gecko-dev/js/rhino/examples/RunScript3.java

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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
* the License at http://www.mozilla.org/NPL/
*
* 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 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.
* 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 NPL, indicate your decision by
* deleting the provisions above and replace 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 NPL or the GPL.
*/
import org.mozilla.javascript.*;
/**
* RunScript3: Example of using JavaScript objects
*
* Collects its arguments from the command line, executes the
* script, and then ...
*
* @author Norris Boyd
*/
public class RunScript3 {
public static void main(String args[])
throws JavaScriptException
{
Context cx = Context.enter();
try {
Scriptable scope = cx.initStandardObjects();
// 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. We'll ignore the result.
cx.evaluateString(scope, s, "<cmd>", 1, null);
// Print the value of variable "x"
Object x = scope.get("x", scope);
if (x == Scriptable.NOT_FOUND) {
System.out.println("x is not defined.");
} else {
System.out.println("x = " + Context.toString(x));
}
// Call function "f('my arg')" and print its result.
Object fObj = scope.get("f", scope);
if (!(fObj instanceof Function)) {
System.out.println("f is undefined or not a function.");
} else {
Object functionArgs[] = { "my arg" };
Function f = (Function)fObj;
Object result = f.call(cx, scope, scope, functionArgs);
String report = "f('my args') = " + Context.toString(result);
System.out.println(report);
}
} finally {
Context.exit();
}
}
}