eclipse - GAE+Objectify - Parameterized type com.googlecode.objectify.Ref not supported

Question

I am using Google App engine1.9.3, Eclipse, Objectify5.03. My Class is as follows:

import com.googlecode.objectify.Ref;
import com.googlecode.objectify.annotation.Entity;
import com.googlecode.objectify.annotation.Id;
import com.googlecode.objectify.annotation.Load;

@Entity
public class User {

@Id private Long userId;
private String userName;
@Load private Ref<UserDetails> userDetails;
@Load private Ref<UserPassword> userPassword;

//getters & setters 

}

When I try creating the google endpoint for this class thru Eclipse, I get the following error: java.lang.IllegalArgumentException: Parameterized type com.googlecode.objectify.Ref not supported

This is my first attempt at Objectify.

Any ideas what I am doing wrong. From whatever I have read so far GAE endpoints and Objectify should work, correct?

Answer 1

Waitting for answers