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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) 1997-1999 Netscape Communications Corporation. All Rights
* Reserved.
*/
import org.mozilla.javascript.*;
/**
* Example of controlling the JavaScript execution engine.
*
* We evaluate a script and then manipulate the result.
*
*/
public class Control {
/**
* Main entry point.
*
* Process arguments as would a normal Java program. Also
* create a new Context and associate it with the current thread.
* Then set up the execution environment and begin to
* execute scripts.
*/
public static void main(String[] args) {
Context cx = Context.enter();
// Set version to JavaScript1.2 so that we get object-literal style
// printing instead of "[object Object]"
cx.setLanguageVersion(Context.VERSION_1_2);
// Initialize the standard objects (Object, Function, etc.)
// This must be done before scripts can be executed.
Scriptable scope = cx.initStandardObjects(null);
// Now we can evaluate a script. Let's create a new object
// using the object literal notation.
Object result = null;
try {
result = cx.evaluateString(scope, "obj = {a:1, b:['x','y']}",
"MySource", 1, null);
}
catch (JavaScriptException jse) {
// ignore
}
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 " + (f.getObject() == result ? "==" : "!=") +
" result");
// Should print "f.a == 1"
System.out.println("f.a == " + f.getProperty("a"));
FlattenedObject b = (FlattenedObject) f.getProperty("b");
// Should print "f.b[0] == x"
System.out.println("f.b[0] == " + b.getProperty(new Integer(0)));
// 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"]}
System.out.println(f.callMethod("toString", new Object[0]));
} catch (PropertyException e) {
// ignore
} catch (NotAFunctionException e) {
// ignore
} catch (JavaScriptException e) {
// ignore
}
cx.exit();
}
}