgi?product=Rhino">Bugzilla</a>
to enter bugs against Rhino. Note that Rhino has its own product category.
<br>&nbsp;
<h3>
Module Owner</h3>
The module owner,&nbsp;<script>document.write(owner());</script>
, can
be mailed for help as well, although he may copy his response to the newsgroup
to help others.
<p>
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.72 [en]C-NSCP (WinNT; U) [Netscape]">
<title>Rhino History</title>
</head>
<body>
<center><b><font size=+3>Rhino History</font></b></center>
<p>Rhino gets its name from the animal on the cover of the <a href="http://www.ora.com/">O'Reilly</a>
book about JavaScript.
<p>The Rhino project was started at Netscape in Fall 1997. At the time,
Netscape was planning to produce a version of Navigator written entirely
in Java and so it needed an implementation of JavaScript written in Java.
When Netscape stopped work on "Javagator", as it was called, somehow Rhino
escaped the axe (rumor had it that the executives "forgot" it existed).
Since then, a couple of major companies (including Sun) have licensed Rhino
for use in their products and paid Netscape to do so, allowing us to continue
work on it. Now Rhino is planned to be part of several server products
from Netscape as well.
<p>Originally, Rhino compiled all JavaScript code to Java bytecodes in
generated classfiles. This produced the best performance (often beating
the C implementation of JavaScript when run on a JIT), but suffered from
two faults. First, compilation time was long since generating Java bytecodes
and loading the generated classes was a heavyweight process. Also, the
implementation effectively leaked memory since most JVMs don't really collect
unused classes or the strings that are interned as a result of loading
a class file.
<p>So in Fall of 1998, Rhino added an interpretive mode. The classfile
generation code was moved to an optional, dynamically-loaded package. Compilation
is faster and when scripts are no longer in use they can be collected like
any other Java object.
<p>Rhino was released to mozilla.org in April of 1998. Originally Rhino
classfile generation had been held back from release. However the licensees
of Rhino have now agreed to release all of Rhino to open source, including
class file generation. Since its release to open source, Rhino has found
a variety of <a href="users.html">uses</a> and an increasing
number of people have contributed to the code.
<p>
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<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.7 [en] (WinNT; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java, Mozilla">
<title>Rhino - JavaScript for Java</title>
</head>
<body>
<center>
<h1>
Rhino: JavaScript for Java</h1></center>
<center><img SRC="rhino50.jpg" height=200 width=398></center>
<hr WIDTH="100%">Rhino is an open-source implementation of JavaScript written
entirely in Java. It is typically embedded into Java applications to provide
scripting to end users.
<table WIDTH="100%" >
<tr>
<td>
<div align=right><b><a href="download.html">Downloads</a></b></div>
</td>
<td>How to get source and binaries.</td>
</tr>
<tr>
<td>
<div align=right><b><a href="doc.html">Documentation</a></b></div>
</td>
<td>Information on Rhino for script writers and embedders.</td>
</tr>
<!--
<tr>
<td>
<div align=right><b><a href="users.html">Users</a></b></div>
</td>
<td>How people are using Rhino.</td>
</tr>
-->
<tr>
<td>
<div align=right><b><a href="history.html">History</a></b></div>
</td>
<td>The ancestry of the beast.</td>
</tr>
<tr>
<td>
<div align=right><b><a href="help.html">Help</a></b></div>
</td>
<td>Some resources if you get stuck.</td>
</tr>
</table>
<hr WIDTH="100%"><font size=-1>Module owner&nbsp;</font><script src="owner.js"></script>
<script>document.write(owner());</script>
<br><font size=-1>Rhino image courtesy of Paul Houle.</font><!---
Add reference to
http://www.javaworld.com/jw-08-1999/jw-08-howto.html
and
http://www.javaworld.com/javaworld/jw-09-1999/jw-09-howto.html
--->
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<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.6 [en] (WinNT; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Followup to JavaOne</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
Followup to JavaOne session on Rhino</h1></center>
This page is intended to follow up on the <a href="http://www.javasoft.com/javaone/">JavaOne</a>
session on <a href="http://industry.java.sun.com/javaone/99/event/0,1768,629,00.html">"Rhino:
JavaScript for the Java Platform"</a>. I hope it will be useful whether
or not you actually attended the talk.
<br>&nbsp;
<h2>
Slides</h2>
<a href="http://industry.java.sun.com/javaone/99/pdfs/e629.pdf">Slides</a>
(PDF file, 1112246 bytes)&nbsp; can be downloaded from Sun's site.
<br>&nbsp;
<br>&nbsp;
<h2>
More on Q &amp; A</h2>
Following the talk there was an excellent question and answer session where
many attendees asked good questions and offered useful suggestions. I'll
follow up on some of those here. I'll start a thread on the newsgroup <a href="news://news.mozilla.org/netscape.public.mozilla.jseng">netscape.public.mozilla.jseng</a>
so people can ask addition questions or comments there.
<h3>
Java classes visible to scripts</h3>
One attendee raised the point that many embeddings may not want scripts
to be able to access all Java classes. This is an excellent point, and
I've implemented an addition to the <a href="../js/rhino/org/mozilla/javascript/SecuritySupport.html">SecuritySupport</a>
class that allows embedders to choose which classes are exposed to scripts.
<h3>
Easier "importing" of Java classes</h3>
Another attendee suggested that the current method of referring to Java
classes (like <tt>java.lang.String</tt> or <tt>Packages.org.mozilla.javascript.Context</tt>)
could be improved. I've implemented a set of changes that make importing
easier, but I'm not convinced that adding them is the right thing to do
due to some drawbacks.
<p>To see what I've done, take a look at the javadoc for the <a href="../js/rhino/org/mozilla/javascript/ImporterTopLevel.html">ImporterTopLevel</a>
class. You'll see that it's now possible to make function calls to "import"
Java classes so that they can be referred to without qualification. I didn't
use the word "import" because that's a keyword in JavaScript.
<p>There are a few drawbacks to this implemenation. First, there is a runtime
cost associated with every lookup of a top-level variable. The problem
is that it's not possible to use the Java runtime to determine the set
of classes from a given package. Instead, importing the package "java.util"
saves the package name in a special list and every access to the global
scope that fails to find a matching variable causes the runtime to see
if there is a class by that name in the "java.util" package. Even for lookups
that succeed there is an additional method call.
<p>Another drawback to this implementation is namespace pollution: now
"importClass" and "importPackage" have special meaning. It's still possible
to substitute your own variables for these functions, but it's still possible
that program behavior could change.
<p>So I'm interested in people's opinion: Is this benefit worth the costs?
<p>
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<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.7 [en] (WinNT; U) [Netscape]">
<title>JavaScript Compiler</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
JavaScript Compiler</h1></center>
The JavaScript compiler translates JavaScript source into Java class files.
The resulting Java class files can then be loaded and executed at another
time, providing a convenient method for transfering JavaScript, and for
avoiding translation cost.
<p>Note that the top-level functions available to the shell (such as <tt>print</tt>)
are <i>not</i> available to compiled scripts when they are run outside
the shell.
<br>&nbsp;
<h2>
Invoking the Compiler</h2>
<tt>java org.mozilla.javascript.tools.jsc.Main</tt> [<i>options</i>] <i>file1</i><tt>.js</tt>
[<i>file2</i><tt>.js</tt>...]
<p>where <i>options</i> are:
<p><tt>-extends <i>java-class-name</i></tt>
<blockquote>Specifies that a java class extending the Java class <i>java-class-name</i>
should be generated from the incoming JavaScript source file. Each global
function in the source file is made a method of the generated class, overriding
any methods in the base class by the same name.</blockquote>
<tt>-implements <i>java-intf-name</i></tt>
<blockquote>Specifies that a java class implementing the Java interface
<i><tt>java-intf-name</tt></i>
should be generated from the incoming JavaScript source file. Each global
function in the source file is made a method of the generated class, implementing
any methods in the interface by the same name.</blockquote>
<tt>-debug</tt>
<br><tt>-g</tt>
<ul>Specifies that debug information should be generated. May not be combined
with optimization at an <i>optLevel</i> greater than zero.</ul>
<tt>-nosource</tt>
<ul>Does not save the source in the class file. Functions and scripts compiled
this way cannot be decompiled. This option can be used to avoid distributing
source or simply to save space in the resulting class file.</ul>
<tt>-o </tt><i>outputFile</i>
<ul>Writes the class file to the given file (which should end in <tt>.class</tt>).
The string <i>outputFile</i> must be a writable filename.</ul>
<tt>-opt </tt><i>optLevel</i>
<br><tt>-O</tt> <i>optLevel</i>
<ul>Optimizes at level <i>optLevel</i>, which must be an integer between
-1 and 9. See <a href="opt.html">Optimization</a> for more details. If
<i>optLevel</i>
is greater than zero, <tt>-debug</tt> may not be specified.</ul>
<tt>-package</tt> <i>packageName</i>
<ul>Specifies the package to generate the class into. The string <i>packageName</i>
must be composed of valid identifier characters optionally separated by
periods.</ul>
<tt>-version </tt><i>versionNumber</i>
<ul>Specifies the language version to compile with. The string <i>versionNumber</i>
must be one of <tt>100</tt>, <tt>110</tt>, <tt>120</tt>, <tt>130</tt>,
or <tt>140</tt>. See <a href="overview.html#versions">JavaScript Language
Versions</a> for more information on language versions.</ul>
<h2>
Examples</h2>
<tt>$ cat test.js</tt>
<br><tt>java.lang.System.out.println("hi, mom!");</tt>
<br><tt>$ java org.mozilla.javascript.tools.jsc.Main test.js</tt>
<br><tt>$ ls *.class</tt>
<br><tt>test.class</tt>
<br><tt>$ java test</tt>
<br><tt>hi, mom!</tt>
<p><tt>$ java org.mozilla.javascript.tools.jsc.Main -extends java.applet.Applet
\</tt>
<br><tt>&nbsp;&nbsp;&nbsp; -implements java.lang.Runnable NervousText.js</tt>
<br>&nbsp;
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<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.72 [en]C-NSCP (WinNT; U) [Netscape]">
<title>JavaScript Requirements and Limitations</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
Requirements and Limitations</h1></center>
<h2>
<b>Requirements</b></h2>
Rhino requires version 1.1 or greater of Java.
<p>To use the JavaAdapter feature or an optimization level of 0 or greater,
Rhino must be running under a security manager that allows the definition
of class loaders.
<p>
<hr WIDTH="100%">
<h2>
<b>Limitations</b></h2>
<h3>
<b>Platforms and </b>JITs</h3>
Many platforms and JREs have problems converting decimal numbers to and
from strings. These errors are usually boundary case errors and will show
up as test failures in section 7.7.3.
<p>Windows versions of the Symantec JIT prior to 3.00.029(i) will report
internal errors for some generated class files.
<p>On the Symantec JIT and the AIX JVM, accessing a static field of a class
that has not yet loaded may not give the correct value of the field. For
example, accessing
<tt>java.io.File.separatorChar</tt> before <tt>java.io.File</tt>
has been loaded will return a value of 0. (This is a bug in the JIT; accessing
the field should cause the class to be loaded.)
<p>The AIX Java version "JDK 1.1.6 IBM build a116-19980924 (JIT enabled:
jitc)" core dumps running several classes generated by Rhino. It also has
errors in java.lang.Math.pow that are reflected as failures in the JavaScript
Math object's pow method.
<p>IBM Java for Linux version "JDK 1.1.8 IBM build l118-19991013 (JIT enabled:
jitc)" has errors in java.lang.Math.pow that are reflected as test failures
in the JavaScript Math object's pow method.
<p>Solaris JDK 1.1.6 has errors in java.lang.Math.atan2 that are reflected
as test failures in the JavaScript Math object's atan2 method.
<br>&nbsp;
<h3>
<b>LiveConnect</b></h3>
If a JavaObject's field's name collides with that of a method, the value
of that field is retrieved lazily, and can be counter-intuitively affected
by later assignments:
<blockquote><tt>javaObj.fieldAndMethod = 5;</tt>
<br><tt>var field = javaObj.fieldAndMethod;</tt>
<br><tt>javaObj.fieldAndMethod = 7;</tt>
<br><tt>// now, field == 7</tt></blockquote>
You can work around this by forcing the field value to be converted to
a JavaScript type when you take its value:
<blockquote><tt>javaObj.fieldAndMethod = 5;</tt>
<br><tt>var field = javaObj.fieldAndMethod + 0; // force conversion now</tt>
<br><tt>javaObj.fieldAndMethod = 7;</tt>
<br><tt>// now, field == 5</tt></blockquote>
<h3>
<b>JSObject</b></h3>
Rhino does NOT support the <tt>netscape.javascript.JSObject</tt> class.
<br>&nbsp;
<h3>
<b>Date object</b></h3>
The JavaScript Date object depends on time facilities of the underlying
Java runtime to determine daylight savings time dates. Earlier JRE versions
may report a date for the daylight savings changeover that is a week off.
JRE 1.1.6 reports the correct date.
<p>Under the 1.1.6 JRE, evaluating <tt>(new Date(1998, 9, 25, 2)).toString()</tt>
returns:
<pre>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Sun Oct 25 02:00:00 GMT-0800 (PST) 1998</pre>
Earlier versions may return:
<pre>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Sun Oct 25 02:00:00 GMT-0700 (PDT) 1998</pre>
(the JRE doesn't report the changeover until Nov. 1.)
<p>The Microsoft SDK 3.1 for Java also exhibits this problem.
<p>
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<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Author" CONTENT="Norris Boyd">
<META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (WinNT; U) [Netscape]">
<TITLE>Optimization</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<CENTER>
<H1>
Optimization</H1></CENTER>
<H2>
Optimization settings</H2>
<P>The currently supported optimization settings are:</P>
<P><B>-1</B>
<P><B></B>Interpretive mode is always
used. The compilation time is minimized at the expense of runtime performance.
No class files are generated, which may improve memory usage depending on your
system.
<p>
If the optimization package is not available, then optimization acts as if it is always -1.
</P>
<P><B>0</B>
<P><B></B>No optimizations are
performed. The bytecode compiler runs fastest in this mode, but the generated byte code
is less efficient.</P>
<P><B>1-9</B>
<P>All optimizations are performed. Simple data &amp; type
flow analysis is performed to determine which JavaScript variables can be
allocated to Java VM registers, and which variables are used only as Numbers.
Local common sub-expressions are collapsed (currently this only happens for
property lookup, but in the future more expressions may be optimized). All local
variables and parameters are allocated to Java VM registers. Function call
targets are speculatively pre-cached (based on the name used in the source) so
that dispatching can be direct, pending runtime confirmation of the actual
target. Arguments are passed as Object/Number pairs to reduce conversion
overhead.</P>
<P>Note:
<OL>
<LI>
Some language features (indirect calls to eval, use
of the arguments property of function objects) were previously not supported
in higher optimization levels. These features have been removed from the
language in ECMA, so higher optimization levels are now conformant.
<LI>
Future versions may allocate more aggressive
optimizations to higher optimization levels. For compatibility with future
versions, use level 1. For maximal optimization, use level 9, but retest
your application when upgrading to new versions.</LI>
</OL>
<P>
<HR WIDTH="100%">
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.72 [en]C-NSCP (WinNT; U) [Netscape]">
<title>JavaScript Overview</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
Rhino Overview</h1></center>
<h3>
Overview of Rhino</h3>
Most people who have used JavaScript before have done so by adding scripts
to their HTML web pages. However, Rhino is an implementation of the core
language only and doesn't contain objects or methods for manipulating HTML
documents.
<p>Rhino contains
<ul>
<li>
All the features of JavaScript 1.5</li>
<li>
Allows direct scripting of Java</li>
<li>
A JavaScript shell for executing JavaScript scripts</li>
<li>
A JavaScript compiler to transform JavaScript source files into Java class
files</li>
</ul>
<h3>
Language</h3>
The JavaScript language itself is standardized by Standard ECMA-262 <i>ECMAScript:
A general purpose, cross-platform programming language</i>. Rhino 1.5 implements
JavaScript 1.5, which conforms to Edition 3 of the Standard. The Standard
may be <a href="http://www.ecma.ch/ecma1/STAND/ECMA-262.HTM">downloaded</a> or
obtained by mail from ECMA, 114 Rue du Rh&ocirc;ne, CH1204 Geneva, Switzerland.
<p>In addition, Rhino has implemented JavaAdapters, which allows JavaScript
to implement any Java interface or extend any Java class with a JavaScript
object. See the <tt>enum.js</tt> example for more information.
<p>Numerous books and tutorials on JavaScript are available.
<br>&nbsp;
<br>&nbsp;
<h3>
Deprecated Language Features</h3>
Several language features introduced in JavaScript 1.2 are now deprecated.
These features allow "computational reflection": that is, the ability for
a script to determine and influence aspects of the way it is evaluated.
These features are generally not broadly useful, yet they impose significant
constraints on implementations that hamper or prevent optimization. The
deprecated features are the <tt>__proto__</tt> and <tt>__parent__</tt>
properties, and the constructors <tt>With</tt>, <tt>Closure</tt>, and <tt>Call</tt>.
Attempts to invoke these constructors with the language version 1.4 will
result in an error. For other versions, a warning will be generated.
<br>&nbsp;
<br>&nbsp;
<h3>
Internationalization</h3>
The messages reported by the JavaScript engine are by default retrieved
from the property file <tt>org/mozilla/javascript/resources/Messages.properties</tt>.
If other properties files with extensions corresponding to the current
locale exist, they will be used instead.
<br>&nbsp;
<br>&nbsp;
<h3>
<a NAME="versions"></a>JavaScript Language Versions</h3>
Some behavior in the JavaScript engine is dependent on the language version.
In browser embeddings, this language version is selected using the LANGUAGE
attribute of the SCRIPT tag with values such as "JavaScript1.2".
<p>Version 1.3 and greater are ECMA conformant.
<p><b>Operators <tt>==</tt> and <tt>!=</tt></b>
<p>Version 1.2 only uses strict equality for the == and != operators. In
version 1.3 and greater, == and != have the same meanings as ECMA. The
operators === and !== use strict equality in all versions.
<p><b>ToBoolean</b>
<p><tt>Boolean(new Boolean(false))</tt> is false for all versions before
1.3. It is true (and thus ECMA conformant) for version 1.3 and greater.
<p><b>Array.prototype.toString and Object.prototype.toString</b>
<p>Version 1.2 only returns array or object literal notation ("[1,2,3]"
or "{a:1, b:2}" for example). In version 1.3 and greater these functions
are ECMA conformant.
<p><b>Array constructor</b>
<p><tt>Array(i)</tt> for a number argument <tt>i</tt> constructs an array
with a single element equal to <tt>i</tt> for version 1.2 only. Otherwise
the ECMA conformant version is used (an array is constructed with no elements
but with length property equal to <tt>i</tt>).
<p><b>String.prototype.substring</b>
<p>For version 1.2 only, the two arguments are not swapped if the first
argument is less than the second one. All other versions are ECMA compliant.
<p><b>String.prototype.split</b>
<p>For version 1.2 only, split performs the Perl4 special case when given
a single space character as an argument (skips leading whitespace, and
splits on whitespace). All other versions split on the space character
proper as specified by ECMA.
<br>&nbsp;
<br>&nbsp;
<h3>
Security</h3>
The security features in Rhino provide the ability to track the origin
of a piece of code (and any pieces of code that it may in turn generate).
These features allow for the implementation of a traditional URL-based
security policy for JavaScript as in Netscape Navigator. Embeddings that
trust the JavaScript code they execute may ignore the security features.
<p>Embeddings that run untrusted JavaScript code must do two things to
enable the security features. First, every <tt>Context</tt> that is created
must be supplied an instance of an object that implements the <tt>SecuritySupport</tt>
interface. This will provide Rhino the support functionality it needs to
perform security-related tasks.
<p>Second, the value of the property <tt>security.requireSecurityDomain</tt>
should be changed to <tt>true</tt> in the resource bundle <tt>org.mozilla.javascript.resources.Security</tt>.
The value of this property can be determined at runtime by calling the
<tt>isSecurityDomainRequired</tt>
method of <tt>Context</tt>. Setting this property to true requires that
any calls that compile or evaluate JavaScript must supply a security domain
object of any object type that will be used to identify JavaScript code.
In a typical client embedding, this object might be a string with the URL
of the server that supplied the script, or an object that contains a representation
of the signers of a piece of code for certificate-based security policies.
<p>When JavaScript code attempts a restricted action, the security domain
can be retrieved in the following manner. The class context should be obtained
from the security manager (see <tt>java.lang.SecurityManager.getClassContext()</tt>).
Then, the class of the code that called to request the restricted action
can be obtained by looking an appropriate index into the class context
array. If the caller is JavaScript the class obtained may be one of two
types. First, it may be the class of the interpreter if interpretive mode
is in effect. Second, it may be a generated class if classfile generation
is supported. An embedding can distinguish the two cases by calling <tt>isInterpreterClass()</tt>
in the <tt>Context</tt> class. If it is the interpreter class, call the
getInterpreterSecurityDomain() method of Context to obtain the security
domain of the currently executing interpreted script or function. Otherwise,
it must be a generated class, and an embedding can call <tt>getSecurityDomain()</tt>
in the class implementing
<tt>SecuritySupport</tt>. When the class was
defined and loaded, the appropriate security domain was associated with
it, and can be retrieved by calling this method. Once the security domain
has been determined, an embedding can perform whatever checks are appropriate
to determine whether access should be allowed.
<p>
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.5 [en]C-NSCP (WinNT; I) [Netscape]">
<title>Performance Hints</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
Performance Hints</h1></center>&nbsp;
<h3>
<tt>var</tt> Statements</h3>Use <tt>var</tt> statements when possible. Not only is it good
programming practice, it can speed up your code by allowing the compiler to
generate special code to access the variables. For example, you could rewrite
<p><tt>function sum(a) {</tt>
<br><tt>&nbsp;&nbsp;&nbsp; result = 0;</tt>
<br><tt>&nbsp;&nbsp;&nbsp; for (i=0; i &lt;
a.length; i++)</tt>
<br><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; result += a[i];</tt>
<br><tt>&nbsp;&nbsp;&nbsp; return result;</tt>
<br><tt>}</tt>
<p>as
<p><tt>function sum(a) {</tt>
<br><tt>&nbsp;&nbsp;&nbsp; var result = 0;</tt>
<br><tt>&nbsp;&nbsp;&nbsp; for (var i=0; i
&lt; a.length; i++)</tt>
<br><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; result += a[i];</tt>
<br><tt>&nbsp;&nbsp;&nbsp; return result;</tt>
<br><tt>}</tt>
<p>This is not equivalent code because the second version does
not modify global variables <tt>result</tt> and <tt>i</tt>. However, if you don't intend for any other function to
access these variables, then storing them globally is probably wrong anyway
(what if you called another function that had a loop like the one in <tt>sum</tt>!).
<br>&nbsp;
<h3>
Arrays</h3>Use the forms of the Array constructor that
specify a size or take a list of initial elements. For example, the code
<p><tt>var a = new Array();</tt>
<br><tt>for (var i=0; i &lt; n; i++)</tt>
<br><tt>&nbsp;&nbsp;&nbsp; a[i] = i;</tt>
<p>could be sped up by changing the constructor call to <tt>new Array(n)</tt>. A constructor call like that indicates to
the runtime that a Java array should be used for the first <i>n</i> entries of the array. Similarly,
<tt>new
Array(&quot;a&quot;, &quot;b&quot;, &quot;c&quot;)</tt> or <tt>[&quot;a&quot;, &quot;b&quot;, &quot;c&quot;]</tt> will cause a 3-element
Java array to be allocated to hold the contents of the JavaScript array.
<br>&nbsp;
<br>&nbsp;
<h3>
<tt>eval</tt> and <tt>new Function</tt></h3>Avoid calling <tt>eval</tt> when
possible. Calls to <tt>eval</tt> are slow because the script
being executed must be compiled. Constructing a new function object can be slow
for the same reason, while function expressions are more efficient because the
function can be compiled. For example, the code
<p><tt>function MyObject(a) {</tt>
<br><tt>&nbsp;&nbsp;&nbsp; this.s = a;</tt>
<br><tt>&nbsp;&nbsp;&nbsp; this.toString = new
Function(&quot;return this.s&quot;);</tt>
<br><tt>}</tt>
<p>could be written more efficiently as
<p><tt>function MyObject(a) {</tt>
<br><tt>&nbsp;&nbsp;&nbsp; this.s = a;</tt>
<br><tt>&nbsp;&nbsp;&nbsp; this.toString =
function () { return this.s }</tt>
<br><tt>}</tt>
<p>Beginning with Rhino 1.4 Release 2, code
passed to eval and new Function will be interpreted rather than compiled to
class files.
<br>&nbsp;</p>
<h3>
with</h3>Using the <tt>with</tt>
statement prevents the compiler from generating code for fast access to local
variables. You're probably better off explicitly accessing any properties of the
object.
<br>&nbsp;
<p>
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>What's New in Rhino 1.5</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
What's New in Rhino 1.5 Release 1</h1></center>
<h2>
ECMA 262 Edition 3 Conformance</h2>
