Nashorn java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/JSObject

Question

I am migrating my Eclipse RCP to use JDK 8 and I heavily use the JS ScriptEngine . Now that Nashorn is introduced I had to add the following line to get the importClass and importPackage functions to work:

load("nashorn:mozilla_compat.js");

After doing so, I got java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/JSObject .

I am using Nashorn inside an Eclipse RCP. The problem occurs when I call a Java function from the Javascript and try to use the parameter sent. The parameter I want to send is a Javascript function that I would like to execute call on later in the code.

I have the following code:

TestNashorn.java

package com.test.nashorn;

import java.io.FileNotFoundException;
import java.io.FileReader;

import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import javax.script.Invocable;

import jdk.nashorn.api.scripting.JSObject;

public class TestNashorn {

    public static void main(String[] args) {
        ScriptEngine engine = (new ScriptEngineManager()).getEngineByName("js");
        try {
            engine.eval(new FileReader("C:/Users/user/workspace_nashorn/TestNashorn/src/com/test/nashorn/test.js"));
            Object o = ((Invocable)engine).invokeFunction("generate");
        } catch (ScriptException | FileNotFoundException | NoSuchMethodException e) {
            e.printStackTrace();
        }
    }

    public static int test(JSObject o1) {
        System.out.println(o1.getClass().toString());
        JSObject som = ((JSObject)o1);
        return 1;
    }
}

test.js

load("nashorn:mozilla_compat.js");
importClass(com.test.nashorn.TestNashorn);

function generate()
{
    function asd(variablex) { print('Hello, ' + variablex); }
    var result = TestNashorn.test(asd);
}

The problem occurs in line JSObject som = ((JSObject)o1); , although I can successfully import jdk.nashorn.api.scripting.JSObject; .

The exception message exactly says:

jdk.nashorn.api.scripting.JSObject cannot be found by com.test.nashorn_1.0.0.qualifier

Answer 1

So.. I got to fix my issue and was able to use JSObject in my code. What I have done was the following:

• Added -Dorg.osgi.framework.bundle.parent=ext to myproduct.product file

This added it to the .ini file in my product build which revealed the classes found in Nashorn APIs.