I read somewhere that foreign identity generation is not yet implemented. Is this the case?

For example

 @Entity
 public class Response
 {
 @Id(generate = GeneratorType.IDENTITY)
 int getId()
 { .. }
 @OneToMany(cascade=CascadeType.ALL,fetch=FetchType.EAGER,mappedBy="response")
 Collection<Answer> getAnswers()
 { .. }
 }

 @Entity
 public class Answer
 {
 @EmbeddedId({
 @AttributeOverride(name="response"),
 @AttributeOverride(name="question")
 })
 int getId()
 { .. }

 String getAnswer()
 { .. }
 }

Also, the AnswerPK class would just store 2 int's for the id's. When I try to do this (essentially):

 Response r = new Response();
 r.getAnswers().add(new Answer(..));
 em.persist(r);

I get a constraint error in relation to the foreign key (Answer.id.response).

Any help would be appreciated. Thanks.