922 lines
31 KiB
Java
922 lines
31 KiB
Java
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Rhino code, released
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* May 6, 1999.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1997-2000 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Norris Boyd
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* Frank Mitchell
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* Mike Shaver
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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package org.mozilla.javascript;
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import java.lang.reflect.*;
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import java.util.Hashtable;
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import java.util.Enumeration;
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/**
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* This class reflects non-Array Java objects into the JavaScript environment. It
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* reflect fields directly, and uses NativeJavaMethod objects to reflect (possibly
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* overloaded) methods.<p>
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*
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* @author Mike Shaver
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* @see NativeJavaArray
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* @see NativeJavaPackage
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* @see NativeJavaClass
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*/
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public class NativeJavaObject implements Scriptable, Wrapper {
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public NativeJavaObject(Scriptable scope, Object javaObject,
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JavaMembers members)
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{
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this.parent = scope;
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this.javaObject = javaObject;
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this.members = members;
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}
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public NativeJavaObject(Scriptable scope, Object javaObject,
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Class staticType)
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{
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this.parent = scope;
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this.javaObject = javaObject;
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Class dynamicType = javaObject != null ? javaObject.getClass()
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: staticType;
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members = JavaMembers.lookupClass(scope, dynamicType, staticType);
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fieldAndMethods = members.getFieldAndMethodsObjects(this, javaObject, false);
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}
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public boolean has(String name, Scriptable start) {
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return members.has(name, false);
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}
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public boolean has(int index, Scriptable start) {
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return false;
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}
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public Object get(String name, Scriptable start) {
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if (fieldAndMethods != null) {
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Object result = fieldAndMethods.get(name);
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if (result != null) {
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return result;
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}
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}
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// TODO: passing 'this' as the scope is bogus since it has
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// no parent scope
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return members.get(this, name, javaObject, false);
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}
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public Object get(int index, Scriptable start) {
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throw members.reportMemberNotFound(Integer.toString(index));
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}
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public void put(String name, Scriptable start, Object value) {
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members.put(name, javaObject, value, false);
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}
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public void put(int index, Scriptable start, Object value) {
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throw members.reportMemberNotFound(Integer.toString(index));
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}
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public boolean hasInstance(Scriptable value) {
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// This is an instance of a Java class, so always return false
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return false;
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}
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public void delete(String name) {
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}
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public void delete(int index) {
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}
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public Scriptable getPrototype() {
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if (prototype == null && javaObject.getClass() == ScriptRuntime.StringClass) {
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return ScriptableObject.getClassPrototype(parent, "String");
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}
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return prototype;
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}
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/**
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* Sets the prototype of the object.
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*/
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public void setPrototype(Scriptable m) {
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prototype = m;
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}
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/**
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* Returns the parent (enclosing) scope of the object.
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*/
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public Scriptable getParentScope() {
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return parent;
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}
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/**
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* Sets the parent (enclosing) scope of the object.
