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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 or later (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
* MPL, indicate your decision by deleting the provisions above and replacing
* 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 MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
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();
try {
// 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();
// Now we can evaluate a script. Let's create a new object
// using the object literal notation.
Object result = cx.evaluateString(scope, "obj = {a:1, b:['x','y']}",
"MySource", 1, null);
Scriptable obj = (Scriptable) scope.get("obj", scope);
// Should print "obj == result" (Since the result of an assignment
// expression is the value that was assigned)
System.out.println("obj " + (obj == result ? "==" : "!=") +
" result");
// Should print "obj.a == 1"
System.out.println("obj.a == " + obj.get("a", obj));
Scriptable b = (Scriptable) obj.get("b", obj);
// Should print "obj.b[0] == x"
System.out.println("obj.b[0] == " + b.get(0, b));
// Should print "obj.b[1] == y"
System.out.println("obj.b[1] == " + b.get(1, b));
// 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]));
} finally {
Context.exit();
}
}
}
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