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RunScript3.java
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59 lines (52 loc) · 1.97 KB
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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
import org.mozilla.javascript.Context;
import org.mozilla.javascript.Function;
import org.mozilla.javascript.Scriptable;
/**
* 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[])
{
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 collected. 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();
}
}
}