Rhino 1.5 implements JavaScript 1.5, which conforms to ECMA 262 Edition
3 (sometimes referred to as "ECMAScript"). Edition 3 standardized several
features of JavaScript that were present in JavaScript 1.4, including:
<ul>
<li>
regular expressions</li>
<li>
<tt>switch</tt> statements</li>
<li>
<tt>do</tt>...<tt>while</tt> loops</li>
<li>
statement labels and labelled <tt>break</tt> and <tt>continue</tt></li>
<li>
object literals</li>
<li>
nested functions</li>
<li>
exception handling</li>
<li>
the <tt>instanceof</tt> operator</li>
<li>
the <tt>in</tt> operator</li>
</ul>
In addition, new features were added to Edition 3 and JavaScript 1.5, including:
<ul>
<li>
Perl 5 regular expressions, including operators like greedy quantifiers</li>
<li>
errors as exceptions</li>
<li>
number formatting (<tt>Number.prototype.toFixed</tt>, <tt>Number.prototype.toExponential</tt>,
and <tt>Number.prototype.toGeneral</tt>)</li>
</ul>
<h2>
Changes since Rhino 1.4 Release 3</h2>
Other significant changes to Rhino since the initial release to open source
(1.4 Release 3) are listed below. Bug fixes won't be mentioned here, just
API changes or significant functionality changes.
<h3>
Compilation mode</h3>
Rhino has two modes of execution available. Interpretive mode has an interpreter
loop implemented in Java. Compilation mode compiles JavaScript code to
Java bytecodes in class files. This compilation can be done as part of
script evaluation using the same APIs already available for the interpreter,
or in a separate compile-time step. The code for the interpreter is located
in the <tt>org.mozilla.javascript.optimizer</tt> package.
<br>&nbsp;
<h3>
JavaScript Compiler</h3>
The distribution now contains an extra class that can be invoked from the
command line. This is <tt>jsc</tt>, the JavaScript compiler. This tool
can be used to create Java classes from JavaScript. Options exist to allow
creation of Java classes that implement arbitrary interfaces and extend
arbitrary base classes, allowing JavaScript scripts to implement important
protocols like applets and servlets. See <a href="http://www.mozilla.org/rhino/jsc.html">http://www.mozilla.org/rhino/jsc.html</a>.
<br>&nbsp;
<h3>
LiveConnect 3</h3>
Rhino now supports the LiveConnect 3 specification, or LC3. The most notable
change is support for overloaded method resolution. See <a href="http://www.mozilla.org/js/liveconnect/lc3_proposal.html">LiveConnect
Release 3 Goals/Features</a>.
<br>&nbsp;
<h3>
JavaBeans properties reflected as Java properties</h3>
Java classes with getFoo/setFoo methods will have a "foo" property in the
JavaScript reflection. Boolean methods are also reflected.
<br>&nbsp;
<h3>
Dynamic scope support</h3>
Rhino 1.5 implements support for dynamic scopes, which are particularly
useful for multithreaded environments like server embeddings.
<br>&nbsp;
<h3>
New semantics for <tt>ScriptableObject.defineClass</tt></h3>
The old rules for defining JavaScript objects using a Java class were getting
baroque. Those rules are still supported, but a cleaner definition is now
supported. See the <a href="http://www.mozilla.org/js/rhino/org/mozilla/javascript/ScriptableObject.html#defineClass(org.mozilla.javascript.Scriptable, java.lang.Class)">javadoc</a>
for details.
<br>&nbsp;
<h3>
Support for the Java 2 <tt>-jar</tt> option</h3>
It's now possible to start the shell using the new <tt>-jar</tt> option
in Java 2.
<br>&nbsp;
<h3>
Shell changes</h3>
Two changes here: addition of the "environment" and "history" top-level
variables.
<br>&nbsp;
<h3>
Java classes visible to scripts</h3>
An attendee at JavaOne raised the point that many embeddings may not want
scripts to be able to access all Java classes. This is an excellent point,
and I've implemented an addition to the <a href="../js/rhino/org/mozilla/javascript/SecuritySupport.html">SecuritySupport</a>
interface that allows embedders to choose which classes are exposed to
scripts.
<br>&nbsp;
<h3>
SecuritySupport and JavaAdapter</h3>
Andrew Wason pointed a problem with the new JavaAdapter feature (which
allows JavaScript objects to implement arbitrary Java interfaces by generating
class files). It didn't support the <a href="../js/rhino/org/mozilla/javascript/SecuritySupport.html">SecuritySupport</a>
interface, which allows Rhino to delegate the creation of classes from
byte arrays to a routine provided by the embedding. This ability is important
from a security standpoint because class creation is considered a privileged
action.
<p>I've checked in changes that fix this problem. If a SecuritySupport
class is specified when a Context is created, uses of JavaAdapter will
will delegate class creation to the SecuritySupport class.
<br>&nbsp;
<h3>
Context.exit()</h3>
Context.exit() has been changed from an instance method to a static method.
This makes it match the Context.enter() method, which is also static. See
the <a href="http://www.mozilla.org/js/rhino/org/mozilla/javascript/Context.html#exit()">javadoc</a>
for more information on its operation.
<br>&nbsp;
<h3>
Context.enter(Context)</h3>
A new overloaded form of Context.enter has been added. Without the addition
of this method it was not possible to attach an existing context to a thread.
See the <a href="http://www.mozilla.org/js/rhino/org/mozilla/javascript/Context.html#enter(org.mozilla.javascript.Context)">javadoc</a>
for more information on its operation.
<br>&nbsp;
<h3>
Listeners for Context</h3>
Context now supports property change listeners for a couple of its properties.
<h3>
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Rhino 1.5 Release 2</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
What's New in Rhino 1.5 Release 2</h1></center>
This is a log of significant changes since the release of Rhino 1.5 Release
1.
<br>&nbsp;
<h2>
Graphical debugger</h2>
Thanks to a contribution by Christopher Oliver, Rhino now has a graphical
debugger. See <a href="debugger.html">Rhino Debugger</a> for more details.
<br>&nbsp;
<h2>
Footprint reductions</h2>
Igor Bukanov has provided a wealth of changes to reduce the number and
size of objects required by Rhino. In particular, he introduced a new way
to represent the built-in objects like Date and RegExp that reduces the
amount of memory required and speeds up <tt>Context.initStandardObjects</tt>.
<br>&nbsp;
<h2>
Interpreted mode performance improvements</h2>
Igor Bukanov also made a number of improvements to interpreter mode performance.
<br>&nbsp;
<h2>
JS/CORBA Adapter</h2>
Matthias Radestock wrote a module that allows JavaScript code to interact
with CORBA. See <a href="http://sourceforge.net/projects/jscorba">http://sourceforge.net/projects/jscorba</a>
for more details.
<br>&nbsp;
<h2>
Directory restructuring and Ant buildfile</h2>
I've restructured the the Rhino directory and written an <a href="http://jakarta.apache.org/ant/index.html">Ant</a>
buildfile. This should make building easier and more consistent with other
open source Java projects.
<br>&nbsp;
<h2>
FlattenedObject deprecated</h2>
I wrote FlattenedObject to provide a means for dealing with JavaScript
<br>objects in prototype chains. Where Scriptable defines the primitive
<br>operations, FlattenedObject defines the aggregate operations of
<br>manipulating properties that may be defined in an object or in an object
<br>reachable by a succession of getPrototype calls.
<p>However, I now believe that I designed FlattenedObject poorly. Perhaps
<br>it should have been a clue that I was never satisfied with the name:
if
<br>it's hard to express the name of the object it may mean the function
the
<br>object is supposed to fulfill is not well defined either. The problem
is
<br>that it is inefficient since it requires an extra object creation,
and
<br>balky because of that extra level of wrapping.
<p>So I've checked in changes that deprecate FlattenedObject. I've
<br>introduced new static methods in ScriptableObject (thanks to
<br>beard@netscape.com for the idea) that replace the functionality. These
<br>methods perform the get, put, and delete operations on a Scriptable
<br>object passed in without the overhead of creating a new object.
<h2>
WrapHandler interface</h2>
Embeddings that wish to provide their own custom wrappings for Java objects
may implement this interface and
<br>call Context.setWrapHandler. See WrapHandler javadoc.
<br>&nbsp;
<h2>
ClassOutput interface</h2>
An interface embedders can implement in order to control the placement
of generated class bytecodes. See the javadoc.
<h3>
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Change Log</title>
</head>
<body bgcolor="#ffffff">
<center>
<h1> Change Log for Significant Rhino Changes</h1>
</center>
This is a log of significant changes since the release of Rhino 1.5 Release
2.
<p> </p>
<h3> </h3>
<h3>Serialization</h3>
See the <a href="serialization.html">serialization documentation</a>
.<br>
<br>
<h3>Class writer API changes</h3>
Courtesy of Kemal Bayram.<br>
<br>
"The biggest change I've made is the replacement of ClassOutput with<br>
ClassRepository that has the single method:<br>
<br>
&nbsp;&nbsp;&nbsp; public boolean storeClass(String className, byte[] classBytes,<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
boolean isTopLevel) throws IOException;<br>
<br>
This interface allows any arbitary storage method, such as a<br>
Hashtable/Map. In addition it also allows you to specify whether a<br>
class should be loaded, via returning true or false.&nbsp; You can still
use<br>
ClassOutput as I've coded an internal wrapper.<br>
<br>
With this interface it has also been possible to strip out the file<br>
saving code from Codegen and OptClassNameHelper.&nbsp; The file<br>
saving code is now an inner class FileClassRepository in Context. As<br>
a consequence of this&nbsp; I've stripped out some methods from ClassNameHelper.<br>
The resulting code is much more cleaner then before hand and everything<br>
still works as per usual.<br>
<br>
Other small additions are:<br>
&nbsp; o&nbsp; Annonymous functions are now named class$1 instead of class1<br>
&nbsp; o&nbsp; get/setClassName added to ClassNameHelper exposed in Context.
"<br>
<br>
<h3>Bunches of bug fixes and optimizations from Igor Bukanov and others</h3>
See the CVS logs<br>
<h3>
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<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Igor Bukanov">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Debug API changes</title>
</head>
<body bgcolor="#ffffff">
<h2 align="center">Debug API changes in Rhino 1.5 Release 4</h2>
<p>
The main difference between the old and new API is that the application needs to implement both org.mozilla.javascript.debugger.Debugger and
org.mozilla.javascript.debugger.DebugFrame interfaces to receive debug
information during script execution. See the API documentation for these
classes for details:
<br>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/src/org/mozilla/javascript/debug/DebugFrame.java">http://lxr.mozilla.org/mozilla/source/js/rhino/src/org/mozilla/javascript/debug/DebugFrame.java</a>
<br><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/src/org/mozilla/javascript/debug/Debugger.java">http://lxr.mozilla.org/mozilla/source/js/rhino/src/org/mozilla/javascript/debug/Debugger.java</a>
</tt>
<p>
In addition the org.mozilla.javascript.debugger.DebuggableEngine interface and the getDebuggableEngine method in org.mozilla.javascript.Context are replaced by 3 Context methods: setDebugger, getDebugger and getDebuggerContextData to set/get debugger and its Context data in the current thread Context:<br>
<tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/src/org/mozilla/javascript/Context.java">http://lxr.mozilla.org/mozilla/source/js/rhino/src/org/mozilla/javascript/Context.java</a></tt>
<p>The following gives few examples how to update your current application to the new API.
<p>
1. Setting and querying a Debugger implementation
<p>
Old API:
<pre>
cx.getDebuggableEngine.setDebugger(debugger);
cx.getDebuggableEngine.getDebugger();
</pre>
New API:
<pre>
cx.setDebugger(debugger);
cx.getDebugger();
</pre>
<p>
2. Monitoring execution of each line in the script
<p>
Old implementation:
<pre>
public MyDebugger implement Debugger {
public void handleCompilationDone(Context cx,
DebuggableScript fnOrScript,
StringBuffer source)
{
}
void handleBreakpointHit(Context cx)
{
DebugFrame frame = cx.getDebuggableEngine().getFrame(0);
System.out.println("New line:" + frame.getLineNumber());
}
void handleExceptionThrown(Context cx, Object exception)
{
}
}
...
cx.getDebuggableEngine.setDebugger(new MyDebugger());
cx.getDebuggableEngine.setBreakNextLine(true);
</pre>
New implementation:
<pre>
public MyDebugger implement Debugger
{
public void handleCompilationDone(Context cx,
DebuggableScript fnOrScript,
StringBuffer source)
{
}
public DebugFrame getFrame(Context cx, DebuggableScript fnOrScript)
{
return new MyDebugFrame();
}
}
class MyDebugFrame implements DebugFrame
{
public void onEnter(Context cx, Scriptable activation,
Scriptable thisObj, Object[] args)
{
}
public void onExceptionThrown(Context cx, Throwable ex)
{
}
public void onExit(Context cx, boolean byThrow,
Object resultOrException)
{
}
public void onLineChange(Context cx, int lineNumber)
{
System.out.println("New line:" + frame.getLineNumber());
}
}
...
cx.setDebugger(new MyDebugger());
</pre>
Note the in the new implementation the application can monitor function enter/exit by customizing enterFrame and onExit in the above code.
<p>
3. Breakpoint handling
<p>
Old implementation:
<pre>
public MyDebugger implement Debugger {
public void handleCompilationDone(Context cx, DebuggableScript fnOrScript,
StringBuffer source)
{
int breakpointLine = ...;
fnOrScript.placeBreakpoint(breakpointLine);
}
void handleBreakpointHit(Context cx) {
DebugFrame frame = cx.getDebuggableEngine().getFrame(0);
System.out.println("Breakpoint hit: "+frame.getSourceName()+":"+frame.getLineNumber());
}
void handleExceptionThrown(Context cx, Object exception)
{
}
}
...
cx.getDebuggableEngine.setDebugger(new MyDebugger());
</pre>
New implementation:
<pre>
public MyDebugger implement Debugger
{
public void handleCompilationDone(Context cx,
DebuggableScript fnOrScript,
StringBuffer source)
{
}
public DebugFrame getFrame(Context cx, DebuggableScript fnOrScript)
{
return new MyDebugFrame(fnOrScript);
}
}
class MyDebugFrame implements DebugFrame
{
DebuggableScript fnOrScript;
MyDebugFrame(DebuggableScript fnOrScript)
{
this.fnOrScript = fnOrScript;
}
public void onEnter(Context cx, Scriptable activation,
Scriptable thisObj, Object[] args)
{
System.out.println("Frame entered");
}
public void onLineChange(Context cx, int lineNumber)
{
if (isBreakpoint(lineNumber)) {
System.out.println("Breakpoint hit: "+fnOrScript.getSourceName()+":"+lineNumber);
}
}
public void onExceptionThrown(Context cx, Throwable ex)
{
}
public void onExit(Context cx, boolean byThrow,
Object resultOrException)
{
System.out.println("Frame exit, result="+resultOrException);
}
private boolean isBreakpoint(int lineNumber)
{
...
}
}
...
cx.setDebugger(new MyDebugger());
</pre>
Here debugger during execution needs to decide if a particular line has breakpoint on it set or not during script execution, not at the moment of script initialization.
<p>See also Rhino Debugger that fully explore the new API:<br><tt><a href="http://lxr.mozilla.org/mozilla/source/js/rhino/toolsrc/org/mozilla/javascript/tools/debugger/Main.java">http://lxr.mozilla.org/mozilla/source/js/rhino/toolsrc/org/mozilla/javascript/tools/debugger/Main.java</a></tt>. The debugger changes includes support for debugging eval and Function scripts and loading script sources from their URL if debugger was not installed during scripts initialization.
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<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en"><html><head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (Windows NT 5.0; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java"><title>Change Log</title></head>
<body bgcolor="#ffffff">
<h1 align="center">
Rhino Change Log</h1>
This is a log of changes since the release of Rhino 1.5 Release 3.
<h3>Rhino debug API changes</h3>
A new, incompatible Rhino debug API gives an option to monitor
entering/leaving of script functions while decreasing the amount of code to
implement the API in the Rhino core. Details are available <a href="rhino15R4-debugger.html">here</a>. With the new API <a href="debugger.html">Rhino Debugger</a> provides options to break on function enter/exit, can debug scripts defined by eval and Function construction and scripts loaded prior the debugger were started.
<h3>WrapFactory introduced, WrapHandler deprecated</h3>
A design flaw in the WrapHandler interface (a call to a Java contructor from
JavaScript would result in a call to wrap the result, which would then be
cast to a Scriptable) inspired the deprecation of that interface and the
introduction of a new class, WrapFactory, that contains a new method called
on the result of a constructor call and can be customized by application if necessary.
<p>
In addition, WrapFactory has the new <tt>setJavaPrimitiveWrap</tt> method to control if instances of Java <tt>String</tt> and <tt>Number</tt> class should be wrapped to special script objects as any other Java objects so a script can access any method <tt>String</tt> and <tt>Number</tt>, or they should be converted to JavaScript primitive strings and numbers.
<h3>New security interfaces</h3>
<p>
Igor Bukanov contributed a new security implementation that allows integration with Java2 security model and prevents scripts to escape the security sandbox via eval/Function schemes.
<p>
Due to this changes SecuritySupport interface is replaced by ClassShutter and SecurityController, where ClassShutter controls which classes are visible to scripts via LiveConnect and SecurityController provides permission management. For compatibility SecuritySupport is still available as a deprecated interface but only its visibleToScripts method is used as an alias for ClassShutter.visibleToScripts. See API documentation for new classes for details.
<p>
An implementation of SecurityController that uses java policy settings to restrict script permissions based on its URL is available with Rhino shell. See the <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/toolsrc/org/mozilla/javascript/tools/shell/JavaPolicySecurity.java">JavaPolicySecurity</a> source for details. To activate it, set the <tt>rhino.use_java_policy_security</tt> system property to true when invoking Rhino shell together with installing a security manager.
<h3>Serialization chages</h3>
Due to changes in Rhino implementation and bug fixes in serialization support runtime data serialized in Rhino 1.5 Release 3 can not be read back in the Release 4.
<h3>Regular expressions improvements</h3>
Roger Lawrence provided new regular expressions implementation which fully confirms to EcmaScript 262 standard and faster.
<h3>Scripting of classes from any class loader</h3>
Christopher Oliver contributed code to allow to use the <tt>Packages</tt> object as a constructor taking a class loader argument so a script can access classes defined by that class loader. For example, to access classes from foo.jar file in the current directory, the following can be used:
<pre>
// create class loader
var loader = new java.net.URLClassLoader([new java.net.URL("file:./foo.jar")]);
// create its LiveConnect wrapper
var fooJar = new Packages(loader);
// create an instance of the class For from foo.jar
var obj = new fooJar.Foo(1, 2, 3);
obj.someMethod();
</pre>
<h3>Shell function to run external processes.</h3>
A new <tt>runCommand</tt> function is added to <a href="shell.html">Rhino Shell</a> to run external priocesses. For details, see JavaDoc for <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/toolsrc/org/mozilla/javascript/tools/shell/Global.java">org.mozilla.javascript.tools.shell.Global#runCommand</a>.
<h3>Resolved Bugzilla reports</h3>
The following Rhino reports in <a href="http://bugzilla.mozilla.org/">Bugzilla</a> where resolved for Rhino 1.5 Release 4.
<p>
<a href="http://bugzilla.mozilla.org/show_bug.cgi?id=61579">61579</a> -
context.decompileScript doesn't work.
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=72021">72021</a> -
The ScriptRuntime class tries to convert even the String values to JavaNativeObject
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=83051">83051</a> -
A function defined under a with block can't be invoked outside it
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=104089">104089</a> -
Cannot reattach context to its thread because of the bug in Context class
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=105438">105438</a> -
SourceName and lineNumbers of syntax errors in Javascript files not dispalyed.
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=106548">106548</a> -
/^.*?$/ will not match anything
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=114583">114583</a> -
script compile/decompile bug
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=114969">114969</a> -
[], [^] are valid RegExp conditions
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=115717">115717</a> -
java.lang.ArrayIndexOutOfBoundsException on with/try/finally
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=120194">120194</a> -
JS toInt32(x) conversion doesn't match ECMAScript definition
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=122167">122167</a> -
string.replace() placeholder '$1' not working
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=123439">123439</a> -
Backreferences /(a)? etc./ must hold |undefined| if not used
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=124508">124508</a> -
regexp.lastIndex should be integer-valued double, not uint32
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=124900">124900</a> -
arguments object storing duplicate parameter values
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=125562">125562</a> -
Regexp performance improvement
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=126317">126317</a> -
Crash on re.exec(str) if re.lastIndex set to certain values
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=126722">126722</a> -
(undefined === null) evaluating to true in Rhino compiled mode
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=128468">128468</a> -
java.io.NotSerializableException: org.mozilla.javascript.NativeError
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=129365">129365</a> -
Incorrect licensing in dtoa.java
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=132217">132217</a> -
delete on global function should not delete the function
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=136893">136893</a> -
Rhino treatment of |for(i in undefined)|, |for(i in null)|
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=137181">137181</a> -
delete on an arguments[i] not working correctly
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=145791">145791</a> -
ECMA conformance: Function.prototype.apply(), Function.prototype.call()
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=149285">149285</a> -
Complier does not report the correct line number on SyntaxError:Invalid assignment left-hand side.
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=151337">151337</a> -
EcmaError.getLineSource() returns 0x0 characters.
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=153223">153223</a> -
New RegExp engine in Rhino
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=154693">154693</a> -
Interpreted mode doesn't grok different functions on different objects
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=156510">156510</a> -
for (i in undefined) {} should not throw TypeError
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=157196">157196</a> -
ScriptableObject needs custom serialization implementation
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=157509">157509</a> -
No error on invalid usage of \ in identifiers
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=158159">158159</a> -
Should Rhino support octal escape sequences in regexps?
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=159334">159334</a> -
The javascript functions size is limited by a bug
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=164947">164947</a> -
Debugging unique.js produce a stack trace and erratic results
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=166530">166530</a> -
ClassCostException in FunctionObject static initializer
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=169830">169830</a> -
Array.concat(function) doesn't add function to the array
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=173180">173180</a> -
Rhino UTF-8 decoder accepts overlong sequences
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=173906">173906</a> -
Dynamic scope not working correctly with optimzation level >= 1
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=175383">175383</a> -
ArrayIndexOutOfBoundsException in string.replace()
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=177314">177314</a> -
Rhino should allow '\400' to mean ' 0'
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=179068">179068</a> -
String literals in Rhino are limited to 64K
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=179366">179366</a> -
--&gt; after whitespace after line start should mean comments to line end
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=181654">181654</a> -
Calling toString for an object derived from the Error class throws TypeError
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=181834">181834</a> -
wrong scope used for inner functions when compiling functions with dynamic scopes (interpreted only)
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=181909">181909</a> -
some regression tests for Error invalid
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=182028">182028</a> -
Calling has() in get() of a ScriptableObject causes getter function to not be called
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=184107">184107</a> -
with(...) { function f ...} should set f in the global scope
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=184111">184111</a> -
ArrayOutOfBounds Exception thrown when using Rhino Javascript Debugger
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=185165">185165</a> -
Decompilation of "\\" gives broken "\"
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=189183">189183</a> -
Debugger source frame window layering fix
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=189898">189898</a> -
Broken String.replace: "XaXY".replace("XY", "--") gives --aXY
