Do I have to use this Context factory?

Hello!

I'm playing around with a small project at home.
I got one ejb-server running in a WlS 10.3.
And a client in a standalone app.

The client is suppose to connect to the server like this with RMI/JNDI:

            Hashtable h = new Hashtable();
            h.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
            h.put(Context.PROVIDER_URL, "t3://192.168.1.35:8003");
            InitialContext initialContext = new InitialContext(h);

            Object object = initialContext.lookup("my_domain/ejb/client/ORMManagerEJBHome");


            ORMManagerEJBHome ormManagerEJBHome = (ORMManagerEJBHome)PortableRemoteObject.narrow(object, ORMManagerEJBHome.class);
            ORMManagerEJBObject ormManagerEJBObject = ormManagerEJBHome.create();

But when I run this I got a lot of NoClassDefFoundError, so I had been adding alot of jars to my maven repo and I'm not done yet.

So my question now is if I must use the class "weblogic.jndi.WLInitialContextFactory" just because I use weblogic?
Or is there an generic class I can use hopefully provided from sun?

Best regards
Fredrik