pjs/js/rhino/examples/RunScript.java

/* -*- 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 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
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 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
 * 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 Netscape are
 * Copyright (C) 1999 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
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 * under the terms of the GPL and not to allow others to use your
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 */

import org.mozilla.javascript.*;

/**
 * RunScript: simplest example of controlling execution of Rhino.
 * 
 * Collects its arguments from the command line, executes the 
 * script, and prints the result.
 * 
 * @author Norris Boyd
 */
public class RunScript {
    public static void main(String args[]) 
        throws JavaScriptException 
    {
        // Creates and enters a Context. The Context stores information
        // about the execution environment of a script.
        Context cx = Context.enter();
        
        // Initialize the standard objects (Object, Function, etc.)
        // This must be done before scripts can be executed. Returns
        // a scope object that we use in later calls.
        Scriptable scope = cx.initStandardObjects(null);
        
        // Collect the arguments into a single string.
        String s = "";
        for (int i=0; i < args.length; i++)
            s += args[i];
        
        // Now evaluate the string we've colected.
        Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);
        
        // Convert the result to a string and print it.
        System.err.println(cx.toString(result));
        
        // Exit from the context.
        Context.exit();
    }
}