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<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Igor Bukanov">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Rhino 1.5 Release 4.1 Change Log</title>
</head>
<body bgcolor="#ffffff">
<h1 align="center">Rhino 1.5 Release 4.1 Change Log</h1>
1.5R4.1 is a bug fix release to address mostly regressions from 1.5R3 found in 1.5R4. The only visible API change compared with 1.5R4 is two new methods in <tt>org.mozilla.javascript.Context</tt>, <tt>getApplicationClassLoader()</tt> and <tt>setApplicationClassLoader(ClasssLoader)</tt>. They allow to control the class loader Rhino uses when accessing application classes.
<p>
For differences between 1.5R4 and 1.5R3, see <a href="rhino15R4.html">1.5R4 change log</a>.
<h3>Resolved Bugzilla reports</h3>
The following Rhino reports in <a href="http://bugzilla.mozilla.org/">Bugzilla</a> where resolved for Rhino 1.5 Release 4.
<p>
<a href="http://bugzilla.mozilla.org/show_bug.cgi?id=96270">96270</a> -
Unable to create java objects from within a javascript.
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=193168">193168</a> -
Rhino debugger in v1.5R4 fails to update script source when a script is reloaded.
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=193555">193555</a> -
1.5R4 regression: function expression has no access to its name.
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=196017">196017</a> -
1.5R4 regression: script can not find classes on some versions of JDK.
<br><a href="http://bugzilla.mozilla.org/show_bug.cgi?id=200551">200551</a> -
JavaAdapter not loading a class if js.jar installed in jre/lib/ext directory.
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (WinNT; U) [Netscape]">
<title>JavaScript Runtime</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
The JavaScript Runtime</h1></center>
<h3>
Interpretation</h3>
Beginning with Rhino 1.4 Release 2, an interpretive mode is supported.
When scripts are compiled in interpretive mode, an internal representation
of the compiled form is created and stored rather than generating a Java
class. Execution proceeds by evaluating this compiled form using support
routines in Rhino.
<h3>
Compilation to Java Bytecodes</h3>
For improved performance, Rhino may compile JavaScript scripts to Java
bytecodes. The generated bytecodes in turn depend upon runtime support
routines. Each JavaScript script or function is compiled to a separate
class.
<p>Compilation of JavaScript source to class files is supported. It is
possible to specify the class files as well as the packages to generate
into.
<h3>
Types and Values</h3>
There are six fundamental types in JavaScript. These types are implemented
with the following Java types and values:
<br>&nbsp;
<br>&nbsp;
<center><table BORDER COLS=2 WIDTH="75%" >
<tr>
<td><i>JavaScript fundamental type</i></td>
<td><i>Java type</i></td>
</tr>
<tr>
<td>Undefined</td>
<td>A singleton object defined by <tt>Context.getUndefinedType()</tt></td>
</tr>
<tr>
<td>Null</td>
<td><tt>null</tt></td>
</tr>
<tr>
<td>Boolean</td>
<td><tt>java.lang.Boolean</tt></td>
</tr>
<tr>
<td>Number</td>
<td><tt>java.lang.Number</tt>, that is, any of <tt>java.lang.Byte</tt>,<tt>
java.lang.Short</tt>,<tt> java.lang.Integer</tt>,<tt> java.lang.Float</tt>,
or <tt>java.lang.Double. Not java.lang.Long, since a double representation
of a long may lose precision.</tt></td>
</tr>
<tr>
<td>String</td>
<td><tt>java.lang.String</tt></td>
</tr>
<tr>
<td>Object</td>
<td><tt>org.mozilla.javascript.Scriptable</tt></td>
</tr>
</table></center>
<p>In addition, ECMA refers to objects that implement [[Call]] as functions.
These object types are represented by implementing the Function interface.
<p>Since JavaScript is a dynamically typed language, the static Java type
of a JavaScript value is <tt>java.lang.Object</tt>.
<p>The behavior of the JavaScript engine is undefined if a value of any
type other than the ones described above is introduced into JavaScript.
(This caveat does not apply to scripts that use LiveConnect; the Java values
are wrapped and unwrapped as appropriate to conform to the above type constraints.)
<br>&nbsp;
<h3>
Property Access</h3>
Properties in JavaScript objects may be accessed using either string or
numeric identifiers. Conceptually, all accessors are converted to strings
in order to perform the lookup of the property in the object. However,
this is not the implementation used in practice because a number to string
conversion is too expensive to be performed on every array access.
<p>Instead, every property accessor method in <a href="org/mozilla/javascript/Scriptable.html">Scriptable</a>
(<tt>has</tt>, <tt>get</tt>, <tt>set</tt>, <tt>remove</tt>, <tt>getAttributes</tt>,
and <tt>setAttributes</tt>) has overloaded forms that take either a <tt>String</tt>
or an <tt>int</tt> argument. It is the responsibility of the caller to
invoke the appropriate overloaded form. For example, evaluating the expression
<tt>obj["3"]</tt>
will invoke the get(int, Scriptable) method even though the property name
was presented in the script as a string. Similarly, values of numbers that
do not fix in integers (like 1.1 and 0x100000000) must be converted to
strings.
<br>&nbsp;
<h3>
Defining Host Objects</h3>
Host objects are JavaScript objects that provide special access to the
host environment. For example, in a browser environment, the Window and
Document objects are host objects.
<p>The easiest way to define new host objects is by using <a href="org/mozilla/javascript/ScriptableObject.html#defineClass(org.mozilla.javascript.Scriptable, java.lang.Class)">ScriptableObject.defineClass()</a>.
This method defines a set of JavaScript objects using a Java class. Several
of the <a href="examples.html">examples</a> define host objects this way.
<p>If the services provided by defineClass are insufficient, try other
methods of
<a href="org/mozilla/javascript/ScriptableObject.html">ScriptableObject</a>
and
<a href="org/mozilla/javascript/FunctionObject.html">FunctionObject</a>,
such as <tt>defineProperty</tt> and <tt>defineFunctionProperties</tt>.
<br>&nbsp;
<br>&nbsp;
<h3>
Contexts and Threads</h3>
Every thread that executes JavaScript must have an associated Context.
Multiple threads (with multiple associated Contexts) may act upon the same
set of objects. Any host objects that are defined are responsible for any
sychronization required to run safely from multiple threads.
<br>&nbsp;
<p>
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<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.72 [en]C-NSCP (WinNT; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Scopes and Contexts</title>
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<h1> Scopes and Contexts</h1>
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<p>Before using Rhino in a concurrent environment, it is important to understand
the distinction between Contexts and scopes. Both are required to execute
scripts, but they play different roles. Simple embeddings of Rhino probably
won't need any of the information here, but more complicated embeddings can
gain performance and flexibility from the techniques described below. <br>
&nbsp; </p>
<h2> Contexts</h2>
The Rhino Context object is used to store thread-specific information about
the execution environment. There should be one and only one Context associated
with each thread that will be executing JavaScript.
<p>To associate the current thread with a Context, simply call the <tt>enter</tt>
method of Context: </p>
<pre>
Context cx = Context.enter();
</pre>
Once you are done with execution, simply exit the Context:
<pre>
Context.exit();
</pre>
These calls will work properly even if there is already a Context associated
with the current thread. That context will be returned and an internal counter
incremented. Only when the counter reaches zero will it be disassociated from
the thread.
<p>Remember to put the <tt>exit()</tt> call in a <tt>finally</tt> block if
you're executing code that could throw an exception. <br>
&nbsp; </p>
<h2> Scopes</h2>
A scope is a set of JavaScript objects. Execution of scripts requires a scope
for top-level script variable storage as well as a place to find standard
objects like <tt>Function</tt> and <tt>Object</tt>.
<p>It's important to understand that a scope is independent of the Context
that created it. You can create a scope using one Context and then evaluate
a script using that scope and another Context (either by exiting the current
context and entering another, or by executing on a different thread). You
can even execute scripts on multiple threads simultaneously in the same scope.
Rhino guarantees that accesses to properties of JavaScript objects are atomic
across threads, but doesn't make any more guarantees for scripts executing
in the same scope at the same time. If two scripts use the same scope simultaneously,
the scripts are responsible for coordinating any accesses to shared variables.
</p>
<p>A top-level scope is created by calling <tt>Context.initStandardObjects</tt>
to create all the standard objects: </p>
<pre>
ScriptableObject scope = cx.initStandardObjects();
</pre>
The easiest way to embed Rhino is just to create a new scope this way whenever
you need one. However, <tt>initStandardObjects</tt> is an expensive method
to call and it allocates a fair amount of memory. We'll see below that there
are ways to share a scope created this way among multiple scopes and threads.
<br>
&nbsp;
<h2> Name Lookup</h2>
So how are scopes used to look up names? In general, variables are looked
up by starting at the current variable object (which is different depending
on what code is being executed in the program), traversing its prototype chain,
and then traversing the parent chain. In the diagram below, the order in
which the six objects are traversed is indicated.
<center>
<p><img src="lookup.gif" height="194" width="500">
<br>
<i><font size="-1">Order of lookups in a two-deep scope chain with prototypes.</font></i></p>
</center>
<p>For a more concrete example, let's consider the following script: </p>
<blockquote><tt>var g = 7;</tt> <br>
<tt>function f(a) {</tt> <br>
<tt>&nbsp;&nbsp;&nbsp; var v = 8;</tt> <br>
<tt>&nbsp;&nbsp;&nbsp; x = v + a;</tt> <br>
<tt>}</tt> <br>
<tt>f(6);</tt></blockquote>
We have a top-level variable <tt>g</tt>, and the call to <tt>f</tt> will
create a new top-level variable <tt>x</tt>. All top-level variables are properties
of the scope object. When we start executing <tt>f</tt>, the scope chain
will start with the function's activation object and will end with the top-level
scope (see diagram below). The activation object has two properties, 'a'
for the argument, and 'v' for the variable. The top-level scope has properties
for the variable <tt>g</tt> and the function <tt>f</tt>.
<center>
<p><img src="scopes.gif" height="496" width="820">
<br>
<i><font size="-1">An example scope chain for a simple script.</font></i></p>
</center>
<p>When the statement <tt>x = v + a;</tt> is executed, the scope chain is
traversed looking for a 'x' property. When none is found, a new property 'x'
is created in the top-level scope. </p>
<h2> Sharing Scopes</h2>
JavaScript is a language that uses delegation rather than traditional class-based inheritance. This is a large topic in itself, but for our purposes it gives us an easy way to share a set of read-only variables across multiple scopes.
To do this we set an object's prototype. When accessing a property of an object
in JavaScript, the object is first searched for a property with the given
name. If none is found, the object's prototype is searched. This continues
until either the object is found or the end of the prototype chain is reached.
<p>So to share information across multiple scopes, we first create the object
we wish to share. Typically this object will have been created with <tt>initStandardObjects</tt>
and may also have additional objects specific to the embedding. Then all
we need to do is create a new object and call its <tt>setPrototype</tt> method
to set the prototype to the shared object, and the parent of the new scope
to null:
<pre> Scriptable newScope = cx.newObject(sharedScope);
newScope.setPrototype(sharedScope);
newScope.setParentScope(null);
</pre>
The call to <tt>newObject</tt> simply creates a new JavaScript object with
no properties. It uses the <tt>sharedScope</tt> passed in to initialize the
prototype with the standard <tt>Object.prototype</tt> value.
<p>We can now use <tt>newScope</tt> as a scope for calls to evaluate scripts.
Let's call this scope the <i>instance scope</i>. Any top-level functions or
variables defined in the script will end up as properties of the instance
scope. Uses of standard objects like <tt>Function</tt>, <tt>String</tt>, or
<tt>RegExp</tt> will find the definitions in the shared scope. Multiple
instance scopes can be defined and have their own variables for scripts yet
share the definitions in the shared scope. These multiple instance scopes
can be used concurrently. <br>
&nbsp; </p>
<h2>Sealed shared scopes</h2>
<p>The ECMAScript standard defines that scripts can add properties to all standard library objects and in many cases it is also possible to change or delete their properties as well. Such behavior may not be suitable with shared scopes since if a script by mistake adds a property to a library object from the shared scope, that object would not be garbage collected until there re active references to the shared scope potentially leading to memory leaks. In addition if a script alters some of the standard objects, the library may not work properly for other scripts. Such bugs are hard to debug and to remove a possibility for them to occur one can use seal the shared scope and all its objects.
<p>
A notion of a sealed object is a JavaScript extension supported by Rhino and it means that properties can not be added/deleted to the object and the existing object properties can not be changed. Any attempt to modify sealed object throws an exception. To seal all objects in the standard library pass <tt>true</tt> for the sealed argument when calling <tt>Context.initStandardObjects(ScriptableObject, boolean)</tt>:
<pre> ScriptableObject sealedSharedScope = cx.initStandardObjects(null, true);</pre>
This seals only all standard library objects, it does not seal the shared scope itself thus after calling <tt>initStandardObjects</tt>, <tt>sealedSharedScope</tt> cab be farther populated with application-specific objects and functions. Then after a custom initialization is done, one can seal the shared scope by calling <tt>ScriptableObject.sealObject()</tt>:
<pre> sealedSharedScope.sealObject();</pre>
Note that currently one needs to explicitly seal any additional properties he adds to the sealed shared scope since although after calling <tt>sealedSharedScope.sealObject();</tt> it would no be possible to set the additional properties to different values, one still would be able to alter the objects themselves.
<h2> Dynamic Scopes</h2>
There's one problem with the setup outlined above. Calls to functions in
JavaScript use <i>static scope</i>, which means that variables are first looked
up in the function and then, if not found there, in the lexically enclosing
scope. This causes problems if functions you define in your shared scope
need access to variables you define in your instance scope.
<p>With Rhino 1.5, it is possible to compile functions to use <i>dynamic
scope</i>. With dynamic scope, functions look at the top-level scope of the
calling function rather than their lexical scope. So we can store information
that varies across scopes in the instance scope yet still share functions
that manipulate that information reside in the shared scope. </p>
<p>The <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/DynamicScopes.java">
DynamicScopes example</a>
illustrates all the points discussed above. <br>
&nbsp; <br>
&nbsp; </p>
<h2> More on Scopes</h2>
The key things to determine in setting up scopes for your application are
<br>
(1) What scope should global variables be created in when your script executes
an assignment to an undefined variable, and <br>
(2) What variables should your script have access to when it references a
variable?
<p>The answer to (1) determines which scope should be the ultimate parent
scope: Rhino follows the parent chain up to the top and places the variable
there. After you've constructed your parent scope chain, the answer to question
(2) may indicate that there are additional scopes that need to be searched
that are not in your parent scope chain. You can add these as prototypes
of scopes in your parent scope chain. When Rhino looks up a variable, it
starts in the current scope, walks the prototype chain, then goes to the
parent scope and its prototype chain, until there are no more parent scopes
left. <br>
&nbsp; </p>
<h3>
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.7 [en] (WinNT; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Scripting Java</title>
</head>
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<script src="owner.js"></script>
<center>
<h1>
Scripting Java</h1></center>
<script>document.write(owner());</script>
<br><script>
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<center>
<hr WIDTH="100%"></center>
<p>It's possible to use Rhino just for scripting Java. You don't have to
write any additional Java code; just use the existing Rhino shell and then
make calls into Java.
<br>&nbsp;
<h2>
Rhino Shell</h2>
The Rhino shell allows you to run scripts from files or interactively at
a command line.
<p>If you download the zip file for rhino, it will contain a single JAR
file, <tt>js.jar</tt>. If you add the JAR file to your class path, you
can start the Rhino shell using the command
<pre>&nbsp;&nbsp;&nbsp; java org.mozilla.javascript.tools.shell.Main</pre>
or if you have Java 2 (JDK 1.2 or greater), you can avoid changing your classpath
and simply use the command
<pre>&nbsp;&nbsp;&nbsp; java -jar js.jar</pre>
Unfortunately the <tt>-jar</tt> option to <tt>java</tt> will overwrite
your existing classpath. The shell's interactive mode is a good way to
begin exploring Rhino.
<p><i>Note: Earlier versions of Rhino have two JAR files, js.jar and jstools.jar,
and don't support the -jar option. Both JAR files must be added to the
class path to start the shell</i>.
<p>You can execute a JavaScript file by putting the file name as an argument
to the shell class:
<pre>&nbsp;&nbsp;&nbsp; java org.mozilla.javascript.tools.shell.Main myScript.js</pre>
There are a number of options for evaluating scripts using the shell. See
the <a href="http://www.mozilla.org/rhino/shell.html">command description</a>
for more information.
<br>&nbsp;
<h2>
LiveConnect: Communicating with Java from JavaScript</h2>
If you are planning to script Java using Rhino, you'll want to use LiveConnect,
which allows you to create Java classes and call Java methods from within
JavaScript. For example, here's a log from an interactive session. If you
type it in, you'll see a window with a button filling it.
<center>
<p><img SRC="scriptjavaframe.jpg" height=100 width=200>
<br><i><font size=-1>A Java frame created from the Rhino shell.</font></i></center>
<pre>$ java org.mozilla.javascript.tools.shell.Main
js> importPackage(java.awt);
js> frame = new Frame("JavaScript")
java.awt.Frame[frame0,0,0,0x0,invalid,hidden,layout=java.awt.BorderLayout,resizable,title=JavaScript]
js> frame.show()
js> frame.setSize(new Dimension(200,100))
js> button = new Button("OK")
java.awt.Button[button0,0,0,0x0,invalid,label=OK]
js> frame.add(button)
java.awt.Button[button0,0,0,0x0,invalid,label=OK]
js> frame.show()
js> quit()
$</pre>
If you wish to load classes from JavaScript that aren't in the <tt>java</tt>
package, you'll need to prefix the package name with "<tt>Packages.</tt>".
For example:
<pre>$ java org.mozilla.javascript.tools.shell.Main
js> cx = Packages.org.mozilla.javascript.Context.enter()
org.mozilla.javascript.Context@25980b44
js> cx.evaluateString(this, "3+2", null, 0, null)
5.0
js> quit()
$</pre>
<h2>
Accessing JavaBean Properties</h2>
Java classes can define JavaBean properties using getter and setter methods.
For example, the following class defines two properties:
<p><tt>public class Me {</tt>
<br><tt>&nbsp;&nbsp;&nbsp; public int getAge() { return age; }</tt>
<br><tt>&nbsp;&nbsp;&nbsp; public void setAge(int anAge) { age = anAge;
}</tt>
<br><tt>&nbsp;&nbsp;&nbsp; public String getSex() { return "male"; }</tt>
<br><tt>&nbsp;&nbsp;&nbsp; private int age;</tt>
<br><tt>};</tt>
<p>The two properties defined are <i>age</i> and <i>sex</i>. The <i>sex</i>
property is read-only: it has no setter.
<p>Using Rhino we can access the bean properties as if they where JavaScript
properties. We can also continue to call the methods that define the property.
<p><tt>js> me = new Packages.Me();</tt>
<br><tt>Me@93</tt>
<br><tt>js> me.getSex()</tt>
<br><tt>male</tt>
<br><tt>js> me.sex</tt>
<br><tt>male</tt>
<br><tt>js> me.age = 33;</tt>
<br><tt>33</tt>
<br><tt>js> me.age</tt>
<br><tt>33</tt>
<br><tt>js> me.getAge()</tt>
<br><tt>33</tt>
<br><tt>js></tt>
<p>Since the <i>sex</i> property is read-only, we are not allowed to write
to it.
<p><i>Note: JavaBean reflection is not available in versions of Rhino before
1.5.</i>
<br><tt></tt>&nbsp;
<h2>
Importing Java Classes and Packages</h2>
Above we saw the use of the <tt>importPackage</tt> function to import all
the classes from a particular Java package. There is also <tt>importClass</tt>,
which imports a single class:
<pre>$ java org.mozilla.javascript.tools.shell.Main
js> importClass(Packages.org.mozilla.javascript.Context)
js> cx = Context.enter()
org.mozilla.javascript.Context@25980d62
js> cx.evaluateString(this, "3+2", null, 0, null)
5.0
js> quit()
$</pre>
<h2>
Extending Java Classes and Implementing Java Interfaces with JavaScript</h2>
Starting from the example above of creating a Java frame using JavaScript,
we can add a listener for the button. Once we call <tt>addActionListener</tt>
we can then click on the button to get the current date printed out:
<pre>$ java org.mozilla.javascript.tools.shell.Main
js> importPackage(java.awt);
js> frame = new Frame("JavaScript")
java.awt.Frame[frame0,0,0,0x0,invalid,hidden,layout=java.awt.BorderLayout,resizable,title=JavaScript]
js> button = new Button("OK")
java.awt.Button[button0,0,0,0x0,invalid,label=OK]
js> frame.setSize(new Dimension(200,100))
js> frame.add(button)
java.awt.Button[button0,0,0,0x0,invalid,label=OK]
js> frame.show()
js> function printDate() { print(new Date()) }
js> printDate()
Wed Mar 15 15:42:20 GMT-0800 (PST) 2000
js> o = { actionPerformed: printDate }
[object Object]
js> o.actionPerformed()
Wed Mar 15 15:42:39 GMT-0800 (PST) 2000
js> buttonListener = java.awt.event.ActionListener(o)
adapter0@6acc0f66
js>&nbsp; button.addActionListener(buttonListener)
js> Wed Mar 15 15:43:05 GMT-0800 (PST) 2000
Wed Mar 15 15:43:05 GMT-0800 (PST) 2000
Wed Mar 15 15:43:08 GMT-0800 (PST) 2000
quit()
$</pre>
When we type <tt>buttonListener = java.awt.event.ActionListener(o)</tt>,
Rhino actually creates a new Java class that implements <tt>ActionListener</tt>
and forwards calls from that class to the JavaScript object. So when you
click on the button, the <tt>printDate</tt> method is called.
<p>
Starting from the release 1.5R5 Rhino allows to pass JavaScript functions directly to Java methods if the corresponding argument is Java interface with single method. It allows to pass <tt>printDate</tt> directly to <tt>addActionListener</tt> and simplifies example:
<pre>$ java org.mozilla.javascript.tools.shell.Main
js> importPackage(java.awt);
js> frame = new Frame("JavaScript")
java.awt.Frame[frame0,0,0,0x0,invalid,hidden,layout=java.awt.BorderLayout,title=JavaScript,resizable,normal]
js> button = new Button("OK")
java.awt.Button[button0,0,0,0x0,invalid,label=OK]
js> frame.setSize(new Dimension(200,100))
js> frame.add(button)
java.awt.Button[button0,0,0,0x0,invalid,label=OK]
js> frame.show()
js> function printDate() { print(new Date()) }
js> printDate()
Mon Oct 27 2003 10:35:44 GMT+0100 (CET)
js> button.addActionListener(printDate)
js> Mon Oct 27 2003 10:36:09 GMT+0100 (CET)
Mon Oct 27 2003 10:36:10 GMT+0100 (CET)
quit()
$</pre>
<h2>
JavaAdapter constructor</h2>
Another way to create a JavaAdapter is to call the JavaAdapter constructor
explicitly. Using the JavaAdapter constructor gives you additional features
that cannot be had by "constructing" a Java interface as was done above.
<p>Instead of writing
<pre>&nbsp;&nbsp;&nbsp; buttonListener = java.awt.event.ActionListener(o)</pre>
above we can also write
<pre>&nbsp;&nbsp;&nbsp; buttonListener = new JavaAdapter(java.awt.event.ActionListener, o)</pre>
which is equivalent. If we also wanted to extend class <tt>Foo</tt>, while
also implementing <tt>java.lang.Runnable</tt>, we would write
<pre>&nbsp;&nbsp;&nbsp; buttonListener = new JavaAdapter(Packages.Foo,&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; java.awt.event.ActionListener,
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; java.lang.Runnable, o)</pre>
In general the syntax is
<p>&nbsp;&nbsp;&nbsp; <tt>new JavaAdapter(</tt><i>java-class</i>, [<i>java-class</i>,
...] <i>javascript-object</i><tt>)</tt>
<p>where at most one <i>java-class</i> is a Java class and the remaining
<i>java-class</i>es
are interfaces. The result will be a Java adapter that extends any specified
Java class, implements the Java interfaces, and forwards any calls to the
methods of the <i>javascript-object</i>.
<h3>
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.72 [en]C-NSCP (WinNT; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Serialization</title>
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<script src="owner.js"></script>
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<h1>Serialization</h1>
</center>
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<center>
<hr width="100%"></center>
<p>Beginning with Rhino 1.5 Release 3 it is possible to serialize JavaScript
objects, including functions and scripts. However, &nbsp;serialization of
code in compilation mode has some significant limitations.. Serialization
provides a way to save the state of an object and write it out to a file
or send it across a network connection. <br>
&nbsp; </p>
<h2>Simple serialization example</h2>
The Rhino shell has two new top-level functions, serialize and deserialize.
They're intended mainly as examples of the use of serialization:<br>
<pre>$&nbsp;java org.mozilla.javascript.tools.shell.Main<br>js&gt; function f() { return 3; }<br>js&gt; serialize(f, "f.ser")<br>js&gt; quit()<br><br>$&nbsp;java org.mozilla.javascript.tools.shell.Main<br>js&gt; f = deserialize("f.ser")<br><br>function f() {<br> return 3;<br>}<br><br>js&gt; f()<br>3<br>js&gt;</pre>
