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95 lines
3.1 KiB
Java
95 lines
3.1 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1997-1999 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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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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Context cx = Context.enter();
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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(null);
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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 = null;
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try {
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result = cx.evaluateString(scope, "obj = {a:1, b:['x','y']}",
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"MySource", 1, null);
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}
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catch (JavaScriptException jse) {
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// ignore
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}
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FlattenedObject global = new FlattenedObject(scope);
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FlattenedObject f = (FlattenedObject) global.getProperty("obj");
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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 " + (f.getObject() == result ? "==" : "!=") +
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" result");
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// Should print "f.a == 1"
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System.out.println("f.a == " + f.getProperty("a"));
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FlattenedObject b = (FlattenedObject) f.getProperty("b");
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// Should print "f.b[0] == x"
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System.out.println("f.b[0] == " + b.getProperty(new Integer(0)));
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// Should print "f.b[1] == y"
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System.out.println("f.b[1] == " + b.getProperty(new Integer(1)));
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try {
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// Should print {a:1, b:["x", "y"]}
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System.out.println(f.callMethod("toString", new Object[0]));
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} catch (PropertyException e) {
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// ignore
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} catch (NotAFunctionException e) {
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// ignore
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} catch (JavaScriptException e) {
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// ignore
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}
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cx.exit();
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}
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}
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