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*/
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public void setParentScope(Scriptable m) {
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parent = m;
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}
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public Object[] getIds() {
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return members.getIds(false);
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}
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public static Object wrap(Scriptable scope, Object obj, Class staticType)
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{
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if (obj == null)
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return obj;
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Context cx = Context.getCurrentContext();
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if (cx != null && cx.wrapHandler != null) {
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Object result = cx.wrapHandler.wrap(scope, obj, staticType);
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if (result != null)
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return result;
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}
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Class cls = obj.getClass();
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if (staticType != null && staticType.isPrimitive()) {
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if (staticType == Void.TYPE)
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return Undefined.instance;
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if (staticType == Character.TYPE)
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return new Integer((int) ((Character) obj).charValue());
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return obj;
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}
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if (cls.isArray())
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return NativeJavaArray.wrap(scope, obj);
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if (obj instanceof Scriptable)
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return obj;
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if (Context.useJSObject && jsObjectClass != null &&
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staticType != jsObjectClass && jsObjectClass.isInstance(obj))
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{
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try {
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return jsObjectGetScriptable.invoke(obj, ScriptRuntime.emptyArgs);
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}
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catch (InvocationTargetException e) {
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// Just abandon conversion from JSObject
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}
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catch (IllegalAccessException e) {
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// Just abandon conversion from JSObject
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}
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}
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return new NativeJavaObject(scope, obj, staticType);
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}
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public Object unwrap() {
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return javaObject;
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}
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public String getClassName() {
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return "JavaObject";
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}
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Function getConverter(String converterName) {
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Object converterFunction = get(converterName, this);
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if (converterFunction instanceof Function) {
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return (Function) converterFunction;
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}
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return null;
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}
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Object callConverter(Function converterFunction)
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throws JavaScriptException
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{
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Function f = (Function) converterFunction;
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return f.call(Context.getContext(), f.getParentScope(),
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this, new Object[0]);
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}
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Object callConverter(String converterName)
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throws JavaScriptException
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{
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Function converter = getConverter(converterName);
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if (converter == null) {
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Object[] errArgs = { converterName, javaObject.getClass().getName() };
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throw Context.reportRuntimeError(
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Context.getMessage("msg.java.conversion.implicit_method",
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errArgs));
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}
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return callConverter(converter);
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}
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public Object getDefaultValue(Class hint) {
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if (hint == null || hint == ScriptRuntime.StringClass)
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return javaObject.toString();
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try {
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if (hint == ScriptRuntime.BooleanClass)
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return callConverter("booleanValue");
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if (hint == ScriptRuntime.NumberClass) {
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return callConverter("doubleValue");
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}
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// fall through to error message
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} catch (JavaScriptException jse) {
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// fall through to error message
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}
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throw Context.reportRuntimeError(
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Context.getMessage("msg.default.value", null));
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}
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/**
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* Determine whether we can/should convert between the given type and the
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* desired one. This should be superceded by a conversion-cost calculation
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* function, but for now I'll hide behind precedent.
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*/
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public static boolean canConvert(Object fromObj, Class to) {
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int weight = NativeJavaObject.getConversionWeight(fromObj, to);
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return (weight < CONVERSION_NONE);
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}
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static final int JSTYPE_UNDEFINED = 0; // undefined type
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static final int JSTYPE_NULL = 1; // null
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static final int JSTYPE_BOOLEAN = 2; // boolean
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static final int JSTYPE_NUMBER = 3; // number
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static final int JSTYPE_STRING = 4; // string
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static final int JSTYPE_JAVA_CLASS = 5; // JavaClass
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static final int JSTYPE_JAVA_OBJECT = 6; // JavaObject
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static final int JSTYPE_JAVA_ARRAY = 7; // JavaArray
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static final int JSTYPE_OBJECT = 8; // Scriptable
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public static final byte CONVERSION_TRIVIAL = 1;
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public static final byte CONVERSION_NONTRIVIAL = 0;
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public static final byte CONVERSION_NONE = 99;
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/**
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* Derive a ranking based on how "natural" the conversion is.
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* The special value CONVERSION_NONE means no conversion is possible,
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* and CONVERSION_NONTRIVIAL signals that more type conformance testing
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* is required.
