Subj : Rhino: Adding an existing java object to a scope.
To   : netscape.public.mozilla.jseng
From : Keith Tingle
Date : Tue Nov 09 2004 02:44 pm

Is there a way to set an object's prototype without using
Context::newObject() to create the object and assign the prototype all at
once? 

I have objects that are artifacts of a large system of objects that I would
like to add late (long after they have been created on the heap) to the
scope of the scripts.

If I set bRhinoCreates = true in the following java code it results in;

>> TypeError: undefined is not a function.<< 

import org.mozilla.javascript.*;

public class Elmo extends ScriptableObject {
    public String getClassName() {
        return "Elmo";
    }

    public void jsFunction_tickleMe() {
        System.out.println("Haha!");
    }

    public static void main(String[] args) {
        try {
            Context context = Context.enter();
            Scriptable scope = context.initStandardObjects(null);

            Elmo elmo = null;
            boolean bRhinoCreates = true;

            // Add Elmo as a class type
            ScriptableObject.defineClass(scope, Elmo.class);

            if (bRhinoCreates) {
                // Works, object created in Rhino
                elmo = (Elmo) context.newObject(scope, "Elmo");
            } else {
                // Doesn't work when I create the object myself,
		    // am I missing a step???
                elmo = new Elmo();
            }

            // Add object to scope
            scope.put("elmo", scope, elmo);
            context.evaluateString(scope, "elmo.tickleMe();", "<test>", 0,
null);

            Context.exit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

.