<pre></pre>
<pre></pre>
<pre></pre>
<pre></pre>
<pre></pre>
<pre></pre>
<pre></pre>
<pre></pre>
<pre></pre>
Here we see a simple case of a function being serialized to a file and then
read into a new instance of Rhino and called. <br>
<br>
<h2>Rhino serialization APIs</h2>
Two new classes, ScriptableOutputStream and ScriptableInputStream, were introduced
to handle serialization of Rhino classes. These classes extend ObjectOutputStream
and ObjectInputStream respectively. Writing an object to a file can be done
in a few lines of Java code:<br>
<pre>FileOutputStream fos = new FileOutputStream(filename);<br>ScriptableOutputStream out = new ScriptableOutputStream(fos, scope);<br>out.writeObject(obj);<br>out.close();</pre>
<p>Here filename is the file to write to, obj is the object or function to
write, and scope is the top-level scope containing obj.&nbsp;</p>
<p>Reading the serialized object back into memory is similarly simple:</p>
<pre>FileInputStream fis = new FileInputStream(filename);<br>ObjectInputStream in = new ScriptableInputStream(fis, scope);<br>Object deserialized = in.readObject();<br>in.close();<br></pre>
<p>Again, we need the scope to create our serialization stream class. </p>
<p>So why do we need these specialized stream classes instead of simply using
ObjectOutputStream and ObjectInputStream? To understand the answer we must
know what goes on behind the scenes when Rhino serializes objects. </p>
<h2>How Rhino serialization works</h2>
By default, Java serialization of an object also serializes objects that
are referred to by that object. Upon deserialization the initial object and
the objects it refers to are all created and the references between the objects
are resolved. <br>
<br>
However, for JavaScript this creates a problem. JavaScript objects contain
references to prototypes and to parent scopes. Default serialization would
serialize the object or function we desired but would also serialize Object.prototype
or even possibly the entire top-level scope and everything it refers to!
We want to be able to serialize a JavaScript object and then deserialize
it into a new scope and have all of the references from the deserialized
object to prototypes and parent scopes resolved correctly to refer to objects
in the new scope. <br>
<br>
ScriptableOutputStream takes a scope as a parameter to its constructor. If
in the process of serialization it encounters a reference to the scope it
will serialize a marker that will be resolved to the new scope upon deserialization.
It is also possible to add names of objects to a list in the ScriptableOutputStream
object. These objects will also be saved as markers upon serialization and
resolved in the new scope upon deserialization. Use the addExcludedName method
of ScriptableOutputStream to add new names. By default, ScriptableOutputStream
excludes all the names defined using Context.initStandardObjects.<br>
<br>
If you are using Rhino serialization in an environment where you always define,
say, a constructor "Foo", you should add the following code before calling
writeObject:<br>
<pre>out.addExcludedName("Foo");<br>out.addExcludedName("Foo.prototype");<br></pre>
This code will prevent Foo and Foo.prototype from being serialized and will
cause references to Foo or Foo.prototype to be resolved to the objects in
the new scope upon deserialization. Exceptions will be thrown if Foo or Foo.prototype
cannot be found the scopes used in either ScriptableOutputStream or ScriptableInputStream.<br>
<br>
<h2>Rhino serialization in compilation mode</h2>
Serialization works well with objects and with functions and scripts in
interpretive mode. However, you can run into problems with serialization
of compiled functions and scripts:<br>
<pre>$&nbsp;cat test.js<br>function f() { return 3; }<br>serialize(f, "f.ser");<br>g = deserialize("f.ser");<br>print(g());<br>$&nbsp;java&nbsp;org.mozilla.javascript.tools.shell.Main -opt -1 test.js<br>3<br>$&nbsp;java&nbsp;org.mozilla.javascript.tools.shell.Main test.js<br>js: uncaught JavaScript exception: java.lang.ClassNotFoundException: c1<br></pre>
<p>The problem is that Java serialization has no built-in way to serialize
Java classes themselves. (It might be possible to save the Java bytecodes
in an array and then load the class upon deserialization, but at best that
would eat up a lot of memory for just this feature.) One way around this
is to compile the functions using the jsc tool: </p>
<pre>$&nbsp;cat f.js<br>function f() { return 3; }<br>$&nbsp;java -classpath js.jar org.mozilla.javascript.tools.jsc.Main f.js<br>$&nbsp;cat test2.js<br>loadClass("f");<br>serialize(f, "f.ser");<br>g = deserialize("f.ser");<br>print(g());<br>$&nbsp;java -classpath 'js.jar;.' org.mozilla.javascript.tools.shell.Main test2.js<br>3<br></pre>
<p>&nbsp;Now the function f is compiled to a Java class, but that class is
then made available in the classpath so serialization works. This isn't that
interesting an example since compiling a function to a class and then loading
it accomplishes the same as serializing an interpreted function, but it becomes
more relevant if you wish to serialize JavaScript objects that have references
to compiled functions. </p>
<h3>
<hr width="100%"><br>
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.7 [en]C-NSCP (WinNT; U) [Netscape]">
<title>JavaScript Shell</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
JavaScript Shell</h1></center>
The JavaScript shell provides a simple way to run scripts in batch mode
or an interactive environment for exploratory programming.
<h2>
Invoking the Shell</h2>
<tt>java org.mozilla.javascript.tools.shell.Main [<i>options</i>]
<i>script-filename-or-url</i> [<i>script-arguments</i>]</tt>
<p>where <tt><i>options</i></tt> are:
<p><tt>-e <i>script-source</i></tt>
<blockquote>Executes <i>script-source</i> as a JavaScript script.</blockquote>
<tt>-f <i>script-filename-or-url</i></tt>
<blockquote>Reads <i>script-filename-or-url</i> content and execute it as a JavaScript script.</blockquote>
<tt>-opt <i>optLevel</i></tt>
<br><tt>-O <i>optLevel</i></tt>
<ul>Optimizes at level <i>optLevel</i>, which must be an integer between
0 and 9. See <a href="opt.html">Optimization</a> for more details.</ul>
<tt>-version <i>versionNumber</i></tt>
<ul>Specifies the language version to compile with. The string <i>versionNumber</i>
must be one of <tt>100</tt>, <tt>110</tt>, <tt>120</tt>, <tt>130</tt>,
or <tt>140</tt>. See <a href="overview.html#versions">JavaScript Language
Versions</a> for more information on language versions.</ul>
If the shell is invoked with the system property rhino.use_java_policy_security set to true and with a security manager installed, the shell restricts scripts permissions based on their URLs according to Java policy settings. This is available only if JVM implements Java2 security model.
<h2>
Predefined Properties</h2>
Scripts executing in the shell have access to some additional properties
of the top-level object.
<br>&nbsp;
<h4>
arguments</h4>
<blockquote>The <tt>arguments</tt> object is an array containing the strings
of all the arguments given at the command line when the shell was invoked.</blockquote>
<h4>
help()</h4>
<blockquote>Executing the help function will print usage and help messages.</blockquote>
<h4>
defineClass(<i>className</i>)</h4>
<blockquote>Define an extension using the Java class named with the string
argument <i>className</i>. Uses ScriptableObject.defineClass() to define
the extension.</blockquote>
<h4>
deserialize(<i>filename</i>)</h4>
<blockquote>Restore from the specified file an object previously written by a call to <tt>serialize</tt>.</blockquote>
<h4>
load([<i>filename</i>, ...])</h4>
<blockquote>Load JavaScript source files named by string arguments. If
multiple arguments are given, each file is read in and executed in turn.</blockquote>
<h4>
loadClass(<i>className</i>)</h4>
<blockquote>Load and execute the class named by the string argument <i>className</i>.
The class must be a class that implements the Script interface, as will
any script compiled by <a href="jsc.html">jsc</a>.</blockquote>
<h4>
print([<i>expr</i> ...])</h4>
<blockquote>Evaluate and print expressions. Evaluates each expression,
converts the result to a string, and prints it.</blockquote>
<h4>
readFile(<i>path</i> [, <i>characterCoding</i>)</h4>
<blockquote>Read given file and convert its bytes to a string using the
specified character coding or default character coding if explicit coding
argument is not given.</blockquote>
<h4>
readUrl(<i>url</i> [, <i>characterCoding</i>)</h4>
<blockquote>Open an input connection to the given string url, read all its
bytes and convert them to a string using the specified character coding or
default character coding if explicit coding argument is not given.</blockquote>
<h4>
runCommand(<i>commandName</i>, [<i>arg</i>, ...] [<i>options</i>])</h4>
<blockquote>Execute the specified command with the given argument and options
as a separate process and return the exit status of the process. For details, see JavaDoc for <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/toolsrc/org/mozilla/javascript/tools/shell/Global.java">org.mozilla.javascript.tools.shell.Global#runCommand</a>.</blockquote>
<h4>
serialize(<i>object</i>, <i>filename</i>)</h4>
<blockquote>Serialize the given object to the specified file.</blockquote>
<h4>
spawn(<i>functionOrScript</i>)</h4>
<blockquote>Run the given function or script in a different thread.</blockquote>
<h4>
sync(<i>function</i>)</h4>
<blockquote>creates a synchronized function (in the sense of a Java synchronized method) from an existing function. The new function synchronizes on the <code>this</code> object of its invocation.</blockquote>
<h4>
quit()</h4>
<blockquote>Quit shell. The shell will also quit in interactive mode if
an end-of-file character is typed at the prompt.</blockquote>
<h4>
version([<i>number</i>])</h4>
<blockquote>Get or set JavaScript version number. If no argument is supplied,
the current version number is returned. If an argument is supplied, it
is expected to be one of <tt>100</tt>, <tt>110</tt>, <tt>120</tt>, <tt>130,</tt>
or <tt>140</tt> to indicate JavaScript version 1.0, 1.1, 1.2, 1.3, or 1.4
respectively.</blockquote>
<h2>
Example</h2>
<h4>Invocation</h4>
Here the shell is invoked three times from the command line. (The system
command prompt is shown as <tt>$</tt>.) The first invocation executes a
script specified on the command line itself. The next invocation has no
arguments, so the shell goes into interactive mode, reading and evaluating
each line as it is typed in. Finally, the last invocation executes a script
from a file and accesses arguments to the script itself.
<pre>
$ java org.mozilla.javascript.tools.shell.Main -e print('hi')
hi
$ java org.mozilla.javascript.tools.shell.Main
js> print('hi')
hi
js> 6*7
42
js> function f() {
return a;
}
js> var a = 34;
js> f()
34
js> quit()
$ cat echo.js
for (i in arguments) {
print(arguments[i])
}
$ java org.mozilla.javascript.tools.shell.Main echo.js foo bar
foo
bar
$
</pre>
<h4>spawn and sync</h4>
The following example creates 2 threads via <tt>spawn</tt> and uses <tt>sync</tt> to create a synchronized version of the function <tt>test</tt>.
<pre>
js> function test(x) {
print("entry");
java.lang.Thread.sleep(x*1000);
print("exit");
}
js> var o = { f : sync(test) };
js> spawn(function() {o.f(5);});
Thread[Thread-0,5,main]
entry
js> spawn(function() {o.f(5);});
Thread[Thread-1,5,main]
js>
exit
entry
exit
</pre>
<h4>runCommand</h4>
Here is few examples of invoking <tt>runCommand</tt> under Linux.
<pre>
js> runCommand('date')
Thu Jan 23 16:49:36 CET 2003
0
// Using input option to provide process input
js> runCommand("sort", {input: "c\na\nb"})
a
b
c
0
js> // Demo of output and err options
js> var opt={input: "c\na\nb", output: 'Sort Output:\n'}
js> runCommand("sort", opt)
0
js> print(opt.output)
Sort Output:
a
b
c
js> var opt={input: "c\na\nb", output: 'Sort Output:\n', err: ''}
js> runCommand("sort", "--bad-arg", opt)
2
js> print(opt.err)
/bin/sort: unrecognized option `--bad-arg'
Try `/bin/sort --help' for more information.
js> runCommand("bad_command", "--bad-arg", opt)
js: "<stdin>", line 18: uncaught JavaScript exception: java.io.IOException: bad_command: not found
js> // Passing explicit environment to the system shell
js> runCommand("sh", "-c", "echo $env1 $env2", { env: {env1: 100, env2: 200}})
100 200
0
js> // Use args option to provide additional command arguments
js> var arg_array = [1, 2, 3, 4];
js> runCommand("echo", { args: arg_array})
1 2 3 4
0
</pre>
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.7 [en]C-NSCP (WinNT; U) [Netscape]">
<title>JavaScript Tools</title>
</head>
<body bgcolor="#FFFFFF">
<center>
<h1>
JavaScript Tools</h1></center>
<h2>
JavaScript shell</h2>
The <a href="shell.html">JavaScript shell</a> allows for interactive and
batch execution of JavaScript scripts.
<br>&nbsp;
<br>&nbsp;
<br>&nbsp;
<h2>
JavaScript compiler</h2>
The <a href="jsc.html">JavaScript compiler</a> translates JavaScript source
into Java class files.
<br>&nbsp;
<p>
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 97">
<meta name="GENERATOR" content="Mozilla/4.75 [en] (WinNT; U) [Netscape]">
<title>Embedding Rhino</title>
</head>
<body>
<center><font size=+4>Tutorial: Embedding Rhino</font></center>
<p>Embedding Rhino can be done simply with good results. With more effort
on the part of the embedder, the objects exposed to scripts can be customized
further.
<p>This tutorial leads you through the steps from a simple embedding to
more customized, complex embeddings. Fully compilable examples are provided
along the way.
<p>The examples live in the <tt>rhino/examples</tt> directory in the distribution
and in <tt>mozilla/js/rhino/examples</tt> in cvs. This document will link
to them using <a href="http://lxr.mozilla.org/">lxr</a>.
<p>In this document, JavaScript code will be in <font color="#006600">green</font>,
Java code will be in <font color="#006600">green</font>, and shell logs
will be in <font color="#663366">purple</font>.
<h3>
<font size=+3>Contents</font></h3>
<ul>
<li>
<font size=+1><a href="#RunScript">RunScript: A simple embedding</a></font></li>
<ul>
<li>
<font size=+1><a href="#EnteringContext">Entering a Context</a></font></li>
<li>
<font size=+1><a href="#initializing">Initializing standard objects</a></font></li>
<li>
<font size=+1><a href="#Collecting">Collecting the arguments</a></font></li>
<li>
<font size=+1><a href="#Evaluating">Evaluating a script</a></font></li>
<li>
<font size=+1><a href="#Print">Print the result</a></font></li>
<li>
<font size=+1><a href="#Exit">Exit the Context</a></font></li>
</ul>
<li>
<font size=+1><a href="#Expose">Expose Java APIs</a></font></li>
<ul>
<li>
<font size=+1><a href="#UseJava">Use Java APIs</a></font></li>
<li>
<font size=+1><a href="#ImplementingInterfaces">Implementing interfaces</a></font></li>
<li>
<font size=+1><a href="#AddJava">Add Java objects</a></font></li>
</ul>
<li>
<font size=+1><a href="#UsingJSObjs">Using JavaScript objects from Java</a></font></li>
<ul>
<li>
<font size=+1><a href="#UsingJSvars">Using JavaScript variables</a></font></li>
<li>
<font size=+1><a href="#CallingJSfuns">Calling JavaScript functions</a></font></li>
</ul>
<li>
<font size=+1><a href="#JavaScriptHostObjects">JavaScript host objects</a></font></li>
<ul>
<li>
<font size=+1><a href="#DefiningHostObjects">Defining Host Objects</a></font></li>
<li>
<font size=+1><a href="#Counter">Counter example</a></font></li>
<ul>
<li>
<font size=+1><a href="#CounterCtors">Counter's constructors</a></font></li>
<li>
<font size=+1><a href="#classname">Class name</a></font></li>
<li>
<font size=+1><a href="#Dynamic">Dynamic properties</a></font></li>
<li>
<font size=+1><a href="#DefiningMethods">Defining JavaScript "methods"</a></font></li>
<li>
<font size=+1><a href="#AddingCounter">Adding Counter to RunScript</a></font></li>
</ul>
</ul>
</ul>
<hr WIDTH="100%">
<br><a NAME="RunScript"></a><font size=+3>RunScript: A simple embedding</font>
<p>About the simplest embedding of Rhino possible is the <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/RunScript.java">RunScript
example</a>. All it does it read a script from the command line, execute
it, and print a result.
<p>Here's an example use of RunScript from a shell command line:
<blockquote>
<pre><font color="#663366">$ java RunScript "Math.cos(Math.PI)"
-1
$ java RunScript 'function f(x){return x+1} f(7)'
8</font></pre>
</blockquote>
Note that you'll have to have both the Rhino classes and the RunScript
example class file in the classpath. Let's step through the body of <tt>main</tt>
one line at time.
<p><a NAME="EnteringContext"></a><font size=+2>Entering a Context</font>
<p>The code
<blockquote>
<pre><font color="#006600">Context cx = Context.enter();</font></pre>
</blockquote>
Creates and enters a <tt>Context. </tt>A <tt>Context</tt> stores information
about the execution environment of a script.
<br>&nbsp;
<p><a NAME="initializing"></a><font size=+2>Initializing standard objects</font>
<p>The code
<blockquote>
<pre><font color="#006600">Scriptable scope = cx.initStandardObjects();</font></pre>
</blockquote>
Initializes the standard objects (<tt>Object</tt>,
<tt>Function</tt>, etc.)
This must be done before scripts can be executed. The <tt>null</tt> parameter
tells <tt>initStandardObjects</tt> to create and return a scope object
that we use in later calls.
<p><a NAME="Collecting"></a><font size=+2>Collecting the arguments</font>
<p>This code is standard Java and not specific to Rhino. It just collects
all the arguments and concatenates them together.
<blockquote>
<pre style="color: #006600">
String s = "";
for (int i=0; i &lt; args.length; i++) {
s += args[i];
}
</pre>
</blockquote>
<p><br><a NAME="Evaluating"></a><font size=+2>Evaluating a script</font>
<p>The code
<blockquote>
<pre><font color="#006600">Object result = cx.evaluateString(scope, s, "&lt;cmd>", 1, null);</font></pre>
</blockquote>
uses the Context <tt>cx</tt> to evaluate a string. Evaluation of the script
looks up variables in <tt>scope</tt>, and errors will be reported with
the filename <tt>&lt;cmd></tt> and line number 1.
<br>&nbsp;
<p><a NAME="Print"></a><font size=+2>Print the result</font>
<p>The code
<blockquote>
<pre><font color="#006600">System.out.println(cx.toString(result));</font></pre>
</blockquote>
prints the result of evaluating the script (contained in the variable <tt>result</tt>).
<tt>result</tt>
could be a string, JavaScript object, or other values..The
<tt>toString</tt>
method converts any JavaScript value to a string.
<br>&nbsp;
<p><a NAME="Exit"></a><font size=+2>Exit the Context</font>
<p>The code
<blockquote>
<pre style="color: #006600">
} finally {
Context.exit();
}
</pre>
</blockquote>
exits the Context. This removes the association between the Context and
the current thread and is an essential cleanup action. There should be
a call to <tt>exit</tt> for every call to <tt>enter</tt>. To make sure that it is called even if an exception is thrown, it is put into the finally block corresponding to the try block starting after <tt>Context.enter()</tt>.
<br>&nbsp;
<dir>&nbsp;</dir>
<a NAME="Expose"></a><font size=+3>Expose Java APIs</font>
<p><a NAME="UseJava"></a><font size=+2>Use Java APIs</font>
<p>No additional code in the embedding needed! The JavaScript feature called
<i>LiveConnect</i>
allows JavaScript programs to interact with Java objects:
<dir><tt><font color="#663366">$ java RunScript 'java.lang.System.out.println(3)'</font></tt>
<br><tt><font color="#663366">3.0</font></tt>
<br><tt><font color="#663366">undefined</font></tt></dir>
<a NAME="ImplementingInterfaces"></a><font size=+2>Implementing interfaces</font>
<p>Using Rhino, JavaScript objects can implement arbitrary Java interfaces.
There's no Java code to write--it's part of Rhino's LiveConnect implementation.
For example, we can see how to implement java.lang.Runnable in a Rhino
shell session:
<blockquote>
<pre><font color="#663366">js> obj = { run: function() { print('hi'); } }
[object Object]
js> obj.run()
hi
js> r = new java.lang.Runnable(obj);
[object Object]
js> t = new java.lang.Thread(r)
Thread[Thread-0,5,main]
js> t.start()
hi</font></pre>
</blockquote>
<a NAME="AddJava"></a><font size=+2>Add Java objects</font>
<p>The next example is <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/RunScript2.java">RunScript2</a>.
This is the same as RunScript, but with the addition of two extra lines
of code:
<dir><tt><font color="#006600">Scriptable jsArgs = Context.toObject(System.out,
scope);</font></tt>
<br><tt><font color="#006600">scope.put("out", scope, jsArgs);</font></tt></dir>
These lines add a global variable <tt>out</tt> that is a JavaScript reflection
of the <tt>System.out</tt> variable:
<dir><tt><font color="#663366">$ java RunScript2 'out.println(42)'</font></tt>
<br><tt><font color="#663366">42.0</font></tt>
<br><tt><font color="#663366">undefined</font></tt></dir>
<p><br><a NAME="UsingJSObjs"></a><font size=+3>Using JavaScript objects
from Java</font>
<p>After evaluating a script it's possible to query the scope for variables
and functions, extracting values and calling JavaScript functions. This
is illustrated in the <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/RunScript3.java">RunScript3</a>
example. This example adds the ability to print the value of variable <tt>x</tt>
and the result of calling function <tt>f</tt>. Both <tt>x</tt> and <tt>f</tt>
are expected to be defined by the evaluated script. For example,
<blockquote>
<pre style="color: #663366">
$ java RunScript3 'x = 7'
x = 7
f is undefined or not a function.
$ java RunScript3 'function f(a) { return a; }'
x is not defined.
f('my args') = my arg
</pre>
</blockquote>
<a NAME="UsingJSvars"></a><font size=+2>Using JavaScript variables</font>
<p>To print out the value of <tt>x</tt>, we add the following code.
<blockquote>
<pre style="color: #006600">
Object x = scope.get("x", scope);
if (x == Scriptable.NOT_FOUND) {
System.out.println("x is not defined.");
} else {
System.out.println("x = " + Context.toString(x));
}
</pre>
</blockquote>
<a NAME="CallingJSfuns"></a><font size=+2>Calling JavaScript functions</font>
<p>To get the function <tt>f</tt>, call it, and print the result, we add
this code:
<blockquote>
<pre style="color: #006600">
Object fObj = scope.get("f", scope);
if (!(fObj instanceof Function)) {
System.out.println("f is undefined or not a function.");
} else {
Object functionArgs[] = { "my arg" };
Function f = (Function)fObj;
Object result = f.call(cx, scope, scope, functionArgs);
String report = "f('my args') = " + Context.toString(result);
System.out.println(report);
}
</pre>
</blockquote>
<p><br><a NAME="JavaScriptHostObjects"></a><font size=+3>JavaScript host
objects</font>
<p><a NAME="DefiningHostObjects"></a><font size=+2>Defining Host Objects</font>
<p>Custom host objects can implement special JavaScript features like dynamic
properties.
<p><a NAME="Counter"></a><font size=+2>Counter example</font>
<p>The <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/Counter.java">Counter
example</a> is a simple host object. We'll go through it method by method
below.
<p>It's easy to try out new host object classes in the shell using its
built-in <tt>defineClass</tt> function. We'll see how to add it to RunScript
later. (Note that because the <tt>java -jar</tt> option preempts the rest
of the classpath, we can't use that and access the <tt>Counter</tt> class.)
<blockquote>
<pre style="color: #663366">
$ java -cp 'js.jar;examples' org.mozilla.javascript.tools.shell.Main
js> defineClass("Counter")
js> c = new Counter(7)
[object Counter]
js> c.count
7
js> c.count
8
js> c.count
9
js> c.resetCount()
js> c.count
0
</pre>
</blockquote>
<a NAME="CounterCtors"></a><font size=+2>Counter's constructors</font>
<p>The zero-argument constructor is used by Rhino runtime to create instances.
For the counter example, no initialization work is needed, so the implementation
is empty.
<dir><tt><font color="#006600">public Counter () { }</font></tt></dir>
The method <tt>jsConstructor</tt> defines the JavaScript constructor that
was called with the expression <tt>new Counter(7)</tt> in the JavaScript
code above.
<dir><tt><font color="#006600">public void jsConstructor(int a) { count
= a; }</font></tt></dir>
<a NAME="classname"></a><font size=+2>Class name</font>
<p>The class name is defined by the <tt>getClassName</tt> method. This
is used to determine the name of the constructor.
<dir><tt><font color="#006600">public String getClassName() { return "Counter";
}</font></tt></dir>
<a NAME="Dynamic"></a><font size=+2>Dynamic properties</font>
<p>Dynamic properties are defined by methods beginning with <tt>jsGet_</tt>
or <tt>jsSet_</tt>. The method <tt>jsGet_count</tt> defines the <i>count</i>
property.
<dir><tt><font color="#006600">public int jsGet_count() { return count++;
}</font></tt></dir>
The expression <tt>c.count</tt> in the JavaScript code above results in
a call to this method.
<p><a NAME="DefiningMethods"></a><font size=+2>Defining JavaScript "methods"</font>
<p>Methods can be defined using the <tt>jsFunction_ prefix</tt>. Here we
define <tt>resetCount</tt> for JavaScript.
<dir><tt><font color="#006600">public void jsFunction_resetCount() { count
= 0; }</font></tt></dir>
The call <tt>c.resetCount()</tt> above calls this method.
<p><a NAME="AddingCounter"></a><font size=+2>Adding Counter to RunScript</font>
<p>Now take a look at the <a href="http://lxr.mozilla.org/mozilla/source/js/rhino/examples/RunScript4.java">RunScript4
example</a>. It's the same as RunScript except for two additions. The method
<tt>ScriptableObject.defineClass</tt>
uses a Java class to define the Counter "class" in the top-level scope:
<dir><tt><font color="#006600">ScriptableObject.defineClass(scope, Counter.class);</font></tt></dir>
Now we can reference the <tt>Counter</tt> object from our script:
<dir><tt><font color="#663366">$ java RunScript4 'c = new Counter(3); c.count;
c.count;'</font></tt>
<br><tt><font color="#663366">4</font></tt></dir>
It also creates a new instance of the <tt>Counter</tt> object from within
our Java code, constructing it with the value 7, and assigning it to the
top-level variable <tt>myCounter</tt>:
<blockquote>
<pre style="color: #006600">
Object[] arg = { new Integer(7) };
Scriptable myCounter = cx.newObject(scope, "Counter", arg);
scope.put("myCounter", scope, myCounter);
</pre>
</blockquote>
Now we can reference the <tt>myCounter</tt> object from our script:
<blockquote>
<pre style="color: #663366">
$ java RunScript3 'RunScript4 'myCounter.count; myCounter.count'
8
</pre>
</blockquote>
</body>
</html>