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* Based on
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* <a href="http://www.mozilla.org/js/liveconnect/lc3_method_overloading.html">
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* "preferred method conversions" from Live Connect 3</a>
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*/
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public static int getConversionWeight(Object fromObj, Class to) {
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int fromCode = NativeJavaObject.getJSTypeCode(fromObj);
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int result = CONVERSION_NONE;
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switch (fromCode) {
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case JSTYPE_UNDEFINED:
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if (to == ScriptRuntime.StringClass ||
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to == ScriptRuntime.ObjectClass) {
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result = 1;
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}
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break;
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case JSTYPE_NULL:
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if (!to.isPrimitive()) {
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result = 1;
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}
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break;
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case JSTYPE_BOOLEAN:
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// "boolean" is #1
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if (to == Boolean.TYPE) {
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result = 1;
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}
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else if (to == ScriptRuntime.BooleanClass) {
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result = 2;
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}
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else if (to == ScriptRuntime.ObjectClass) {
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result = 3;
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}
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else if (to == ScriptRuntime.StringClass) {
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result = 4;
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}
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break;
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case JSTYPE_NUMBER:
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if (to.isPrimitive()) {
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if (to == Double.TYPE) {
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result = 1;
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}
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else if (to != Boolean.TYPE) {
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result = 1 + NativeJavaObject.getSizeRank(to);
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}
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}
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else {
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if (to == ScriptRuntime.StringClass) {
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// native numbers are #1-8
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result = 9;
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}
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else if (to == ScriptRuntime.ObjectClass) {
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result = 10;
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}
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else if (ScriptRuntime.NumberClass.isAssignableFrom(to)) {
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// "double" is #1
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result = 2;
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}
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}
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break;
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case JSTYPE_STRING:
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if (to == ScriptRuntime.StringClass) {
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result = 1;
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}
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else if (to == ScriptRuntime.ObjectClass) {
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result = 2;
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}
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else if (to.isPrimitive() && to != Boolean.TYPE) {
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if (to == Character.TYPE) {
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result = 3;
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}
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else {
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result = 4;
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}
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}
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break;
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case JSTYPE_JAVA_CLASS:
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if (to == ScriptRuntime.ClassClass) {
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result = 1;
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}
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else if (Context.useJSObject && jsObjectClass != null &&
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jsObjectClass.isAssignableFrom(to)) {
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result = 2;
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}
