rhino

I have a Java 7 project which makes a lot of use of Javascript for scripting various features. Until now I was using Rhino as script engine. I would now like to move to Java 8, which also means that I will replace Rhino by Nashorn. How compatible is Nashorn to Rhino? Can I use it as a drop-in replacement, or can I expect that some of my scripts will not work anymore and will need to be ported to the new engine? Are there any commonly-used features of Rhino which are not supported by Nashorn? One problem is that Nashorn can no longer by default import whole Java packages into the global scope

I am confused about JavaScript engines right now. I know that V8 was a big deal because it compiled JavaScript to native code. Then I started reading about Mozilla SpiderMonkey , which from what I understand is written in C and can compile JavaScript. So how is this different from V8 and if this is true, why does Firefox not do this? Finally, does Rhino literally compile the JavaScript to Java byte code so you would get all the speed advantages of Java? If not, why do people not run V8 when writing scripts on their desktops? There are various approaches to JavaScript execution, even when doing

how to write unit tests to internal classes ??? You write tests which specify the behaviour of the top-level class' external interface. Whether that class uses internal classes to implement that behaviour or not, is an implementation detail of the class, and the tests don't need to know anything about it. If the internal class cannot be adequately tested through the top-level class' interface, then it's usually best to move the internal class out and test it directly as a new top-level class. Wanting to test internal classes is a code smell that the internal class might be significant enough

I compiled following JavaScript file, "test.js", into the "test.class" : var test = (function () { var that = {}; that.addNumbers = function (a, b) { return a+b; }; return that; }()); I would like to call the compiled JavaScript function, "test.addNumbers(1,2)", in the simple Java program "run.java" as follows : public class run { public static void main(String[] args) throws Exception { Context cx = Context.enter(); try { Scriptable scope = cx.initStandardObjects(); // HOW TO CALL THE METHOD, Test.addNumbers(1,2)? Please help me! } finally { Context.exit(); } } } I tried many ways, but failed

I am trying to call a java script function from java code. Here is my Java code public static void main(String[] args) throws FileNotFoundException { try { /** * To call a anonymous function from java script file */ ScriptEngine engine = new ScriptEngineManager() .getEngineByName("javascript"); FileReader fr = new FileReader("src/js/MySpec.js"); engine.eval(fr); } catch (ScriptException scrEx) { scrEx.printStackTrace(); } } Here is my java script file: (function() { alert("Hello World !!!"); })(); But when I run main method of driver class it is giving me error as below: Exception in thread

I'm using Mozilla Rhino 1.7r2 (not the JDK version), and I want to call a JS function from Java. My JS function is like this: function abc(x,y) { return x+y } How do I do this? Edit: (The JS function is in a separate file) String script = "function abc(x,y) {return x+y;}"; Context context = Context.enter(); try { ScriptableObject scope = context.initStandardObjects(); Scriptable that = context.newObject(scope); Function fct = context.compileFunction(scope, script, "script", 1, null); Object result = fct.call( context, scope, that, new Object[] {2, 3}); System.out.println(Context.jsToJava

I have the following: ScriptEngineManager mgr = new ScriptEngineManager(); ScriptEngine jsEngine = mgr.getEngineByName("JavaScript"); jsEngine.eval("function getArray() {return [1,2,3,4,5];};"); Object result = jsEngine.eval("getArray();"); How can i convert the result object which is of type sun.org.mozilla.javascript.internal.NativeArray to a corresponding java array? Can somone show me a working code sample where this is done? It should work for String and Integer arrays. Plus, it would be great to know where to look for other data type conversions between the rhino engine and java. Btw, i

I'm trying to use Mozilla Rhino in my Java application for Android to evaluate some JavaScript. I am using Eclipse + ADT plugin. First I tried simply downloading the Rhino .jar file from Mozilla's website and adding it to the project as a library in Eclipse. Eclipse recognised it fine and compiled the application. However, when running it I get an exception when calling Context.evaluateReader() (see below for stack trace). Then I tried adding the Rhino source code as a separate Android project in Eclipse, marking it as a library and referencing it in my project, which was enough to get Eclipse

I want do compile all *.less scripts in a specific folder and it subdirs with less-rhino-1.1.3.js . There is an example on github for doing this for a specific file, which works perfect. But I want to do the same for a complete folder. I tried a lot, here is my last try. It doesn't work, propertyregex seems not to be standard ANT, I don't want to use such things. I am not even sure if this code would work. <project name="test" default="main" basedir="../../"> <property name="css.dir" location="public/css"/> <property name="tool.less" location="bin/less/less-rhino-1.1.3.js"/> <property name=