View File

@@ -1,77 +0,0 @@
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Author" content="Norris Boyd">
<meta name="GENERATOR" content="Mozilla/4.72 [en]C-NSCP (WinNT; U) [Netscape]">
<meta name="KeyWords" content="Rhino, JavaScript, Java">
<title>Using Rhino</title>
</head>
<body bgcolor="#FFFFFF">
<script src="owner.js"></script>
<center>
<h1>
How are people using Rhino?</h1></center>
Here's a partial list of the ways people are using Rhino in their projects.
The initial list was collected by Netscape marketing, so Rhino is referred
to as Netscape Java-based JavaScript. We'd love to hear how you're using
Rhino--just mail&nbsp;<script>document.write(owner());</script>
.
<p><a href="http://www.attachmate.com">Attachmate</a>
<br>"Netscape JavaScript 1.5 with Java implementation was a perfect solution
for developing our MacroRecorder because it made our development process
faster and better, and our customers get a more efficient, reliable, and
standards based product as a result," said Rob Clark, Director of Product
Development at Attachmate. Attachmate integrates Netscape's Java-based
JavaScript 1.5 Interpreter into its 100% Pure Java certified web-to-host
thin clients, called e-Vantage Viewers. The Netscape Java-based JavaScript
interpreter is used in a MacroRecorder feature that allows browser-based
users to efficiently navigate host applications on mainframe and midrange
systems.
<p><a href="http://www.bristowhill.com/">Bristow Hill Software</a>
<br>"We thought it would require lots of work to add scripting capability
to Bristow Hill Server Pages, but we were delighted to find that Netscape
JavaScript 1.5 with Java implementation fit right in with only a couple
of lines of initialization code and one line of code to export our standard
objects by name. Also, we were pleased to find we could take embedded scripting
and compile it down to Java classes which could be used directly for greater
speed in production. Netscape's JavaScript engine is rock solid and standards
compliant, and my only regret is that we didn't start using it sooner,"
said Don Anderson, President of Bristow Hill Software.
<p><a href="http://www.icesoft.com/">ICEsoft Technologies</a>
<br>ICEsoft Technologies adds JavaScript support to their <a href="http://www.icesoft.com/ps_browser_overview.html">ICEbrowser</a> using Rhino.
<p><a href="http://homepage.mac.com/pcbeard/JShell/">JShell</a>
<br>Rhino is used as the scripting language for the open source command
shell JShell written by Patrick Beard.
<p><a href="http://www.softcom.com">Softcom</a>
<br>The tight integration of Netscape's Java-based JavaScript 1.5 with
Softcom's Java-based RealPlayer plugin, RJ, enables Softcom to quickly
produce dynamic interactive video applications for our media/entertainment,
retail and professional education clients, helping us to synchronize the
full interactivity of the Web and e-commerce with streaming video, said
Chris O'Brien, president and COO of Softcom. For the enhanced Oscarcast
recently produced for E! Online during the Academy Awards, Softcom used
RJ to embed Netscape's JavaScript 1.5 in the RealPlayer, successfully integrating
interactive chat and Java games, along with streaming video, within the
RealPlayer.
<p><a href="http://www.tdiinc.com/">Technology Deployment International</a>
<br>"Technology Deployment International selected the Java-based Netscape
JavaScript engine to incorporate into the workflow module of our eBusiness
Management System (eBMS) allowing our customers to integrate business logic
into any workstep of their application," said Dr. Kelvin Liu, VP eBMS Development,
Technology Deployment International. "It has been easy to embed, the support
we received from the engineering team has been outstanding, and the performance
of the JavaScript code is almost identical to the equivalent Java."
<p><a href="http://www.xypoint.com/">XYPOINT</a>
<br>XYPOINT uses Rhino for automating test cases of their Java classes
used in their service <a href="http://www.webwirelessnow.com/">WebWirelessNow</a>.
Abraham Backus says that he's happy with Rhino because "I've always wanted
this kind of JavaScript support."
<h3>
<hr WIDTH="100%"><br>
<a href="index.html">back to top</a></h3>
</body>
</html>

View File

@@ -1,35 +1,19 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
import org.mozilla.javascript.*;
@@ -38,7 +22,7 @@ import org.mozilla.javascript.*;
* Example of controlling the JavaScript execution engine.
*
* We evaluate a script and then manipulate the result.
*
*
*/
public class Control {
@@ -59,7 +43,7 @@ public class Control {
// Initialize the standard objects (Object, Function, etc.)
// This must be done before scripts can be executed.
Scriptable scope = cx.initStandardObjects();
Scriptable scope = cx.initStandardObjects(null);
// Now we can evaluate a script. Let's create a new object
// using the object literal notation.
@@ -72,28 +56,33 @@ public class Control {
// ignore
}
Scriptable obj = (Scriptable) scope.get("obj", scope);
FlattenedObject global = new FlattenedObject(scope);
FlattenedObject f = (FlattenedObject) global.getProperty("obj");
// Should print "obj == result" (Since the result of an assignment
// expression is the value that was assigned)
System.out.println("obj " + (obj == result ? "==" : "!=") +
System.out.println("obj " + (f.getObject() == result ? "==" : "!=") +
" result");
// Should print "obj.a == 1"
System.out.println("obj.a == " + obj.get("a", obj));
// Should print "f.a == 1"
System.out.println("f.a == " + f.getProperty("a"));
Scriptable b = (Scriptable) obj.get("b", obj);
FlattenedObject b = (FlattenedObject) f.getProperty("b");
// Should print "obj.b[0] == x"
System.out.println("obj.b[0] == " + b.get(0, b));
// Should print "f.b[0] == x"
System.out.println("f.b[0] == " + b.getProperty(new Integer(0)));
// Should print "obj.b[1] == y"
System.out.println("obj.b[1] == " + b.get(1, b));
// Should print "f.b[1] == y"
System.out.println("f.b[1] == " + b.getProperty(new Integer(1)));
try {
// Should print {a:1, b:["x", "y"]}
Function fn = (Function) ScriptableObject.getProperty(obj, "toString");
System.out.println(fn.call(cx, scope, obj, new Object[0]));
System.out.println(f.callMethod("toString", new Object[0]));
} catch (PropertyException e) {
// ignore
} catch (NotAFunctionException e) {
// ignore
} catch (JavaScriptException e) {
// ignore
}

View File

@@ -1,56 +0,0 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import org.mozilla.javascript.*;
public class Counter extends ScriptableObject {
// The zero-argument constructor used by Rhino runtime to create instances
public Counter() { }
// Method jsConstructor defines the JavaScript constructor
public void jsConstructor(int a) { count = a; }
// The class name is defined by the getClassName method
public String getClassName() { return "Counter"; }
// The method jsGet_count defines the count property.
public int jsGet_count() { return count++; }
// Methods can be defined using the jsFunction_ prefix. Here we define
// resetCount for JavaScript.
public void jsFunction_resetCount() { count = 0; }
private int count;
}

View File

@@ -1,79 +0,0 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import org.mozilla.javascript.*;
/**
* An example illustrating how to create a JavaScript object and retrieve
* properties and call methods.
* <p>
* Output should be:
* <pre>
* count = 0
* count = 1
* resetCount
* count = 0
* </pre>
*/
public class CounterTest {
public static void main(String[] args) throws Exception
{
Context cx = Context.enter();
try {
Scriptable scope = cx.initStandardObjects();
ScriptableObject.defineClass(scope, Counter.class);
Scriptable testCounter = cx.newObject(scope, "Counter");
Object count = ScriptableObject.getProperty(testCounter, "count");
System.out.println("count = " + count);
count = ScriptableObject.getProperty(testCounter, "count");
System.out.println("count = " + count);
ScriptableObject.callMethod(testCounter,
"resetCount",
new Object[0]);
System.out.println("resetCount");
count = ScriptableObject.getProperty(testCounter, "count");
System.out.println("count = " + count);
} finally {
Context.exit();
}
}
}

View File

@@ -1,172 +0,0 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-2000 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import org.mozilla.javascript.*;
/**
* Example of controlling the JavaScript with multiple scopes and threads.
*/
public class DynamicScopes {
/**
* Main entry point.
*
* Set up the shared scope and then spawn new threads that execute
* relative to that shared scope. Try compiling functions with and
* without dynamic scope to see the effect.
*
* The expected output is
* <pre>
* sharedScope
* sharedScope
* sharedScope
* thread0
* thread1
* thread2
* </pre>
* The final three lines may be permuted in any order depending on
* thread scheduling.
*/
public static void main(String[] args)
throws JavaScriptException
{
Context cx = Context.enter();
try {
cx.setCompileFunctionsWithDynamicScope(false);
runScripts(cx);
cx.setCompileFunctionsWithDynamicScope(true);
runScripts(cx);
} finally {
cx.exit();
}
}
static void runScripts(Context cx)
throws JavaScriptException
{
// Initialize the standard objects (Object, Function, etc.)
// This must be done before scripts can be executed. The call
// returns a new scope that we will share.
ScriptableObject scope = cx.initStandardObjects(null, true);
// Now we can evaluate a script and functions will be compiled to
// use dynamic scope if the Context is so initialized.
String source = "var x = 'sharedScope';" +
"function f() { return x; }";
cx.evaluateString(scope, source, "MySource", 1, null);
// Now we spawn some threads that execute a script that calls the
// function 'f'. The scope chain looks like this:
// <pre>
// ------------------
// | shared scope |
// ------------------
// ^
// |
// ------------------
// | per-thread scope |
// ------------------
// ^
// |
// ------------------
// | f's activation |
// ------------------
// </pre>
// Both the shared scope and the per-thread scope have variables 'x'
// defined in them. If 'f' is compiled with dynamic scope enabled,
// the 'x' from the per-thread scope will be used. Otherwise, the 'x'
// from the shared scope will be used. The 'x' defined in 'g' (which
// calls 'f') should not be seen by 'f'.
final int threadCount = 3;
Thread[] t = new Thread[threadCount];
for (int i=0; i < threadCount; i++) {
String script = "function g() { var x = 'local'; return f(); }" +
"java.lang.System.out.println(g());";
t[i] = new Thread(new PerThread(scope, script,
"thread" + i));
}
for (int i=0; i < threadCount; i++)
t[i].start();
// Don't return in this thread until all the spawned threads have
// completed.
for (int i=0; i < threadCount; i++) {
try {
t[i].join();
} catch (InterruptedException e) {
}
}
}
static class PerThread implements Runnable {
PerThread(Scriptable scope, String script, String x) {
this.scope = scope;
this.script = script;
this.x = x;
}
public void run() {
// We need a new Context for this thread.
Context cx = Context.enter();
try {
// We can share the scope.
Scriptable threadScope = cx.newObject(scope);
threadScope.setPrototype(scope);
// We want "threadScope" to be a new top-level
// scope, so set its parent scope to null. This
// means that any variables created by assignments
// will be properties of "threadScope".
threadScope.setParentScope(null);
// Create a JavaScript property of the thread scope named
// 'x' and save a value for it.
threadScope.put("x", threadScope, x);
cx.evaluateString(threadScope, script, "threadScript", 1, null);
}
catch (JavaScriptException jse) {
// ignore
}
finally {
Context.exit();
}
}
private Scriptable scope;
private String script;
private String x;
}
}

View File

@@ -1,36 +1,19 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-2000 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
import org.mozilla.javascript.*;
@@ -47,6 +30,7 @@ import java.util.Vector;
* Example of use of the File object:
* <pre>
* js> defineClass("File")
* js> var file = new File("myfile.txt");
* js> file = new File("myfile.txt");
* [object File]
* js> file.writeLine("one"); <i>only now is file actually opened</i>
@@ -64,7 +48,7 @@ import java.util.Vector;
* be wrapped as JavaScript exceptions when called from JavaScript,
* and may be caught within JavaScript.
*
* @author Norris Boyd
* @author Norris Boyd
*/
public class File extends ScriptableObject {
@@ -87,9 +71,8 @@ public class File extends ScriptableObject {
* Otherwise System.in or System.out is assumed as appropriate
* to the use.
*/
public static Scriptable jsConstructor(Context cx, Object[] args,
Function ctorObj,
boolean inNewExpr)
public static Scriptable js_File(Context cx, Object[] args,
Function ctorObj, boolean inNewExpr)
{
File result = new File();
if (args.length == 0 || args[0] == Context.getUndefinedValue()) {
@@ -114,7 +97,7 @@ public class File extends ScriptableObject {
*
* Used to define the "name" property.
*/
public String jsGet_name() {
public String js_getName() {
return name;
}
@@ -131,20 +114,29 @@ public class File extends ScriptableObject {
* @exception JavaScriptException if a JavaScript exception occurred
* while creating the result array
*/
public Object jsFunction_readLines()
public Object js_readLines()
throws IOException, JavaScriptException
{
Vector v = new Vector();
String s;
while ((s = jsFunction_readLine()) != null) {
while ((s = js_readLine()) != null) {
v.addElement(s);
}
Object[] lines = new Object[v.size()];
v.copyInto(lines);
Scriptable scope = ScriptableObject.getTopLevelScope(this);
Context cx = Context.getCurrentContext();
return cx.newObject(scope, "Array", lines);
Scriptable result;
try {
Context cx = Context.getCurrentContext();
result = cx.newObject(scope, "Array", lines);
} catch (PropertyException e) {
throw Context.reportRuntimeError(e.getMessage());
} catch (NotAFunctionException e) {
throw Context.reportRuntimeError(e.getMessage());
}
return result;
}
/**
@@ -155,7 +147,7 @@ public class File extends ScriptableObject {
* associated with this object, or EOFException if the object
* reached the end of the file
*/
public String jsFunction_readLine() throws IOException {
public String js_readLine() throws IOException {
return getReader().readLine();
}
@@ -166,7 +158,22 @@ public class File extends ScriptableObject {
* associated with this object, or EOFException if the object
* reached the end of the file
*/
public String jsFunction_readChar() throws IOException {
public String js_readChar() throws IOException {
int i = getReader().read();
if (i == -1)
return null;
char[] charArray = { (char) i };
return new String(charArray);
}
/**
* Read a block.
*
* @exception IOException if an error occurred while accessing the file
* associated with this object, or EOFException if the object
* reached the end of the file
*/
public String js_readBlock() throws IOException {
int i = getReader().read();
if (i == -1)
return null;
@@ -184,8 +191,8 @@ public class File extends ScriptableObject {
* @exception IOException if an error occurred while accessing the file
* associated with this object
*/
public static void jsFunction_write(Context cx, Scriptable thisObj,
Object[] args, Function funObj)
public static void js_write(Context cx, Scriptable thisObj,
Object[] args, Function funObj)
throws IOException
{
write0(thisObj, args, false);
@@ -199,14 +206,14 @@ public class File extends ScriptableObject {
* associated with this object
*
*/
public static void jsFunction_writeLine(Context cx, Scriptable thisObj,
Object[] args, Function funObj)
public static void js_writeLine(Context cx, Scriptable thisObj,
Object[] args, Function funObj)
throws IOException
{
write0(thisObj, args, true);
}
public int jsGet_lineNumber()
public int js_getLineNumber()
throws FileNotFoundException
{
return getReader().getLineNumber();
@@ -219,7 +226,7 @@ public class File extends ScriptableObject {
* @exception IOException if an error occurred while accessing the file
* associated with this object
*/
public void jsFunction_close() throws IOException {
public void js_close() throws IOException {
if (reader != null) {
reader.close();
reader = null;
@@ -236,7 +243,7 @@ public class File extends ScriptableObject {
*/
public void finalize() {
try {
jsFunction_close();
js_close();
}
catch (IOException e) {
}
@@ -244,6 +251,11 @@ public class File extends ScriptableObject {
/**
* Get the Java reader.
*
* Note that we use the name "jsFunction_getReader" because if we
* used just "js_getReader" we'd be defining a readonly property
* named "reader".
*
*/
public Object jsFunction_getReader() {
if (reader == null)

View File

@@ -1,35 +1,19 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
import org.mozilla.javascript.*;

View File

@@ -0,0 +1,43 @@
#! gmake
# The contents of this file are subject to the Netscape Public License
# Version 1.0 (the "NPL"); you may not use this file except in
# compliance with the NPL. You may obtain a copy of the NPL at
# http://www.mozilla.org/NPL/
#
# Software distributed under the NPL is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
# for the specific language governing rights and limitations under the
# NPL.
#
# The Initial Developer of this code under the NPL is Netscape
# Communications Corporation. Portions created by Netscape are
# Copyright (C) 1999 Netscape Communications Corporation. All Rights
# Reserved.
#
# Makefile for the examples directory.
#
# This Makefile just calls $(JAVAC) on all the .java files. This
# Makefile is intended to be called from the toplevel Makefile.
#
JSFILES = $(PATH_PREFIX)/*.js
SOURCES = $(PATH_PREFIX)/*.java
CLASSES = $(PATH_PREFIX)/*.class
$(CLASSES) : $(SOURCES)
$(JAVAC) $(JFLAGS) $(SOURCES)
clean :
- rm $(CLASSES) $(PATH_PREFIX)/MANIFEST
clobber : clean
check :
$(PATH_PREFIX)/MANIFEST : $(SOURCES) $(CLASSES) $(JSFILES)
ls $(SOURCES) $(CLASSES) $(JSFILES) \
> $(@)
# Emulate .PHONY
FORCE :

View File

@@ -1,35 +1,19 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
import org.mozilla.javascript.*;
@@ -76,7 +60,7 @@ public class Matrix implements Scriptable {
/**
* The zero-parameter constructor.
*
* When ScriptableObject.defineClass is called with this class, it will
* When Context.defineClass is called with this class, it will
* construct Matrix.prototype using this constructor.
*/
public Matrix() {
@@ -259,9 +243,7 @@ public class Matrix implements Scriptable {
public boolean hasInstance(Scriptable value) {
Scriptable proto = value.getPrototype();
while (proto != null) {
if (proto.equals(this))
return true;
proto = proto.getPrototype();
if (proto.equals(this)) return true;
}
return false;

View File

@@ -1,19 +0,0 @@
<html>
<body>
This is the NervousText applet in javascript:
<applet archive="js.jar" code=NervousText width=200 height=50 >
</applet>
<hr>
The test assumes that applet code is generated with:
<pre>
java -classpath js.jar org.mozilla.javascript.tools.jsc.Main \
-extends java.applet.Applet \
-implements java.lang.Runnable \
NervousText.js
</pre>
and the resulting 2 classes, NervousText.class extending java.applet.Applet and implementing java.lang.Runnable and NervousText1.class which represents compiled JavaScript code, are placed in the same directory as NervousText.html.
<p>
The test also assumes that js.jar from Rhino distribution is available in the same directory.
</body>
</html>