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else if (to == ScriptRuntime.ObjectClass) {
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result = 3;
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}
|
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else if (to == ScriptRuntime.StringClass) {
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result = 4;
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}
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break;
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case JSTYPE_JAVA_OBJECT:
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case JSTYPE_JAVA_ARRAY:
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if (to == ScriptRuntime.StringClass) {
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result = 2;
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}
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else if (to.isPrimitive() && to != Boolean.TYPE) {
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result =
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(fromCode == JSTYPE_JAVA_ARRAY) ?
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CONVERSION_NONTRIVIAL :
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2 + NativeJavaObject.getSizeRank(to);
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}
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else {
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Object javaObj = fromObj;
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if (javaObj instanceof NativeJavaObject) {
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javaObj = ((NativeJavaObject)javaObj).unwrap();
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}
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if (to.isInstance(javaObj)) {
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result = CONVERSION_NONTRIVIAL;
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}
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}
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break;
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case JSTYPE_OBJECT:
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// Other objects takes #1-#3 spots
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if (Context.useJSObject && jsObjectClass != null &&
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jsObjectClass.isAssignableFrom(to)) {
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result = 1;
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}
|
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else if (fromObj instanceof NativeArray && to.isArray()) {
|
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// This is a native array conversion to a java array
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// Array conversions are all equal, and preferable to object
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// and string conversion, per LC3.
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result = 1;
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}
|
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else if (to == ScriptRuntime.ObjectClass) {
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result = 2;
|
|
}
|
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else if (to == ScriptRuntime.StringClass) {
|
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result = 3;
|
|
}
|
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else if (to.isPrimitive() || to != Boolean.TYPE) {
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result = 3 + NativeJavaObject.getSizeRank(to);
|
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}
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break;
|
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}
|
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|
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return result;
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|
|
}
|
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|
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static int getSizeRank(Class aType) {
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if (aType == Double.TYPE) {
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return 1;
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}
|
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else if (aType == Float.TYPE) {
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return 2;
|
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}
|
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else if (aType == Long.TYPE) {
|
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return 3;
|
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}
|
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else if (aType == Integer.TYPE) {
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return 4;
|
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}
|
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else if (aType == Short.TYPE) {
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return 5;
|
|
}
|
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else if (aType == Character.TYPE) {
|
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return 6;
|
|
}
|
|
else if (aType == Byte.TYPE) {
|
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return 7;
|
|
}
|
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else if (aType == Boolean.TYPE) {
|
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return CONVERSION_NONE;
|
|
}
|
|
else {
|
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return 8;
|
|
}
|
|
}
|
|
|
|
static int getJSTypeCode(Object value) {
|
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if (value == null) {
|
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return JSTYPE_NULL;
|
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}
|
|
else if (value == Undefined.instance) {
|
|
return JSTYPE_UNDEFINED;
|
|
}
|
|
