101 lines
3.7 KiB
Java
101 lines
3.7 KiB
Java
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Rhino code, released
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* May 6, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1997-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* the GNU General Public License Version 2 or later (the "GPL"), in which
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* case the provisions of the GPL are applicable instead of those above. If
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* you wish to allow use of your version of this file only under the terms of
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* the GPL and not to allow others to use your version of this file under the
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* MPL, indicate your decision by deleting the provisions above and replacing
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* them with the notice and other provisions required by the GPL. If you do
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* not delete the provisions above, a recipient may use your version of this
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* file under either the MPL or the GPL.
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*
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* ***** END LICENSE BLOCK ***** */
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import org.mozilla.javascript.*;
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/**
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* Example of controlling the JavaScript execution engine.
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*
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* We evaluate a script and then manipulate the result.
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*
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*/
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public class Control {
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/**
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* Main entry point.
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*
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* Process arguments as would a normal Java program. Also
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* create a new Context and associate it with the current thread.
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* Then set up the execution environment and begin to
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* execute scripts.
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*/
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public static void main(String[] args)
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{
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Context cx = Context.enter();
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try {
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// Set version to JavaScript1.2 so that we get object-literal style
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// printing instead of "[object Object]"
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cx.setLanguageVersion(Context.VERSION_1_2);
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// Initialize the standard objects (Object, Function, etc.)
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// This must be done before scripts can be executed.
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Scriptable scope = cx.initStandardObjects();
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// Now we can evaluate a script. Let's create a new object
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// using the object literal notation.
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Object result = cx.evaluateString(scope, "obj = {a:1, b:['x','y']}",
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"MySource", 1, null);
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Scriptable obj = (Scriptable) scope.get("obj", scope);
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// Should print "obj == result" (Since the result of an assignment
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// expression is the value that was assigned)
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System.out.println("obj " + (obj == result ? "==" : "!=") +
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" result");
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// Should print "obj.a == 1"
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System.out.println("obj.a == " + obj.get("a", obj));
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Scriptable b = (Scriptable) obj.get("b", obj);
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// Should print "obj.b[0] == x"
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System.out.println("obj.b[0] == " + b.get(0, b));
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// Should print "obj.b[1] == y"
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System.out.println("obj.b[1] == " + b.get(1, b));
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// Should print {a:1, b:["x", "y"]}
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Function fn = (Function) ScriptableObject.getProperty(obj, "toString");
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System.out.println(fn.call(cx, scope, obj, new Object[0]));
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} finally {
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Context.exit();
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}
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}
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}
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