View File

@@ -1,75 +0,0 @@
// The Java "NervousText" example ported to JavaScript.
// Compile using java org.mozilla.javascript.tools.jsc.Main -extends java.applet.Applet -implements java.lang.Runnable NervousText.js
/*
Adapted from Java code by
Daniel Wyszynski
Center for Applied Large-Scale Computing (CALC)
04-12-95
Test of text animation.
kwalrath: Changed string; added thread suspension. 5-9-95
*/
var Font = java.awt.Font;
var Thread = java.lang.Thread;
var separated;
var s = null;
var killme = null;
var i;
var x_coord = 0, y_coord = 0;
var num;
var speed=35;
var counter =0;
var threadSuspended = false; //added by kwalrath
function init() {
this.resize(150,50);
this.setFont(new Font("TimesRoman",Font.BOLD,36));
s = this.getParameter("text");
if (s == null) {
s = "Rhino";
}
separated = s.split('');
}
function start() {
if(killme == null)
{
killme = new java.lang.Thread(java.lang.Runnable(this));
killme.start();
}
}
function stop() {
killme = null;
}
function run() {
while (killme != null) {
try {Thread.sleep(100);} catch (e){}
this.repaint();
}
killme = null;
}
function paint(g) {
for(i=0;i<separated.length;i++)
{
x_coord = Math.random()*10+15*i;
y_coord = Math.random()*10+36;
g.drawChars(separated, i,1,x_coord,y_coord);
}
}
/* Added by kwalrath. */
function mouseDown(evt, x, y) {
if (threadSuspended) {
killme.resume();
}
else {
killme.suspend();
}
threadSuspended = !threadSuspended;
return true;
}

View File

@@ -1,69 +0,0 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import org.mozilla.javascript.*;
/**
* An example WrapFactory that can be used to avoid wrapping of Java types
* that can be converted to ECMA primitive values.
* So java.lang.String is mapped to ECMA string, all java.lang.Numbers are
* mapped to ECMA numbers, and java.lang.Booleans are mapped to ECMA booleans
* instead of being wrapped as objects. Additionally java.lang.Character is
* converted to ECMA string with length 1.
* Other types have the default behavior.
* <p>
* Note that calling "new java.lang.String('foo')" in JavaScript with this
* wrap factory enabled will still produce a wrapped Java object since the
* WrapFactory.wrapNewObject method is not overridden.
* <p>
* The PrimitiveWrapFactory is enabled on a Context by calling setWrapFactory
* on that context.
*/
public class PrimitiveWrapFactory extends WrapFactory {
public Object wrap(Context cx, Scriptable scope, Object obj,
Class staticType)
{
if (obj instanceof String || obj instanceof Number ||
obj instanceof Boolean)
{
return obj;
} else if (obj instanceof Character) {
char[] a = { ((Character)obj).charValue() };
return new String(a);
}
return super.wrap(cx, scope, obj, staticType);
}
}

View File

@@ -1,76 +1,57 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
* Copyright (C) 1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
import org.mozilla.javascript.*;
/**
* RunScript: simplest example of controlling execution of Rhino.
*
* Collects its arguments from the command line, executes the
*
* Collects its arguments from the command line, executes the
* script, and prints the result.
*
*
* @author Norris Boyd
*/
public class RunScript {
public static void main(String args[])
throws JavaScriptException
public static void main(String args[])
throws JavaScriptException
{
// Creates and enters a Context. The Context stores information
// about the execution environment of a script.
Context cx = Context.enter();
try {
// Initialize the standard objects (Object, Function, etc.)
// This must be done before scripts can be executed. Returns
// a scope object that we use in later calls.
Scriptable scope = cx.initStandardObjects();
// Collect the arguments into a single string.
String s = "";
for (int i=0; i < args.length; i++) {
s += args[i];
}
// Now evaluate the string we've colected.
Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);
// Convert the result to a string and print it.
System.err.println(cx.toString(result));
} finally {
// Exit from the context.
Context.exit();
}
// Initialize the standard objects (Object, Function, etc.)
// This must be done before scripts can be executed. Returns
// a scope object that we use in later calls.
Scriptable scope = cx.initStandardObjects(null);
// Collect the arguments into a single string.
String s = "";
for (int i=0; i < args.length; i++)
s += args[i];
// Now evaluate the string we've colected.
Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);
// Convert the result to a string and print it.
System.err.println(cx.toString(result));
// Exit from the context.
Context.exit();
}
}

View File

@@ -1,67 +0,0 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import org.mozilla.javascript.*;
/**
* RunScript2: Like RunScript, but reflects the System.out into JavaScript.
*
* @author Norris Boyd
*/
public class RunScript2 {
public static void main(String args[])
throws JavaScriptException
{
Context cx = Context.enter();
try {
Scriptable scope = cx.initStandardObjects();
// Add a global variable "out" that is a JavaScript reflection
// of System.out
Scriptable jsArgs = Context.toObject(System.out, scope);
scope.put("out", scope, jsArgs);
String s = "";
for (int i=0; i < args.length; i++) {
s += args[i];
}
Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);
System.err.println(cx.toString(result));
} finally {
Context.exit();
}
}
}

View File

@@ -1,86 +0,0 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import org.mozilla.javascript.*;
/**
* RunScript3: Example of using JavaScript objects
*
* Collects its arguments from the command line, executes the
* script, and then ...
*
* @author Norris Boyd
*/
public class RunScript3 {
public static void main(String args[])
throws JavaScriptException
{
Context cx = Context.enter();
try {
Scriptable scope = cx.initStandardObjects();
// Collect the arguments into a single string.
String s = "";
for (int i=0; i < args.length; i++) {
s += args[i];
}
// Now evaluate the string we've colected. We'll ignore the result.
cx.evaluateString(scope, s, "<cmd>", 1, null);
// Print the value of variable "x"
Object x = scope.get("x", scope);
if (x == Scriptable.NOT_FOUND) {
System.out.println("x is not defined.");
} else {
System.out.println("x = " + Context.toString(x));
}
// Call function "f('my arg')" and print its result.
Object fObj = scope.get("f", scope);
if (!(fObj instanceof Function)) {
System.out.println("f is undefined or not a function.");
} else {
Object functionArgs[] = { "my arg" };
Function f = (Function)fObj;
Object result = f.call(cx, scope, scope, functionArgs);
String report = "f('my args') = " + Context.toString(result);
System.out.println(report);
}
} finally {
Context.exit();
}
}
}

View File

@@ -1,75 +0,0 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import org.mozilla.javascript.*;
/**
* RunScript4: Execute scripts in an environment that includes the
* example Counter class.
*
* @author Norris Boyd
*/
public class RunScript4 {
public static void main(String args[])
throws Exception
{
Context cx = Context.enter();
try {
Scriptable scope = cx.initStandardObjects();
// Use the Counter class to define a Counter constructor
// and prototype in JavaScript.
ScriptableObject.defineClass(scope, Counter.class);
// Create an instance of Counter and assign it to
// the top-level variable "myCounter". This is
// equivalent to the JavaScript code
// myCounter = new Counter(7);
Object[] arg = { new Integer(7) };
Scriptable myCounter = cx.newObject(scope, "Counter", arg);
scope.put("myCounter", scope, myCounter);
String s = "";
for (int i=0; i < args.length; i++) {
s += args[i];
}
Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);
System.err.println(cx.toString(result));
} finally {
Context.exit();
}
}
}

View File

@@ -1,35 +1,19 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Original Code is Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is Netscape
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
import org.mozilla.javascript.*;
@@ -43,12 +27,7 @@ import java.io.*;
*
* @author Norris Boyd
*/
public class Shell extends ScriptableObject
{
public String getClassName()
{
return "global";
}
public class Shell extends ScriptableObject {
/**
* Main entry point.
@@ -61,40 +40,42 @@ public class Shell extends ScriptableObject
public static void main(String args[]) {
// Associate a new Context with this thread
Context cx = Context.enter();
// A bit of shorthand: since Shell extends ScriptableObject,
// we can make it the global object.
global = new Shell();
// Initialize the standard objects (Object, Function, etc.)
// This must be done before scripts can be executed.
cx.initStandardObjects(global);
// Define some global functions particular to the shell. Note
// that these functions are not part of ECMA.
String[] names = { "print", "quit", "version", "load", "help" };
try {
// Initialize the standard objects (Object, Function, etc.)
// This must be done before scripts can be executed.
Shell shell = new Shell();
cx.initStandardObjects(shell);
// Define some global functions particular to the shell. Note
// that these functions are not part of ECMA.
String[] names = { "print", "quit", "version", "load", "help" };
try {
shell.defineFunctionProperties(names, Shell.class,
ScriptableObject.DONTENUM);
} catch (PropertyException e) {
throw new Error(e.getMessage());
}
args = processOptions(cx, args);
// Set up "arguments" in the global scope to contain the command
// line arguments after the name of the script to execute
Object[] array = args;
if (args.length > 0) {
int length = args.length - 1;
array = new Object[length];
System.arraycopy(args, 1, array, 0, length);
}
Scriptable argsObj = cx.newArray(shell, array);
shell.defineProperty("arguments", argsObj,
ScriptableObject.DONTENUM);
shell.processSource(cx, args.length == 0 ? null : args[0]);
} finally {
Context.exit();
global.defineFunctionProperties(names, Shell.class,
ScriptableObject.DONTENUM);
} catch (PropertyException e) {
throw new Error(e.getMessage());
}
args = processOptions(cx, args);
// Set up "arguments" in the global scope to contain the command
// line arguments after the name of the script to execute
Object[] array = args;
if (args.length > 0) {
int length = args.length - 1;
array = new Object[length];
System.arraycopy(args, 1, array, 0, length);
}
Scriptable argsObj = cx.newArray(global, array);
global.defineProperty("arguments", argsObj,
ScriptableObject.DONTENUM);
processSource(cx, args.length == 0 ? null : args[0]);
cx.exit();
}
/**
@@ -123,13 +104,25 @@ public class Shell extends ScriptableObject
return new String[0];
}
/**
* Return name of this class, the global object.
*
* This method must be implemented in all concrete classes
* extending ScriptableObject.
*
* @see com.netscape.javascript.Scriptable#getClassName
*/
public String getClassName() {
return "global";
}
/**
* Print a usage message.
*/
private static void usage(String s) {
public static void usage(String s) {
p("Didn't understand \"" + s + "\".");
p("Valid arguments are:");
p("-version 100|110|120|130|140|150");
p("-version 100|110|120|130");
System.exit(1);
}
@@ -138,7 +131,7 @@ public class Shell extends ScriptableObject
*
* This method is defined as a JavaScript function.
*/
public void help() {
public static void help(String s) {
p("");
p("Command Description");
p("======= ===========");
@@ -188,8 +181,7 @@ public class Shell extends ScriptableObject
*
* This method is defined as a JavaScript function.
*/
public void quit()
{
public static void quit() {
quitting = true;
}
@@ -218,9 +210,8 @@ public class Shell extends ScriptableObject
public static void load(Context cx, Scriptable thisObj,
Object[] args, Function funObj)
{
Shell shell = (Shell)getTopLevelScope(thisObj);
for (int i = 0; i < args.length; i++) {
shell.processSource(cx, cx.toString(args[i]));
for (int i=0; i < args.length; i++) {
processSource(cx, cx.toString(args[i]));
}
}
@@ -232,8 +223,7 @@ public class Shell extends ScriptableObject
* @param filename the name of the file to compile, or null
* for interactive mode.
*/
private void processSource(Context cx, String filename)
{
public static void processSource(Context cx, String filename) {
if (filename == null) {
BufferedReader in = new BufferedReader
(new InputStreamReader(System.in));
@@ -265,7 +255,7 @@ public class Shell extends ScriptableObject
if (cx.stringIsCompilableUnit(source))
break;
}
Object result = cx.evaluateString(this, source,
Object result = cx.evaluateString(global, source,
sourceName, startline,
null);
if (result != cx.getUndefinedValue()) {
@@ -309,7 +299,7 @@ public class Shell extends ScriptableObject
// Here we evalute the entire contents of the file as
// a script. Text is printed only if the print() function
// is called.
cx.evaluateReader(this, in, filename, 1, null);
cx.evaluateReader(global, in, filename, 1, null);
}
catch (WrappedException we) {
System.err.println(we.getWrappedException().toString());
@@ -340,6 +330,7 @@ public class Shell extends ScriptableObject
System.out.println(s);
}
private boolean quitting;
static Shell global;
static boolean quitting;
}

View File

@@ -1,61 +0,0 @@
/*
* SwingApplication.js - a translation into JavaScript of
* SwingApplication.java, a java.sun.com Swing example.
*
* @author Roger E Critchlow, Jr.
*/
importPackage(Packages.javax.swing);
importPackage(Packages.java.awt);
importPackage(Packages.java.awt.event);
function createComponents() {
var labelPrefix = "Number of button clicks: ";
var numClicks = 0;
var label = new JLabel(labelPrefix + numClicks);
var button = new JButton("I'm a Swing button!");
button.mnemonic = KeyEvent.VK_I;
// Since Rhino 1.5R5 JS functions can be passed to Java method if
// corresponding argument type is Java interface with single method.
button.addActionListener(function() {
numClicks += 1;
label.setText(labelPrefix + numClicks);
});
label.setLabelFor(button);
/*
* An easy way to put space between a top-level container
* and its contents is to put the contents in a JPanel
* that has an "empty" border.
*/
var pane = new JPanel();
pane.border = BorderFactory.createEmptyBorder(30, //top
30, //left
10, //bottom
30); //right
pane.setLayout(new GridLayout(0, 1));
pane.add(button);
pane.add(label);
return pane;
}
try {
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
} catch (e) { }
//Create the top-level container and add contents to it.
var frame = new JFrame("SwingApplication");
frame.getContentPane().add(createComponents(), BorderLayout.CENTER);
//Finish setting up the frame, and show it.
frame.addWindowListener(new WindowAdapter({
windowClosing : function() {
java.lang.System.exit(0);
}
}) );
frame.pack();
frame.setVisible(true);

View File

@@ -1,44 +1,9 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
/**
* checkParam.js
*
* The files given as arguments on the command line are assumed to be
* Java source code files. This program checks to see that the @param
* tags in the documentation comments match with the parameters for
* tags in the documentation comments match with the parameters for
* the associated Java methods.
* <p>
* Any errors found are reported.
@@ -54,12 +19,12 @@ function stringEndsWith(str, suffix) {
/**
* Perform processing once the end of a documentation comment is seen.
*
* Look for a parameter list following the end of the comment and
* Look for a parameter list following the end of the comment and
* collect the parameters and compare to the @param entries.
* Report any discrepancies.
* @param f the current file
* @param a an array of parameters from @param comments
* @param line the string containing the comment end (in case the
* @param line the string containing the comment end (in case the
* parameters are on the same line)
*/
function processCommentEnd(f, a, line) {
@@ -72,14 +37,14 @@ function processCommentEnd(f, a, line) {
var m = line.match(/\(([^\)]+)\)/);
var args = m ? m[1].split(",") : [];
if (a.length != args.length) {
print('"' + f.name +
print('"' + f.name +
'"; line ' + f.lineNumber +
' mismatch: had a different number' +
' of @param entries and parameters.');
} else {
for (var i=0; i < a.length; i++) {
if (!stringEndsWith(args[i], a[i])) {
print('"' + f.name +
print('"' + f.name +
'"; line ' + f.lineNumber +
' mismatch: had "' + a[i] +
'" and "' + args[i] + '".');
@@ -88,9 +53,9 @@ function processCommentEnd(f, a, line) {
}
}
}
/**
* Process the given file, looking for mismatched @param lists and
* Process the given file, looking for mismatched @param lists and
* parameter lists.
* @param f the file to process
*/
@@ -104,11 +69,11 @@ function processFile(f) {
if (line.match(/@param/)) {
while (m = line.match(/@param[ ]+([^ ]+)/)) {
a[i++] = m[1];
line = f.readLine();
line = f.readLine();
if (line == null)
break outer;
}
}
}
if (i != 0 && line.match(/\*\//)) {
processCommentEnd(f, a, line);
i = 0;
@@ -116,7 +81,7 @@ function processFile(f) {
}
}
if (i != 0) {
print('"' + f.name +
print('"' + f.name +
'"; line ' + f.lineNumber +
' missing parameters at end of file.');
}

View File

@@ -1,44 +1,9 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Patrick Beard
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
/*
enum.js
Implementing the interface java.util.Enumeration using the new syntax.
Note that this syntax is experimental only, and hasn't been approved
by ECMA.
by ECMA.
The same functionality can be had without the new syntax using the
uglier syntax:
@@ -47,7 +12,7 @@
hasMoreElements: function ...
nextElement: function ...
});
by Patrick C. Beard.
*/

View File

@@ -1,46 +1,10 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
* Roland Pennings
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
/**
* Process a JavaScript source file and process special comments
* to produce an HTML file of documentation, similar to javadoc.
* @author Norris Boyd
* @see rhinotip.jar
* @lastmodified xx
* @version 1.2 Roland Pennings: Allow multiple files for a function.
* @version 1.2 Roland Pennings: Allow multiple files for a function.
* @version 1.3 Roland Pennings: Removes ../.. from the input directory name
*/
defineClass("File")
@@ -61,7 +25,7 @@ var debug = 0;
/**
* Process JavaScript source file <code>f</code>, writing jsdoc to
* Process JavaScript source file <code>f</code>, writing jsdoc to
* file <code>out</code>.
* @param f input file
* @param fname name of the input file (without the path)
@@ -72,11 +36,11 @@ function processFile(f, fname, inputdir, out) {
var s;
var firstLine = true;
indexFileArray[fname] = "";
// write the header of the output file
out.writeLine('<HTML><HEADER><TITLE>' + fname + '</TITLE><BODY>');
if (inputdir != null) {
outstr = '<a name=\"_top_\"></a><pre><a href=\"' + indexFile + '\">Index Files</a> ';
outstr = '<a name=\"_top_\"></a><pre><a href=\"' + indexFile + '\">Index Files</a> ';
outstr += '<a href=\"' + indexFunction + '\">Index Functions</a></pre><hr>';
out.writeLine(outstr);
}
@@ -98,7 +62,7 @@ function processFile(f, fname, inputdir, out) {
// Strip leading whitespace and "*".
comment += s.replace(/^\s*\*/, "");
s = f.readLine();
} while (s != null);
} while (s != null);
if (debug)
print("Found comment " + comment);
@@ -119,59 +83,31 @@ function processFile(f, fname, inputdir, out) {
m = s.match(/^\s*function\s+((\w+)|(\w+)(\s+))\(([^)]*)\)/);
if (m != null)
{
// Found a function start
var htmlText = processFunction(m[1], m[5], comment); // sjm changed from 2nd to 5th arg
// Found a function start
var htmlText = processFunction(m[1], m[2], comment);
// Save the text in a global variable, so we
// can write out a table of contents first.
functionDocArray[functionDocArray.length] = {name:m[1], text:htmlText};
// Store the function also in the indexFunctionArray
// so we can have a seperate file with the function table of contents
if (indexFunctionArray[m[1]]) {
// print("ERROR: function: " + m[1] + " is defined more than once!");
// Allow multiple files for a function
with (indexFunctionArray[m[1]]) {
filename = filename + "|" + fname;
// print("filename = " + filename);
}
}
else {
indexFunctionArray[m[1]] = {filename:fname};
}
//reset comment
comment = "";
}
// match a method being bound to a prototype
m = s.match(/^\s*(\w*)\.prototype\.(\w*)\s*=\s*function\s*\(([^)]*)\)/);
if (m != null)
{
// Found a method being bound to a prototype.
var htmlText = processPrototypeMethod(m[1], m[2], m[3], comment);
// Save the text in a global variable, so we
// can write out a table of contents first.
functionDocArray[functionDocArray.length] = {name:m[1]+".prototype."+m[2], text:htmlText};
// Store the function also in the indexFunctionArray
// so we can have a seperate file with the function table of contents
if (indexFunctionArray[m[1]]) {
// print("ERROR: function: " + m[1] + " is defined more than once!");
// Allow multiple files for a function
with (indexFunctionArray[m[1]]) {
filename = filename + "|" + fname;
// print("filename = " + filename);
}
}
else {
indexFunctionArray[m[1]] = {filename:fname};
}
//reset comment
comment = "";
}
firstLine = false;
// Save the text in a global variable, so we
// can write out a table of contents first.
functionDocArray[functionDocArray.length] =
{name:m[1], text:htmlText};
// Store the function also in the indexFunctionArray
// so we can have a seperate file with the function table of contents
if (indexFunctionArray[m[1]]) {
// print("ERROR: function: " + m[1] + " is defined more than once!");
// Allow multiple files for a function
with (indexFunctionArray[m[1]]) {
filename = filename + "|" + fname;
// print("filename = " + filename);
}
} else {
indexFunctionArray[m[1]] =
{filename:fname};
}
//reset comment
comment = "";
}
firstLine = false;
}
// Write table of contents.
@@ -193,7 +129,7 @@ function processFile(f, fname, inputdir, out) {
out.writeLine('</BODY></HTML>');
// Now clean up the doc array
functionDocArray = [];
functionDocArray = [];
}
/**
@@ -214,24 +150,7 @@ function processFunction(name, args, comment) {
"<P><BR><BR>";
}
/**
* Process a method being bound to a prototype.
* @param proto the name of the prototype
* @param name the name of the function
* @param args the args of the function as a single string
* @param comment the text of the comment
* @return a string for the HTML text of the documentation
*/
function processPrototypeMethod(proto, name, args, comment) {
if (debug)
print("Processing " + proto + ".prototype." + name + " " + args + " " + comment);
return "<H2> Method " + proto + ".prototype." + name + "</H2>" +
"<PRE>" +
proto + ".prototype." + name + " = function(" + args + ")" +
"</PRE>" +
processComment(comment,0,name) +
"<P><BR><BR>";
}
/**
@@ -244,11 +163,11 @@ function processPrototypeMethod(proto, name, args, comment) {
function processComment(comment,firstLine,fname) {
var tags = {};
// Use the "lambda" form of regular expression replace,
// where the replacement object is a function rather
// than a string. The function is called with the
// where the replacement object is a function rather
// than a string. The function is called with the
// matched text and any parenthetical matches as
// arguments, and the result of the function used as the
// replacement text.
// replacement text.
// Here we use the function to build up the "tags" object,
// which has a property for each "@" tag that is the name
// of the tag, and whose value is an array of the
@@ -260,9 +179,9 @@ function processComment(comment,firstLine,fname) {
tags[name] = a;
return "";
});
// if we have a comment at the beginning of a file
// store the comment for the index file
// store the comment for the index file
if (firstLine) {
indexFileArray[fname] = comment;
}
@@ -274,7 +193,7 @@ function processComment(comment,firstLine,fname) {
var params = "";
for (var i=0; i < array.length; i++) {
var m = array[i].match(/(\w+)\s+(.*)/);
params += '<TR><TD><I>'+m[1]+'</I></TD>' +
params += '<TR><TD><I>'+m[1]+'</I></TD>' +
'<TD>'+m[2]+'</TD></TR>';
}
out += '<TABLE WIDTH="90%" BORDER=1>';
@@ -326,7 +245,7 @@ function processComment(comment,firstLine,fname) {
out += '<DT><B>Last modified:</B><DD>';
out += '<script><!--\n';
out += 'document.writeln(document.lastModified);\n';
out += '// ---></script>\n';
out += '// ---></script>\n';
out += '</DL><P>';
}
@@ -338,9 +257,9 @@ function processComment(comment,firstLine,fname) {
* Create an html output file
* @param outputdir directory to put the file
* @param htmlfile name of the file
*/
*/
function CreateOutputFile(outputdir,htmlfile)
{
{
if (outputdir==null)
{
var outname = htmlfile;
@@ -355,18 +274,18 @@ function CreateOutputFile(outputdir,htmlfile)
}
/**
* Process a javascript file. Puts the generated HTML file in the outdir
* Process a javascript file. Puts the generated HTML file in the outdir
* @param filename name of the javascript file
* @inputdir input directory of the file (default null)
*/
function processJSFile(filename,inputdir)
function processJSFile(filename,inputdir)
{
if (debug) print("filename = " + filename + " inputdir = " + inputdir);
if (!filename.match(/\.js$/)) {
print("Expected filename to end in '.js'; had instead " +
if (!filename.match(/\.js$/)) {
print("Expected filename to end in '.js'; had instead " +
filename + ". I don't treat the file.");
} else {
} else {
if (inputdir==null)
{
var inname = filename;
@@ -379,12 +298,12 @@ function processJSFile(filename,inputdir)
print("Processing file " + inname);
var f = new File(inname);
// create the output file
var htmlfile = filename.replace(/\.js$/, ".html");
var out = CreateOutputFile(outputdir,htmlfile);
processFile(f, filename, inputdir, out);
out.close();
}
@@ -398,7 +317,7 @@ function GenerateIndex(dirname)
{
// construct the files index file
var out = CreateOutputFile(outputdir,indexFile);
// write the beginning of the file
out.writeLine('<HTML><HEADER><TITLE>File Index - directory: ' + dirname + '</TITLE><BODY>');
out.writeLine('<H1>File Index - directory: ' + dirname + '</H1>\n');
@@ -412,7 +331,7 @@ function GenerateIndex(dirname)
// sort the index file array
var SortedFileArray = [];
for (var fname in indexFileArray)
SortedFileArray.push(fname);
SortedFileArray.push(fname);
SortedFileArray.sort();
for (var i=0; i < SortedFileArray.length; i++) {
@@ -427,10 +346,10 @@ function GenerateIndex(dirname)
}
out.writeLine('</TABLE></BODY></HTML>');
out.close();
// construct the functions index file
var out = CreateOutputFile(outputdir,indexFunction);
// write the beginning of the file
out.writeLine('<HTML><HEADER><TITLE>Function Index - directory: ' + dirname + '</TITLE><BODY>');
out.writeLine('<H1>Function Index - directory: ' + dirname + '</H1>\n');
@@ -438,11 +357,11 @@ function GenerateIndex(dirname)
out.writeLine('<TR BGCOLOR=0xdddddddd>');
out.writeLine('<TD><B>Function</B></TD>');
out.writeLine('<TD><B>Files</B></TD></TR>');
// sort the function array
var SortedFunctionArray = [];
for (var functionname in indexFunctionArray)
SortedFunctionArray.push(functionname);
SortedFunctionArray.push(functionname);
SortedFunctionArray.sort();
for (var j=0; j < SortedFunctionArray.length; j++) {
@@ -476,10 +395,10 @@ function PrintOptions()
// Main Script
// first read the arguments
// first read the arguments
if (! arguments)
PrintOptions();
for (var i=0; i < arguments.length; i++) {
if (debug) print("argument: + \'" + arguments[i] + "\'");
if (arguments[i].match(/^\-/)) {
@@ -489,7 +408,7 @@ for (var i=0; i < arguments.length; i++) {
outputdir = String(arguments[i+1]);
if (debug) print("outputdir: + \'" + outputdir + "\'");
i++;
i++;
}
else if (String(arguments[i])=="-i"){
// process all files in an input directory
@@ -510,16 +429,16 @@ if (debug) print("inputdir: + \'" + arguments[i+1] + "\'");
FileList.push(String(arguments[i]));
}
}
}
// first handle the single files
for (var i in FileList)
for (var i in FileList)
processJSFile(FileList[i],null);
// then handle the input directories
for (var j in DirList) {
var inputdir = String(DirList[j]);
print("Process input directory: " + inputdir);
// clean up index arrays
@@ -528,13 +447,13 @@ for (var j in DirList) {
// for the directory name get rid of ../../ or ..\..\
inputDirName = inputdir.replace(/\.\.\/|\.\.\\/g,"");
indexFile = indexFileName + "_" + inputDirName + ".html";
indexFunction = indexFunctionName + "_" + inputDirName + ".html";
print("indexFile = " + indexFile);
print("indexFunction = " + indexFunction);
// read the files in the directory
var DirFile = new java.io.File(inputdir);
var lst = DirFile.list();
@@ -543,7 +462,7 @@ print("indexFunction = " + indexFunction);
for (var i=0; i < lst.length; i++)
{
processJSFile(String(lst[i]),inputdir);
}
}
// generate the index files for the input directory
GenerateIndex(inputDirName);