else if (value instanceof Scriptable) {
|
|
if (value instanceof NativeJavaClass) {
|
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return JSTYPE_JAVA_CLASS;
|
|
}
|
|
else if (value instanceof NativeJavaArray) {
|
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return JSTYPE_JAVA_ARRAY;
|
|
}
|
|
else if (value instanceof NativeJavaObject) {
|
|
return JSTYPE_JAVA_OBJECT;
|
|
}
|
|
else {
|
|
return JSTYPE_OBJECT;
|
|
}
|
|
}
|
|
else {
|
|
Class valueClass = value.getClass();
|
|
|
|
if (valueClass == ScriptRuntime.StringClass) {
|
|
return JSTYPE_STRING;
|
|
}
|
|
else if (valueClass == ScriptRuntime.BooleanClass) {
|
|
return JSTYPE_BOOLEAN;
|
|
}
|
|
else if (value instanceof Number) {
|
|
return JSTYPE_NUMBER;
|
|
}
|
|
else if (valueClass == ScriptRuntime.ClassClass) {
|
|
return JSTYPE_JAVA_CLASS;
|
|
}
|
|
else if (valueClass.isArray()) {
|
|
return JSTYPE_JAVA_ARRAY;
|
|
}
|
|
else {
|
|
return JSTYPE_JAVA_OBJECT;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Type-munging for field setting and method invocation.
|
|
* Conforms to LC3 specification
|
|
*/
|
|
public static Object coerceType(Class type, Object value) {
|
|
if (value != null && value.getClass() == type) {
|
|
return value;
|
|
}
|
|
|
|
switch (NativeJavaObject.getJSTypeCode(value)) {
|
|
|
|
case JSTYPE_NULL:
|
|
// raise error if type.isPrimitive()
|
|
if (type.isPrimitive()) {
|
|
reportConversionError(value, type);
|
|
}
|
|
return null;
|
|
|
|
case JSTYPE_UNDEFINED:
|
|
if (type == ScriptRuntime.StringClass ||
|
|
type == ScriptRuntime.ObjectClass) {
|
|
return "undefined";
|
|
}
|
|
else {
|
|
reportConversionError("undefined", type);
|
|
}
|
|
break;
|
|
|
|
case JSTYPE_BOOLEAN:
|
|
// Under LC3, only JS Booleans can be coerced into a Boolean value
|
|
if (type == Boolean.TYPE ||
|
|
type == ScriptRuntime.BooleanClass ||
|
|
type == ScriptRuntime.ObjectClass) {
|
|
return value;
|
|
}
|
|
else if (type == ScriptRuntime.StringClass) {
|
|
return value.toString();
|
|
}
|
|
else {
|
|
reportConversionError(value, type);
|
|
}
|
|
break;
|
|
|
|
case JSTYPE_NUMBER:
|
|
if (type == ScriptRuntime.StringClass) {
|
|
return ScriptRuntime.toString(value);
|
|
}
|
|
else if (type == ScriptRuntime.ObjectClass) {
|
|
return coerceToNumber(Double.TYPE, value);
|
|
}
|
|
else if ((type.isPrimitive() && type != Boolean.TYPE) ||
|
|
ScriptRuntime.NumberClass.isAssignableFrom(type)) {
|
|
return coerceToNumber(type, value);
|
|
}
|
|
else {
|
|
reportConversionError(value, type);
|
|
}
|
|
break;
|
|
|
|
case JSTYPE_STRING:
|
|
if (type == ScriptRuntime.StringClass ||
|
|
type == ScriptRuntime.ObjectClass) {
|
|
return value;
|
|
}
|
|
else if (type == Character.TYPE ||
|
|
type == ScriptRuntime.CharacterClass) {
|
|
// Special case for converting a single char string to a
|
|
// character
|
|
// Placed here because it applies *only* to JS strings,
|
|
// not other JS objects converted to strings
|
|
if (((String)value).length() == 1) {
|
|
return new Character(((String)value).charAt(0));
|
|
}
|
|
else {
|
|
return coerceToNumber(type, value);
|
|
}
|
|
}
|
|
else if ((type.isPrimitive() && type != Boolean.TYPE) ||
|
|
ScriptRuntime.NumberClass.isAssignableFrom(type)) {
|
|
return coerceToNumber(type, value);
|
|
}
|
|
else {
|
|
reportConversionError(value, type);
|
|
}
|
|
break;
|
|
|
|
case JSTYPE_JAVA_CLASS:
|
|
if (Context.useJSObject && jsObjectClass != null &&
|
|
(type == ScriptRuntime.ObjectClass ||
|
|
jsObjectClass.isAssignableFrom(type))) {
|
|
return coerceToJSObject(type, (Scriptable)value);
|
|
}
|
|
else {
|
|
if (value instanceof Wrapper) {
|
|
value = ((Wrapper)value).unwrap();
|
|
}
|
|
|
|
if (type == ScriptRuntime.ClassClass ||
|
|
type == ScriptRuntime.ObjectClass) {
|
|
return value;
|
|
}
|
|
else if (type == ScriptRuntime.StringClass) {
|
|
return value.toString();
|
|
}
|
|
else {
|
|
reportConversionError(value, type);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case JSTYPE_JAVA_OBJECT:
|
|
case JSTYPE_JAVA_ARRAY:
|
|
if (type.isPrimitive()) {
|
|
if (type == Boolean.TYPE) {
|
|
reportConversionError(value, type);
|
|
}
|
|
return coerceToNumber(type, value);
|
|
}
|
|
else {
|
|
if (value instanceof Wrapper) {
|
|
value = ((Wrapper)value).unwrap();
|
|
}
|
|
if (type == ScriptRuntime.StringClass) {
|
|
return value.toString();
|
|
}
|
|
else {
|
|
if (type.isInstance(value)) {
|
|
return value;
|
|
}
|
|
else {
|
|
reportConversionError(value, type);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case JSTYPE_OBJECT:
|
|
if (Context.useJSObject && jsObjectClass != null &&
|
|
(type == ScriptRuntime.ObjectClass ||
|
|
jsObjectClass.isAssignableFrom(type))) {
|
|
return coerceToJSObject(type, (Scriptable)value);
|
|
}
|
|
else if (type == ScriptRuntime.StringClass) {
|
|
return ScriptRuntime.toString(value);
|
|
}
|
|
else if (type.isPrimitive()) {
|
|
if (type == Boolean.TYPE) {
|
|
reportConversionError(value, type);
|
|
}
|
|
return coerceToNumber(type, value);
|
|
}
|
|
else if (type.isInstance(value)) {
|
|
return value;
|
|
}
|
|
else if (type.isArray() && value instanceof NativeArray) {
|
|
// Make a new java array, and coerce the JS array components
|
|
// to the target (component) type.
|
|
NativeArray array = (NativeArray) value;
|
|
long length = array.jsGet_length();
|
|
Class arrayType = type.getComponentType();
|
|
Object Result = Array.newInstance(arrayType, (int)length);
|
|
for (int i = 0 ; i < length ; ++i) {
|
|
try {
|
|
Array.set(Result, i, coerceType(arrayType,
|
|
array.get(i, array)));
|
|
}
|
|
catch (EvaluatorException ee) {
|
|
reportConversionError(value, type);
|
|
}
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
else {
|
|
reportConversionError(value, type);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
static Object coerceToJSObject(Class type, Scriptable value) {
|
|
// If JSObject compatibility is enabled, and the method wants it,
|
|
// wrap the Scriptable value in a JSObject.