View File

@@ -1,44 +1,9 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
/**
* liveConnect.js: a simple demonstration of JavaScript-to-Java connectivity
*/
// Create a new StringBuffer. Note that the class name must be fully qualified
// by its package. Packages other than "java" must start with "Packages", i.e.,
// by its package. Packages other than "java" must start with "Packages", i.e.,
// "Packages.javax.servlet...".
var sb = new java.lang.StringBuffer();
@@ -51,4 +16,4 @@ sb.append(true);
// Now print it out. (The toString() method of sb is automatically called
// to convert the buffer to a string.)
// Should print "hi, mom3.0true".
print(sb);
print(sb);

View File

@@ -1,43 +1,8 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
// unique.js: read the contents of a file and print out the unique lines
defineClass("File")
// "arguments[0]" refers to the first argument at the command line to the
// "arguments[0]" refers to the first argument at the command line to the
// script, if present. If not present, "arguments[0]" will be undefined,
// which will cause f to read from System.in.
var f = new File(arguments[0]);
@@ -50,4 +15,4 @@ while ((line = f.readLine()) != null) {
}
for (i in o) {
print(i);
}
}

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@@ -0,0 +1,112 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* This class implements the "arguments" object.
*
* See ECMA 10.1.8
*
* @see org.mozilla.javascript.NativeCall
* @author Norris Boyd
*/
class Arguments extends ScriptableObject {
public Arguments(NativeCall activation) {
this.activation = activation;
Scriptable parent = activation.getParentScope();
setParentScope(parent);
setPrototype(ScriptableObject.getObjectPrototype(parent));
args = activation.getOriginalArguments();
int length = args.length;
Object callee = activation.funObj;
defineProperty("length", new Integer(length),
ScriptableObject.DONTENUM);
defineProperty("callee", callee, ScriptableObject.DONTENUM);
hasCaller = activation.funObj.version <= Context.VERSION_1_3;
}
public String getClassName() {
return "Arguments";
}
public boolean has(String name, Scriptable start) {
return (hasCaller && name.equals("caller")) || super.has(name, start);
}
public boolean has(int index, Scriptable start) {
Object[] args = activation.getOriginalArguments();
return (0 <= index && index < args.length) || super.has(index, start);
}
public Object get(String name, Scriptable start) {
if (hasCaller && name.equals("caller")) {
NativeCall caller = activation.caller;
if (caller == null || caller.originalArgs == null)
return null;
return caller.get("arguments", caller);
}
return super.get(name, start);
}
public Object get(int index, Scriptable start) {
if (0 <= index && index < args.length) {
NativeFunction f = activation.funObj;
if (index < f.argCount)
return activation.get(f.names[index+1], activation);
return args[index];
}
return super.get(index, start);
}
public void put(String name, Scriptable start, Object value) {
if (name.equals("caller")) {
// Set "hasCaller" to false so that we won't look up a
// computed value.
hasCaller = false;
}
super.put(name, start, value);
}
public void put(int index, Scriptable start, Object value) {
if (0 <= index && index < args.length) {
NativeFunction f = activation.funObj;
if (index < f.argCount)
activation.put(f.names[index+1], activation, value);
else
args[index] = value;
return;
}
super.put(index, start, value);
}
public void delete(String name) {
if (name.equals("caller"))
hasCaller = false;
super.delete(name);
}
private NativeCall activation;
private Object[] args;
private boolean hasCaller;
}

View File

@@ -0,0 +1,58 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
final class BinaryDigitReader {
int lgBase; // Logarithm of base of number
int digit; // Current digit value in radix given by base
int digitPos; // Bit position of last bit extracted from digit
String digits; // String containing the digits
int start; // Index of the first remaining digit
int end; // Index past the last remaining digit
BinaryDigitReader(int base, String digits, int start, int end) {
lgBase = 0;
while (base != 1) {
lgBase++;
base >>= 1;
}
digitPos = 0;
this.digits = digits;
this.start = start;
this.end = end;
}
/* Return the next binary digit from the number or -1 if done */
int getNextBinaryDigit()
{
if (digitPos == 0) {
if (start == end)
return -1;
char c = digits.charAt(start++);
if ('0' <= c && c <= '9')
digit = c - '0';
else if ('a' <= c && c <= 'z')
digit = c - 'a' + 10;
else digit = c - 'A' + 10;
digitPos = lgBase;
}
return digit >> --digitPos & 1;
}
}

View File

@@ -0,0 +1,32 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
// API class
package org.mozilla.javascript;
/**
* Thrown if errors are detected while attempting to define a host object
* from a Java class.
*/
public class ClassDefinitionException extends Exception {
public ClassDefinitionException(String detail) {
super(detail);
}
}

View File

@@ -0,0 +1,38 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
public interface ClassNameHelper {
public String getTargetClassFileName();
public void setTargetClassFileName(String classFileName);
public String getTargetPackage();
public void setTargetPackage(String targetPackage);
public String getTargetClassFileName(String className);
public String getGeneratingDirectory();
public void setTargetExtends(Class extendsClass);
public void setTargetImplements(Class[] implementsClasses);
}

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@@ -0,0 +1,75 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* This interface supports low-level per statement debug hooks
* <p>
* This interface can be implemented and used to do statement level
* interrupting and trapping of executing scripts.
* org.mozilla.javascript.debug.IDebugManager uses this system and provides
* a higher level abstraction more appropriate as a debugger API.
*
* @see org.mozilla.javascript.Context#setBytecodeHook
* @see org.mozilla.javascript.debug.IDebugManager
* @author John Bandhauer
*/
public interface DeepBytecodeHook
{
/**
* Possible hook return values.
*/
/**
* The executing script should continue.
*/
public static final int CONTINUE = 0;
/**
* The executing script should throw the object passed back in
* retVal[0]. This must be an object derived from java.lang.Throwable.
*/
public static final int THROW = 1;
/**
* The executing script should immediately return the object passed
* back in retVal[0].
*/
public static final int RETURN_VALUE = 2;
/**
* Handle trap.
*
* @param cx current context
* @param pc current program counter
* @param retVal single Object array to hold return value or exception
* @return one of {CONTINUE | THROW | RETURN_VALUE}
*/
public int trapped(Context cx, int pc, Object[] retVal);
/**
* Handle interrupt.
*
* @param cx current context
* @param pc current program counter
* @param retVal single Object array to hold return value or exception
* @return one of {CONTINUE | THROW | RETURN_VALUE}
*/
public int interrupted(Context cx, int pc, Object[] retVal);
}

View File

@@ -0,0 +1,59 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* This interface supports low-level call debug hooks
* <p>
* This interface can be implemented and used to hook JavaScript
* function calls. org.mozilla.javascript.debug.IDebugManager uses this
* system and provides a higher level abstraction more appropriate
* as a debugger API.
*
* @see org.mozilla.javascript.Context#setCallHook
* @see org.mozilla.javascript.debug.IDebugManager
* @author John Bandhauer
*/
public interface DeepCallHook
{
/**
* Notification that a function is about to be called.
*
* @param cx current context
* @param fun function to be called
* @param thisArg the 'this' of the object
* @param args constructor arguments array
* @return arbitrary object which is subsequently passed to postCall
* @see org.mozilla.javascript.debug.NativeDelegate#callDebug
*/
public Object preCall(Context cx, Object fun, Object thisArg, Object[] args);
/**
* Notification that a call returned.
*
* @param cx current context
* @param ref value returned from previous call to preCall
* @param retVal value returned by the callee (null if exception thrown)
* @param e exception thrown by callee (null if none thrown)
* @see org.mozilla.javascript.debug.NativeDelegate#callDebug
*/
public void postCall(Context cx, Object ref, Object retVal,
JavaScriptException e);
}

View File

@@ -0,0 +1,53 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* This interface supports low-level error reporter hooks.
* <p>
* This interface can be implemented and used to hook calls to the
* error reporter. org.mozilla.javascript.debug.IDebugManager uses this
* system and provides a higher level abstraction more appropriate
* as a debugger API.
*
* @see org.mozilla.javascript.Context#setErrorReporterHook
* @see org.mozilla.javascript.debug.IDebugManager
* @author John Bandhauer
*/
public interface DeepErrorReporterHook extends ErrorReporter
{
/**
* Change the current error reporter.
*
* @return the previous error reporter
* @see org.mozilla.javascript.ErrorReporter
* @see org.mozilla.javascript.Context#setErrorReporter
*/
public ErrorReporter setErrorReporter(ErrorReporter reporter);
/**
* Get the current error reporter.
*
* @see org.mozilla.javascript.ErrorReporter
* @see org.mozilla.javascript.Context#getErrorReporter
*/
public ErrorReporter getErrorReporter();
}

View File

@@ -0,0 +1,58 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* This interface supports low-level execute debug hooks.
* <p>
* This interface can be implemented and used to hook JavaScript
* script execution. org.mozilla.javascript.debug.IDebugManager uses this
* system and provides a higher level abstraction more appropriate
* as a debugger API.
*
* @see org.mozilla.javascript.Context#setExecuteHook
* @see org.mozilla.javascript.debug.IDebugManager
* @author John Bandhauer
*/
public interface DeepExecuteHook
{
/**
* Notification that a top-level script is about to be executed.
*
* @param cx current context
* @param fun script
* @param scope scope
* @return arbitrary object which is subsequently passed to postExecute
* @see org.mozilla.javascript.debug.NativeDelegate#executeDebug
*/
public Object preExecute(Context cx, NativeFunction fun, Scriptable scope);
/**
* Notification that a top-level script execution returned.
*
* @param cx current context
* @param ref value returned from previous call to preExecute
* @param retVal value returned by the script (null if exception thrown)
* @param e exception thrown by script (null if none thrown)
* @see org.mozilla.javascript.debug.NativeDelegate#executeDebug
*/
public void postExecute(Context cx, Object ref, Object retVal,
JavaScriptException e);
}

View File

@@ -0,0 +1,59 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* This interface supports low-level new object debug hooks.
* <p>
* This interface can be implemented and used to hook JavaScript
* object creation; i.e. calls for JavaScript constructor
* functions. org.mozilla.javascript.debug.IDebugManager uses this
* system and provides a higher level abstraction more appropriate
* as a debugger API.
*
* @see org.mozilla.javascript.Context#setNewObjectHook
* @see org.mozilla.javascript.debug.IDebugManager
* @author John Bandhauer
*/
public interface DeepNewObjectHook
{
/**
* Notification that a constructor is about to be called.
*
* @param cx current context
* @param fun constructor function
* @param args constructor arguments array
* @return arbitrary object which is subsequently passed to postNewObject
* @see org.mozilla.javascript.debug.NativeDelegate#newObjectDebug
*/
public Object preNewObject(Context cx, Object fun, Object[] args);
/**
* Notification that a constructor returned.
*
* @param cx current context
* @param ref value returned from previous call to preNewObject
* @param retVal value returned by the constructor (null if exception thrown)
* @param e exception thrown by constructor (null if none thrown)
* @see org.mozilla.javascript.debug.NativeDelegate#newObjectDebug
*/
public void postNewObject(Context cx, Object ref, Scriptable retVal,
Exception e);
}

View File

@@ -0,0 +1,57 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* This interface supports low-level script load/unload debug hooks.
* <p>
* This interface can be implemented and used to hook script loading
* and unloading. org.mozilla.javascript.debug.IDebugManager uses this
* system and provides a higher level abstraction more appropriate
* as a debugger API.
*
* @see org.mozilla.javascript.Context#setScriptHook
* @see org.mozilla.javascript.debug.IDebugManager
* @author John Bandhauer
*/
public interface DeepScriptHook
{
/**
* Notification that a script is being loaded.
*
* @param cx current context
* @param obj script or function being loaded
*/
public void loadingScript(Context cx, NativeFunction obj);
/**
* Notification that a script is being unloaded.
* <p>
* NOTE: this currently happens as part of the Java garbage
* collection process; i.e. it is called by the finalize method
* of the script and is thus likely to be called on a system
* thread. Also, this is thus not likely to be called if there are
* any outstanding references to the script.
*
* @param cx context which originally loaded the script
* @param obj script or function being unloaded
*/
public void unloadingScript(Context cx, NativeFunction obj);
}

View File

@@ -0,0 +1,46 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* This is the default error reporter for JavaScript.
*
* @author Norris Boyd
*/
class DefaultErrorReporter implements ErrorReporter {
public void warning(String message, String sourceName, int line,
String lineSource, int lineOffset)
{
// do nothing
}
public void error(String message, String sourceName, int line,
String lineSource, int lineOffset)
{
throw new EvaluatorException(message);
}
public EvaluatorException runtimeError(String message, String sourceName,
int line, String lineSource,
int lineOffset)
{
return new EvaluatorException(message);
}
}

View File

@@ -0,0 +1,86 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
// API class
package org.mozilla.javascript;
/**
* This is interface defines a protocol for the reporting of
* errors during JavaScript translation or execution.
*
* @author Norris Boyd
*/
public interface ErrorReporter {
/**
* Report a warning.
*
* The implementing class may choose to ignore the warning
* if it desires.
*
* @param message a String describing the warning
* @param sourceName a String describing the JavaScript source
* where the warning occured; typically a filename or URL
* @param line the line number associated with the warning
* @param lineSource the text of the line (may be null)
* @param lineOffset the offset into lineSource where problem was detected
*/
void warning(String message, String sourceName, int line,
String lineSource, int lineOffset);
/**
* Report an error.
*
* The implementing class is free to throw an exception if
* it desires.
*
* If execution has not yet begun, the JavaScript engine is
* free to find additional errors rather than terminating
* the translation. It will not execute a script that had
* errors, however.
*
* @param message a String describing the error
* @param sourceName a String describing the JavaScript source
* where the error occured; typically a filename or URL
* @param line the line number associated with the error
* @param lineSource the text of the line (may be null)
* @param lineOffset the offset into lineSource where problem was detected
*/
void error(String message, String sourceName, int line,
String lineSource, int lineOffset);
/**
* Creates an EvaluatorException that may be thrown.
*
* runtimeErrors, unlike errors, will always terminate the
* current script.
*
* @param message a String describing the error
* @param sourceName a String describing the JavaScript source
* where the error occured; typically a filename or URL
* @param line the line number associated with the error
* @param lineSource the text of the line (may be null)
* @param lineOffset the offset into lineSource where problem was detected
* @return an EvaluatorException that will be thrown.
*/
EvaluatorException runtimeError(String message, String sourceName,
int line, String lineSource,
int lineOffset);
}

View File

@@ -0,0 +1,38 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
/**
* The class of exceptions thrown by the JavaScript engine.
*/
public class EvaluatorException extends RuntimeException {
/**
* Create an exception with the specified detail message.
*
* Errors internal to the JavaScript engine will simply throw a
* RuntimeException.
*
* @param detail a message with detail about the exception
*/
public EvaluatorException(String detail) {
super(detail);
}
}

View File

@@ -0,0 +1,322 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
// API class
package org.mozilla.javascript;
import java.util.Hashtable;
import java.util.Enumeration;
/**
* Manipulate a Scriptable object as if its prototype chain were flattened.
* <p>
* Compared to the Scriptable interface, FlattenedObject provides a view of
* Scriptable objects that is easier to use and more closely matches a script
* writer's view of a JavaScript object. <p>
*
* A FlattenedObject is "flattened" in the sense that multiple objects in a
* prototype chain appear to have their properties all appear in the
* FlattenedObject. <p>
*
* Another convenience provided by Flattened object is the ability to access
* properties by a single java.lang.Object id. This id is then converted into
* a String or an int before methods of the Scriptable object are called.
*
* @see org.mozilla.javascript.Scriptable
*
* @author Norris Boyd
*/
public class FlattenedObject {
/**
* Construct a new FlattenedObject.
*
* @param object the object to be viewed with flattened properties
*/
public FlattenedObject(Scriptable object) {
this.obj = object;
}
/**
* Get the associated Scriptable object.
*/
public Scriptable getObject() {
return obj;
}
/**
* Determine if a property exists in an object.
*
* This is a more convenient (and less efficient) form than
* <code>Scriptable.has()</code>.
* It returns true if and only if the property
* exists in this object or any of the objects in its prototype
* chain.
*
* @param id the property index, which may be either a String or a
* Number
* @return true if and only if the property exists in the prototype
* chain
* @see org.mozilla.javascript.Scriptable#has
*/
public boolean hasProperty(Object id) {
String stringId = ScriptRuntime.toString(id);
String s = ScriptRuntime.getStringId(stringId);
if (s == null)
return getBase(obj, ScriptRuntime.getIntId(stringId)) != null;
return getBase(obj, s) != null;
}
/**
* Get a property of an object.
* <p>
* This is a more convenient (and less efficient) form than
* <code>Scriptable.get()</code>. It corresponds exactly to the
* expression <code>obj[id]</code> in JavaScript. This method
* will traverse the prototype chain of an object to find the
* property.<p>
*
* If the property does not exist in the object or its prototype
* chain, the undefined value will be returned.
*
* @param id the property index; can be a String or a Number; the
* String may contain characters representing a number
* @return the value of the property or the undefined value
* @see org.mozilla.javascript.Scriptable#get
* @see org.mozilla.javascript.Context#getUndefinedValue
*/
public Object getProperty(Object id) {
String s = ScriptRuntime.getStringId(id);
int index = s == null ? ScriptRuntime.getIntId(id) : 0;
Scriptable m = obj;
Object result;
for(;;) {
result = s == null ? m.get(index, obj) : m.get(s, obj);
if (result != Scriptable.NOT_FOUND)
break;
m = m.getPrototype();
if (m == null)
return Undefined.instance;
}
if (result instanceof Scriptable)
return new FlattenedObject((Scriptable) result);
return result;
}
/**
* Set a property of an object.
*
* This is a more convenient (and less efficient) form than that
* provided in Scriptable. It corresponds exactly to the
* expression <code>obj[id] = val</code> in JavaScript.<p>
*
* @param id the property index, which may be either a String or
* a Number
* @param value the value of the property
* @see org.mozilla.javascript.Scriptable#put
*/
public void putProperty(Object id, Object value) {
String s = ScriptRuntime.getStringId(id);
if (value instanceof FlattenedObject)
value = ((FlattenedObject) value).getObject();
Scriptable x;
if (s == null) {
int index = ScriptRuntime.getIntId(id);
x = getBase(obj, index);
if (x == null)
x = obj;
x.put(index, obj, value);
return;
}
x = getBase(obj, s);
if (x == null)
x = obj;
x.put(s, obj, value);
}
/**
* Remove a property.
*
* This method provides the functionality of the <code>delete</code>
* operator in JavaScript.
*
* @param id the property index, which may be either a String or
* a Number
* @return true if the property didn't exist, or existed and was removed
* @see org.mozilla.javascript.Scriptable#delete
*/
public boolean deleteProperty(Object id) {
String s = ScriptRuntime.getStringId(id);
if (s == null) {
int index = ScriptRuntime.getIntId(id);
Scriptable base = getBase(obj, index);
if (base == null)
return true;
base.delete(index);
return !base.has(index, base);
}
Scriptable base = getBase(obj, s);
if (base == null)
return true;
base.delete(s);
return !base.has(s, base);
}
/**
* Return an array that contains the ids of the properties.
*
* <p>This method will walk the prototype chain and collect the
* ids of all objects in the prototype chain.<p>
*
* If an id appears in more than one object in the prototype chain,
* it will only be in the array once. (So all the entries in the
* array will be unique respective to equals().)
*
* @see org.mozilla.javascript.Scriptable#getIds
*/
public Object[] getIds() {
Hashtable h = new Hashtable(11);
Scriptable m = obj;
while (m != null) {
Object[] e = m.getIds();
for (int i=0; i < e.length; i++) {
h.put(e[i], Boolean.TRUE);
}
m = m.getPrototype();
}
Enumeration keys = h.keys();
Object elem;
Object[] result = new Object[h.size()];
int index = 0;
while (keys.hasMoreElements()) {
elem = keys.nextElement();
result[index++] = elem;
}
return result;
}
/**
* Consider this object to be a function, and call it.
*
* @param cx the current Context for this thread
* @param thisObj the JavaScript 'this' for the call
* @param args the arguments for the call
* @return the result of the JavaScript function call
* @exception NotAFunctionException if this object is not a function
* @exception JavaScriptException if an uncaught JavaScript exception
* occurred while executing the function
* @see org.mozilla.javascript.Function#call
*/
public Object call(Context cx, Scriptable thisObj, Object[] args)
throws NotAFunctionException,
JavaScriptException
{
if (!(obj instanceof Function)) {
throw new NotAFunctionException();
}
return ScriptRuntime.call(cx, obj, thisObj, args);
}
/**
* Consider this object to be a function, and invoke it as a
* constructor call.
*
* @param cx the current Context for this thread
* @param args the arguments for the constructor call
* @return the allocated object
* @exception NotAFunctionException if this object is not a function
* @exception JavaScriptException if an uncaught JavaScript exception
* occurred while executing the constructor
* @see org.mozilla.javascript.Function#construct
*/
public Scriptable construct(Context cx, Object[] args)
throws NotAFunctionException,
JavaScriptException
{
if (!(obj instanceof Function)) {
throw new NotAFunctionException();
}
return ScriptRuntime.newObject(cx, obj, args, null);
}
/**
* Get the property indicated by the id, and invoke it with the
* specified arguments.
* <p>
* For example, for a FlattenedObject <code>obj</code>,
* and a Java array <code>a</code> consisting of a single string
* <code>"hi"</code>, the call <pre>
* obj.callMethod("m", a)</pre>
* is equivalent to the JavaScript code <code>obj.m("hi")</code>.<p>
*
* If the property is not found or is not a function, an
* exception will be thrown.
*
* @param id the Number or String to use to find the function property
* to call
* @param args the arguments for the constructor call
* @return the result of the call
* @exception PropertyException if the designated property
* was not found
* @exception NotAFunctionException if this object is not a function
* @exception JavaScriptException if an uncaught JavaScript exception
* occurred while executing the method
* @see org.mozilla.javascript.Function#call
*/
public Object callMethod(Object id, Object[] args)
throws PropertyException,
NotAFunctionException,
JavaScriptException
{
if (!hasProperty(id)) {
throw new PropertyException(
Context.getMessage("msg.prop.not.found", null));
}
Object o = getProperty(id);
if (o instanceof FlattenedObject)
return ((FlattenedObject) o).call(Context.getContext(), obj, args);
throw new NotAFunctionException();
}
/****** End of API *******/
private static Scriptable getBase(Scriptable obj, String s) {
Scriptable m = obj;
while (m != null) {
if (m.has(s, obj))
return m;
m = m.getPrototype();
}
return null;
}
private static Scriptable getBase(Scriptable obj, int index) {
Scriptable m = obj;
while (m != null) {
if (m.has(index, obj))
return m;
m = m.getPrototype();
}
return null;
}
private Scriptable obj;
}

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@@ -0,0 +1,69 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
// API class
package org.mozilla.javascript;
/**
* This is interface that all functions in JavaScript must implement.
* The interface provides for calling functions and constructors.
*
* @see org.mozilla.javascript.Scriptable
* @author Norris Boyd
*/
public interface Function extends Scriptable {
/**
* Call the function.
*
* Note that the array of arguments is not guaranteed to have
* length greater than 0.
*
* @param cx the current Context for this thread
* @param scope the scope to execute the function relative to. This
* set to the value returned by getParentScope() except
* when the function is called from a closure.
* @param thisObj the JavaScript <code>this</code> object
* @param args the array of arguments
* @return the result of the call
* @exception JavaScriptException if an uncaught exception
* occurred while executing the function
*/
public Object call(Context cx, Scriptable scope, Scriptable thisObj,
Object[] args)
throws JavaScriptException;
/**
* Call the function as a constructor.
*
* This method is invoked by the runtime in order to satisfy a use
* of the JavaScript <code>new</code> operator. This method is
* expected to create a new object and return it.
*
* @param cx the current Context for this thread
* @param scope an enclosing scope of the caller except
* when the function is called from a closure.
* @param args the array of arguments
* @return the allocated object
* @exception JavaScriptException if an uncaught exception
* occurred while executing the constructor
*/
public Scriptable construct(Context cx, Scriptable scope, Object[] args)
throws JavaScriptException;
}

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@@ -0,0 +1,48 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
package org.mozilla.javascript;
import java.util.*;
public class FunctionNode extends Node {
public FunctionNode(String name, Node left, Node right) {
super(TokenStream.FUNCTION, left, right, name);
itsVariableTable = new VariableTable();
}
public String getFunctionName() {
return getString();
}
public VariableTable getVariableTable() {
return itsVariableTable;
}
public boolean requiresActivation() {
return itsNeedsActivation;
}
public boolean setRequiresActivation(boolean b) {
return itsNeedsActivation = b;
}
protected VariableTable itsVariableTable;
protected boolean itsNeedsActivation;
}

View File

@@ -0,0 +1,527 @@
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
// API class
package org.mozilla.javascript;
import java.util.Hashtable;
import java.util.Vector;
import java.lang.reflect.*;
public class FunctionObject extends NativeFunction {
/**
* Create a JavaScript function object from a Java method.
*
* <p>The <code>member</code> argument must be either a java.lang.reflect.Method
* or a java.lang.reflect.Constructor and must match one of two forms.<p>
*
* The first form is a member with zero or more parameters
* of the following types: Object, String, boolean, Scriptable,
* byte, short, int, long, float, or double. If the member is
* a Method, the return value must be void or one of the types
* allowed for parameters.<p>
*
* The runtime will perform appropriate conversions based
* upon the type of the parameter. A parameter type of
* Object specifies that no conversions are to be done. A parameter
* of type String will use Context.toString to convert arguments.
* Similarly, parameters of type double, boolean, and Scriptable
* will cause Context.toNumber, Context.toBoolean, and
* Context.toObject, respectively, to be called.<p>
*
* If the method is not static, the Java 'this' value will
* correspond to the JavaScript 'this' value. Any attempt
* to call the function with a 'this' value that is not
* of the right Java type will result in an error.<p>
*
* The second form is the variable arguments (or "varargs")
* form. If the FunctionObject will be used as a constructor,
* the member must have the following parameters
* <pre>
* (Context cx, Object[] args, Function ctorObj,
* boolean inNewExpr)</pre>
* and if it is a Method, be static and return an Object result.<p>
*
* Otherwise, if the FunctionObject will <i>not</i> be used to define a
* constructor, the member must be a static Method with parameters
* (Context cx, Scriptable thisObj, Object[] args,
* Function funObj) </pre>
* <pre>
* and an Object result.<p>
*
* When the function varargs form is called as part of a function call,
* the <code>args</code> parameter contains the
* arguments, with <code>thisObj</code>
* set to the JavaScript 'this' value. <code>funObj</code>
* is the function object for the invoked function.<p>
*
* When the constructor varargs form is called or invoked while evaluating
* a <code>new</code> expression, <code>args</code> contains the
* arguments, <code>ctorObj</code> refers to this FunctionObject, and
* <code>inNewExpr</code> is true if and only if a <code>new</code>
* expression caused the call. This supports defining a function that
* has different behavior when called as a constructor than when
* invoked as a normal function call. (For example, the Boolean
* constructor, when called as a function,
* will convert to boolean rather than creating a new object.)<p>
*
* @param name the name of the function
* @param methodOrConstructor a java.lang.reflect.Method or a java.lang.reflect.Constructor
* that defines the object
* @param scope enclosing scope of function
* @see org.mozilla.javascript.Scriptable
*/
public FunctionObject(String name, Member methodOrConstructor,
Scriptable scope)
{
String methodName;
if (methodOrConstructor instanceof Constructor) {
ctor = (Constructor) methodOrConstructor;
isStatic = true; // well, doesn't take a 'this'
types = ctor.getParameterTypes();
methodName = ctor.getName();
} else {
method = (Method) methodOrConstructor;
isStatic = Modifier.isStatic(method.getModifiers());
types = method.getParameterTypes();
methodName = method.getName();
}
String myNames[] = { name };
super.names = myNames;
int length;
if (types.length == 4 && (types[1].isArray() || types[2].isArray())) {
// Either variable args or an error.
if (types[1].isArray()) {
if (!isStatic ||
types[0] != Context.class ||
types[1].getComponentType() != ScriptRuntime.ObjectClass ||
types[2] != ScriptRuntime.FunctionClass ||
types[3] != Boolean.TYPE)
{
String[] args = { methodName };
String message = Context.getMessage("msg.varargs.ctor",
args);
throw Context.reportRuntimeError(message);
}
parmsLength = VARARGS_CTOR;
} else {
if (!isStatic ||
types[0] != Context.class ||
types[1] != ScriptRuntime.ScriptableClass ||
types[2].getComponentType() != ScriptRuntime.ObjectClass ||
types[3] != ScriptRuntime.FunctionClass)
{
String[] args = { methodName };
String message = Context.getMessage("msg.varargs.fun",
args);
throw Context.reportRuntimeError(message);
}
parmsLength = VARARGS_METHOD;
}
// XXX check return type
length = 1;
} else {
parmsLength = (short) types.length;
boolean hasConversions = false;
for (int i=0; i < parmsLength; i++) {
Class type = types[i];
if (type == ScriptRuntime.ObjectClass) {
// may not need conversions
} else if (type == ScriptRuntime.StringClass ||
type == ScriptRuntime.BooleanClass ||
ScriptRuntime.NumberClass.isAssignableFrom(type) ||
Scriptable.class.isAssignableFrom(type))
{
hasConversions = true;
} else if (type == Boolean.TYPE) {
hasConversions = true;
types[i] = ScriptRuntime.BooleanClass;
} else if (type == Byte.TYPE) {
hasConversions = true;
types[i] = ScriptRuntime.ByteClass;
} else if (type == Short.TYPE) {
hasConversions = true;
types[i] = ScriptRuntime.ShortClass;
} else if (type == Integer.TYPE) {
hasConversions = true;
types[i] = ScriptRuntime.IntegerClass;
} else if (type == Float.TYPE) {
hasConversions = true;
types[i] = ScriptRuntime.FloatClass;
} else if (type == Double.TYPE) {
hasConversions = true;
types[i] = ScriptRuntime.DoubleClass;
} else {
Object[] errArgs = { methodName };
throw Context.reportRuntimeError(
Context.getMessage("msg.bad.parms", errArgs));
}
}
if (!hasConversions)
types = null;
length = parmsLength;
}
// Initialize length property
lengthPropertyValue = (short) length;
hasVoidReturn = method != null && method.getReturnType() == Void.TYPE;
this.argCount = (short) length;
setParentScope(scope);
setPrototype(getFunctionPrototype(scope));
}
/**
* Override ScriptableObject's has, get, and set in order to define
* the "length" property of the function. <p>
*
* We could also have defined the property using ScriptableObject's
* defineProperty method, but that would have consumed a slot in every
* FunctionObject. Most FunctionObjects typically don't have any
* properties anyway, so having the "length" property would cause us
* to allocate an array of slots. <p>
*
* In particular, this method will return true for
* <code>name.equals("length")</code>
* and will delegate to the superclass for all other
* values of <code>name</code>.
*/
public boolean has(String name, Scriptable start) {
return name.equals("length") || super.has(name, start);
}
/**
* Override ScriptableObject's has, get, and set in order to define
* the "length" property of the function. <p>
*
* In particular, this method will return the value defined by
* the method used to construct the object (number of parameters
* of the method, or 1 if the method is a "varargs" form), unless
* setLength has been called with a new value.
*
* @see org.mozilla.javascript.FunctionObject#setLength
*/
public Object get(String name, Scriptable start) {
if (name.equals("length"))
return new Integer(lengthPropertyValue);
return super.get(name, start);
}
/**
* Override ScriptableObject's has, get, and set in order to define
* the "length" property of the function. <p>
*
* In particular, this method will ignore all attempts to set the
* "length" property and forward all other requests to ScriptableObject.
*
* @see org.mozilla.javascript.FunctionObject#setLength
*/
public void put(String name, Scriptable start, Object value) {
if (!name.equals("length"))
super.put(name, start, value);
}
/**
* Set the value of the "length" property.
*
* <p>Changing the value of the "length" property of a FunctionObject only
* affects the value retrieved from get() and does not affect the way
* the method itself is called. <p>
*
* The "length" property will be defined by default as the number
* of parameters of the method used to construct the FunctionObject,
* unless the method is a "varargs" form, in which case the "length"
* property will be defined to 1.
*
* @param length the new length
*/
public void setLength(short length) {
lengthPropertyValue = length;
}
// TODO: Make not public
/**
* Finds methods of a given name in a given class.
*
* <p>Searches <code>clazz</code> for methods with name
* <code>name</code>. Maintains a cache so that multiple
* lookups on the same class are cheap.
*
* @param clazz the class to search
* @param name the name of the methods to find
* @return an array of the found methods, or null if no methods
* by that name were found.
* @see java.lang.Class#getMethods
*/
public static Method[] findMethods(Class clazz, String name) {
Vector v = new Vector(5);
Method[] methods = clazz.getMethods();
for (int i=0; i < methods.length; i++) {
if (methods[i].getDeclaringClass() == clazz &&
methods[i].getName().equals(name)){
v.addElement(methods[i]);
}
}
if (v.size() == 0) {
return null;
}
Method[] result = new Method[v.size()];
v.copyInto(result);
return result;
}
/**
* Define this function as a JavaScript constructor.
* <p>
* Sets up the "prototype" and "constructor" properties. Also
* calls setParent and setPrototype with appropriate values.
* Then adds the function object as a property of the given scope, using
* <code>prototype.getClassName()</code>
* as the name of the property.
*
* @param scope the scope in which to define the constructor (typically
* the global object)
* @param prototype the prototype object
* @see org.mozilla.javascript.Scriptable#setParentScope
* @see org.mozilla.javascript.Scriptable#setPrototype
* @see org.mozilla.javascript.Scriptable#getClassName
*/
public void addAsConstructor(Scriptable scope, Scriptable prototype) {
setParentScope(scope);
setPrototype(getFunctionPrototype(scope));
prototype.setParentScope(this);
final int attr = ScriptableObject.DONTENUM |
ScriptableObject.PERMANENT |
ScriptableObject.READONLY;
defineProperty("prototype", prototype, attr);
String name = prototype.getClassName();
if (!name.equals("With")) {
// A "With" object would delegate these calls to the prototype:
// not the right thing to do here!
if (prototype instanceof ScriptableObject) {
((ScriptableObject) prototype).defineProperty("constructor",
this, attr);
} else {
prototype.put("constructor", prototype, this);
}
}
if (scope instanceof ScriptableObject) {
((ScriptableObject) scope).defineProperty(name, this,
ScriptableObject.DONTENUM);
} else {
scope.put(name, scope, this);
}
setParentScope(scope);
}
static public Object convertArg(Scriptable scope,
Object arg, Class desired)
{
if (desired == ScriptRuntime.BooleanClass
|| desired == Boolean.TYPE)
return ScriptRuntime.toBoolean(arg) ? Boolean.TRUE
: Boolean.FALSE;
else if (desired == ScriptRuntime.StringClass)
return ScriptRuntime.toString(arg);
else if (desired == ScriptRuntime.IntegerClass
|| desired == Integer.TYPE)
return new Integer(ScriptRuntime.toInt32(arg));
else if (desired == ScriptRuntime.DoubleClass
|| desired == Double.TYPE)
return new Double(ScriptRuntime.toNumber(arg));
else if (desired == ScriptRuntime.ScriptableClass)
return ScriptRuntime.toObject(scope, arg);
else {
Object[] errArgs = { desired.getName() };
throw Context.reportRuntimeError(
Context.getMessage("msg.cant.convert", errArgs));
}
}
/**
* Performs conversions on argument types if needed and
* invokes the underlying Java method or constructor.
* <p>
* Implements Function.call.
*
* @see org.mozilla.javascript.Function#call
* @exception JavaScriptException if the underlying Java method or constructor
* threw an exception
*/
public Object call(Context cx, Scriptable scope, Scriptable thisObj,
Object[] args)
throws JavaScriptException
{
if (parmsLength < 0)
return callVarargs(cx, thisObj, args, false);
if (!isStatic) {
// OPT: cache "clazz"?
Class clazz = method != null ? method.getDeclaringClass()
: ctor.getDeclaringClass();
Scriptable p = thisObj;
while (p != null && !clazz.isInstance(p)) {
// Walk up the prototype chain to find an object to call the
// method on
p = p.getPrototype();
}
if (p == null) {
// Couldn't find an object to call this on.
Object[] errArgs = { names[0] };
throw Context.reportRuntimeError(
Context.getMessage("msg.incompat.call", errArgs));
}
thisObj = p;
}
Object[] invokeArgs;
int i;
if (parmsLength == args.length) {
invokeArgs = args;
// avoid copy loop if no conversions needed
i = (types == null) ? parmsLength : 0;
} else {
invokeArgs = new Object[parmsLength];
i = 0;
}
for (; i < parmsLength; i++) {
Object arg = (i < args.length)
? args[i]
: Undefined.instance;
if (types != null) {
arg = convertArg(this, arg, types[i]);
}
invokeArgs[i] = arg;
}
try {
Object result = (method != null)
? method.invoke(thisObj, invokeArgs)
: ctor.newInstance(invokeArgs);
return hasVoidReturn ? Undefined.instance : result;
}
catch (InvocationTargetException e) {
throw JavaScriptException.wrapException(scope, e);
}
catch (IllegalAccessException e) {
throw WrappedException.wrapException(e);
}
catch (InstantiationException e) {
throw WrappedException.wrapException(e);
}
}
/**
* Performs conversions on argument types if needed and
* invokes the underlying Java method or constructor
* to create a new Scriptable object.
* <p>
* Implements Function.construct.
*
* @param cx the current Context for this thread
* @param scope the scope to execute the function relative to. This
* set to the value returned by getParentScope() except
* when the function is called from a closure.
* @param args arguments to the constructor
* @see org.mozilla.javascript.Function#construct
* @exception JavaScriptException if the underlying Java method or constructor
* threw an exception
*/
public Scriptable construct(Context cx, Scriptable scope, Object[] args)
throws JavaScriptException
{
if (method == null || parmsLength == VARARGS_CTOR) {
Scriptable result;
if (method != null) {
// Ugly: allow variable-arg constructors that need access to the
// scope to get it from the Context. Cleanest solution would be
// to modify the varargs form, but that would require users with
// the old form to change their code.
cx.ctorScope = scope;
result = (Scriptable) callVarargs(cx, null, args, true);
cx.ctorScope = null;
} else {
result = (Scriptable) call(cx, scope, null, args);
}
if (result.getPrototype() == null)
result.setPrototype(getClassPrototype());
if (result.getParentScope() == null) {
Scriptable parent = getParentScope();
if (result != parent)
result.setParentScope(parent);
}
return result;
}
return super.construct(cx, scope, args);
}
private Object callVarargs(Context cx, Scriptable thisObj, Object[] args,
boolean inNewExpr)
throws JavaScriptException
{
try {
if (parmsLength == VARARGS_METHOD) {
Object[] invokeArgs = { cx, thisObj, args, this };
Object result = method.invoke(null, invokeArgs);
return hasVoidReturn ? Undefined.instance : result;
} else {
Boolean b = inNewExpr ? Boolean.TRUE : Boolean.FALSE;
Object[] invokeArgs = { cx, args, this, b };
return (method == null)
? ctor.newInstance(invokeArgs)
: method.invoke(null, invokeArgs);
}
}
catch (InvocationTargetException e) {
Throwable target = e.getTargetException();
if (target instanceof EvaluatorException)
throw (EvaluatorException) target;
Scriptable scope = thisObj == null ? this : thisObj;
throw JavaScriptException.wrapException(scope, target);
}
catch (IllegalAccessException e) {
throw WrappedException.wrapException(e);
}
catch (InstantiationException e) {
throw WrappedException.wrapException(e);
}
}
boolean isVarArgsMethod() {
return parmsLength == VARARGS_METHOD;
}
boolean isVarArgsConstructor() {
return parmsLength == VARARGS_CTOR;
}
private static final short VARARGS_METHOD = -1;
private static final short VARARGS_CTOR = -2;
Method method;
Constructor ctor;
private Class[] types;
private short parmsLength;
private short lengthPropertyValue;
private boolean hasVoidReturn;
private boolean isStatic;
}

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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
// API class
package org.mozilla.javascript;
import java.util.Vector;
/**
* Class ImporterTopLevel
*
* This class defines a ScriptableObject that can be instantiated
* as a top-level ("global") object to provide functionality similar
* to Java's "import" statement.
* <p>
* This class can be used to create a top-level scope using the following code:
* <pre>
* Scriptable scope = cx.initStandardObjects(new ImporterTopLevel());
* </pre>
* Then JavaScript code will have access to the following methods:
* <ul>
* <li>importClass - will "import" a class by making its unqualified name
* available as a property of the top-level scope
* <li>importPackage - will "import" all the classes of the package by
* searching for unqualified names as classes qualified
* by the given package.
* </ul>
* The following code from the shell illustrates this use:
* <pre>
* js> importClass(java.io.File)
* js> f = new File('help.txt')
* help.txt
* js> importPackage(java.util)
* js> v = new Vector()
* []
*
* @author Norris Boyd
*/
public class ImporterTopLevel extends ScriptableObject {
public ImporterTopLevel() {
String[] names = { "importClass", "importPackage" };
try {
this.defineFunctionProperties(names, ImporterTopLevel.class,
ScriptableObject.DONTENUM);
} catch (PropertyException e) {
throw new Error(); // should never happen
}
}
public String getClassName() {
return "global";
}
public Object get(String name, Scriptable start) {
Object result = super.get(name, start);
if (result == NOT_FOUND && importedPackages != null) {
for (int i=0; i < importedPackages.size(); i++) {
Object o = importedPackages.elementAt(i);
NativeJavaPackage p = (NativeJavaPackage) o;
Object v = p.getPkgProperty(name, start, false);
if (v != null && !(v instanceof NativeJavaPackage)) {
if (result == NOT_FOUND) {
result = v;
} else {
String[] args = { result.toString(), v.toString() };
throw Context.reportRuntimeError(
Context.getMessage("msg.ambig.import",
args));
}
}
}
}
return result;
}
public void importClass(Object cl) {
if (!(cl instanceof NativeJavaClass)) {
String[] args = { Context.toString(cl) };
throw Context.reportRuntimeError(
Context.getMessage("msg.not.class", args));
}
String s = ((NativeJavaClass) cl).getClassObject().getName();
String n = s.substring(s.lastIndexOf('.')+1);
if (this.has(n, this)) {
String[] args = { n };
throw Context.reportRuntimeError(
Context.getMessage("msg.prop.defined", args));
}
this.defineProperty(n, cl, DONTENUM);
}
public void importPackage(Object pkg) {
if (importedPackages == null)
importedPackages = new Vector();
if (!(pkg instanceof NativeJavaPackage)) {
String[] args = { Context.toString(pkg) };
throw Context.reportRuntimeError(
Context.getMessage("msg.not.pkg", args));
}
for (int i=0; i < importedPackages.size(); i++) {
if (pkg == importedPackages.elementAt(i))
return; // allready in list
}
importedPackages.addElement(pkg);
}
private Vector importedPackages;
}

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