|
|
|
|
if (ScriptRuntime.ScriptableClass.isAssignableFrom(type))
|
|
return value;
|
|
|
|
try {
|
|
Object ctorArgs[] = { value };
|
|
return jsObjectCtor.newInstance(ctorArgs);
|
|
} catch (InstantiationException instEx) {
|
|
throw new EvaluatorException("error generating JSObject wrapper for " +
|
|
value);
|
|
} catch (IllegalArgumentException argEx) {
|
|
throw new EvaluatorException("JSObject constructor doesn't want [Scriptable]!");
|
|
} catch (InvocationTargetException e) {
|
|
throw WrappedException.wrapException(e.getTargetException());
|
|
} catch (IllegalAccessException accessEx) {
|
|
throw new EvaluatorException("JSObject constructor is protected/private!");
|
|
}
|
|
}
|
|
|
|
static Object coerceToNumber(Class type, Object value) {
|
|
Class valueClass = value.getClass();
|
|
|
|
// Character
|
|
if (type == Character.TYPE || type == ScriptRuntime.CharacterClass) {
|
|
if (valueClass == ScriptRuntime.CharacterClass) {
|
|
return value;
|
|
}
|
|
return new Character((char)toInteger(value,
|
|
ScriptRuntime.CharacterClass,
|
|
(double)Character.MIN_VALUE,
|
|
(double)Character.MAX_VALUE));
|
|
}
|
|
|
|
// Double, Float
|
|
if (type == ScriptRuntime.ObjectClass ||
|
|
type == ScriptRuntime.DoubleClass || type == Double.TYPE) {
|
|
return valueClass == ScriptRuntime.DoubleClass
|
|
? value
|
|
: new Double(toDouble(value));
|
|
}
|
|
|
|
if (type == ScriptRuntime.FloatClass || type == Float.TYPE) {
|
|
if (valueClass == ScriptRuntime.FloatClass) {
|
|
return value;
|
|
}
|
|
else {
|
|
double number = toDouble(value);
|
|
if (Double.isInfinite(number) || Double.isNaN(number)
|
|
|| number == 0.0) {
|
|
return new Float((float)number);
|
|
}
|
|
else {
|
|
double absNumber = Math.abs(number);
|
|
if (absNumber < (double)Float.MIN_VALUE) {
|
|
return new Float((number > 0.0) ? +0.0 : -0.0);
|
|
}
|
|
else if (absNumber > (double)Float.MAX_VALUE) {
|
|
return new Float((number > 0.0) ?
|
|
Float.POSITIVE_INFINITY :
|
|
Float.NEGATIVE_INFINITY);
|
|
}
|
|
else {
|
|
return new Float((float)number);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Integer, Long, Short, Byte
|
|
if (type == ScriptRuntime.IntegerClass || type == Integer.TYPE) {
|
|
if (valueClass == ScriptRuntime.IntegerClass) {
|
|
return value;
|
|
}
|
|
else {
|
|
return new Integer((int)toInteger(value,
|
|
ScriptRuntime.IntegerClass,
|
|
(double)Integer.MIN_VALUE,
|
|
(double)Integer.MAX_VALUE));
|
|
}
|
|
}
|
|
|
|
if (type == ScriptRuntime.LongClass || type == Long.TYPE) {
|
|
if (valueClass == ScriptRuntime.LongClass) {
|
|
return value;
|
|
}
|
|
else {
|
|
/* Long values cannot be expressed exactly in doubles.
|
|
* We thus use the largest and smallest double value that
|
|
* has a value expressible as a long value. We build these
|
|
* numerical values from their hexidecimal representations
|
|
* to avoid any problems caused by attempting to parse a
|
|
* decimal representation.
|
|
*/
|
|
final double max = Double.longBitsToDouble(0x43dfffffffffffffL);
|
|
final double min = Double.longBitsToDouble(0xc3e0000000000000L);
|
|
return new Long(toInteger(value,
|
|
ScriptRuntime.LongClass,
|
|
min,
|
|
max));
|
|
}
|
|
}
|
|
|
|
if (type == ScriptRuntime.ShortClass || type == Short.TYPE) {
|
|
if (valueClass == ScriptRuntime.ShortClass) {
|
|
return value;
|
|
}
|
|
else {
|
|
return new Short((short)toInteger(value,
|
|
ScriptRuntime.ShortClass,
|
|
(double)Short.MIN_VALUE,
|
|
(double)Short.MAX_VALUE));
|
|
}
|
|
}
|
|
|
|
if (type == ScriptRuntime.ByteClass || type == Byte.TYPE) {
|
|
if (valueClass == ScriptRuntime.ByteClass) {
|
|
return value;
|
|
}
|
|
else {
|
|
return new Byte((byte)toInteger(value,
|
|
ScriptRuntime.ByteClass,
|
|
(double)Byte.MIN_VALUE,
|
|
(double)Byte.MAX_VALUE));
|
|
}
|
|
}
|
|
|
|
return new Double(toDouble(value));
|
|
}
|
|
|
|
|
|
static double toDouble(Object value) {
|
|
if (value instanceof Number) {
|
|
return ((Number)value).doubleValue();
|
|
}
|
|
else if (value instanceof String) {
|
|
return ScriptRuntime.toNumber((String)value);
|
|
}
|
|
else if (value instanceof Scriptable) {
|
|
if (value instanceof Wrapper) {
|
|
// XXX: optimize tail-recursion?
|
|
return toDouble(((Wrapper)value).unwrap());
|
|
}
|
|
else {
|
|
return ScriptRuntime.toNumber(value);
|
|
}
|
|
}
|
|
else {
|
|
Method meth;
|
|
try {
|
|
meth = value.getClass().getMethod("doubleValue", null);
|
|
}
|
|
catch (NoSuchMethodException e) {
|
|
meth = null;
|
|
}
|
|
catch (SecurityException e) {
|
|
meth = null;
|
|
}
|
|
if (meth != null) {
|
|
try {
|
|
return ((Number)meth.invoke(value, null)).doubleValue();
|
|
}
|
|
catch (IllegalAccessException e) {
|
|
// XXX: ignore, or error message?
|
|
reportConversionError(value, Double.TYPE);
|
|
}
|
|
catch (InvocationTargetException e) {
|
|
// XXX: ignore, or error message?
|
|
reportConversionError(value, Double.TYPE);
|
|
}
|
|
}
|
|
return ScriptRuntime.toNumber(value.toString());
|
|
}
|
|
}
|
|
|
|
static long toInteger(Object value, Class type, double min, double max) {
|
|
double d = toDouble(value);
|
|
|
|
if (Double.isInfinite(d) || Double.isNaN(d)) {
|
|
// Convert to string first, for more readable message
|
|
reportConversionError(ScriptRuntime.toString(value), type);
|
|
}
|
|
|
|
if (d > 0.0) {
|
|
d = Math.floor(d);
|
|
}
|
|
else {
|
|
d = Math.ceil(d);
|
|
}
|
|
|
|
if (d < min || d > max) {
|
|
// Convert to string first, for more readable message
|
|
reportConversionError(ScriptRuntime.toString(value), type);
|
|
}
|
|
return (long)d;
|
|
}
|
|
|
|
static void reportConversionError(Object value, Class type) {
|
|
Object[] args = { value.toString(),
|
|
NativeJavaMethod.javaSignature(type)
|
|
};
|
|
throw Context.reportRuntimeError(
|
|
Context.getMessage("msg.conversion.not.allowed", args));
|
|
}
|
|
|
|
public static void initJSObject() {
|
|
if (!Context.useJSObject)
|
|
return;
|
|
// if netscape.javascript.JSObject is in the CLASSPATH, enable JSObject
|
|
// compatability wrappers
|
|
jsObjectClass = null;
|
|
try {
|
|
jsObjectClass = Class.forName("netscape.javascript.JSObject");
|
|
Class ctorParms[] = { ScriptRuntime.ScriptableClass };
|
|
jsObjectCtor = jsObjectClass.getConstructor(ctorParms);
|
|
jsObjectGetScriptable = jsObjectClass.getMethod("getScriptable",
|
|
new Class[0]);
|
|
} catch (ClassNotFoundException classEx) {
|
|
// jsObjectClass already null
|
|
} catch (NoSuchMethodException methEx) {
|
|
// jsObjectClass already null
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The prototype of this object.
|
|
*/
|
|
protected Scriptable prototype;
|
|
|
|
/**
|
|
* The parent scope of this object.
|
|
*/
|
|
protected Scriptable parent;
|
|
|
|
protected Object javaObject;
|
|
protected JavaMembers members;
|
|
private Hashtable fieldAndMethods;
|
|
static Class jsObjectClass;
|
|
static Constructor jsObjectCtor;
|
|
static Method jsObjectGetScriptable;
|
|
}
|
|
|