Hibernate version:
3.1.2
EntityManager beta 6
Annotation beta 8

Name and version of the database you are using:
MS SQL

I have Operation Entity with field of type algorithm declared as follows:
@OneToOne(targetEntity = Algorithm.class, cascade = CascadeType.ALL,
fetch = FetchType.LAZY)
@org.hibernate.annotations.Cascade(
org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
@JoinColumn(name = "oper_id")
public IAlgorithm getAlgorithm() {
return algorithm;
}


what is the right way to initialize algorithm in the entityManager other than the one I've loaded operation with.

The poing is that when i use query like:
Query q = em.createQuery(
"select op.algorithm from Operation op where op.id = ?1");
q.setParameter(1, operation.getId());
operation.setAlgorithm((IAlgorithm) q.getSingleResult());

the SECOND time i save operation none of algorithm children are saved using em.merge() command :(

Good luck and thank you!

You've never run this code


it shold raie a ClassCastException

Thank you, emmanuel for your attention, i see that you are working much on helping people at this forum.

Actually that code runs without exceptions. Before posting my question here i was working on this issue for something like 3 days. So could you please point out where exactly, do you think, that should be ClastCastException, and why?

By the way, we are experiencing kind of black magic here.
The domain model is like:
Operation 1-1 Algorithm 1-n Procedure 1-1 ProcedureText 1-n ProcedureTextBlock... and so on.

I would like to have Operation-Algorithm and Procedure-ProcedureText to be LAZY. Because of problems described in first post to this topic, I've turned LAZY to EAGER for both assocciations mentioned. TestCases went fine. THEN i've turned Operation-Algorithm back to LAZY and TestCases went fine also, BUT in our application we started to get LazyInitException at the algorithm.getProcedures() witch have allways been an EAGER assocciation! :)

You can find my domain model here :http://www.bekarsoft.com/mikler/domain.rar

what ever...
i would like you to answer to question, witch i can not find in docs, FAQs or anywhere else. The question is
WHAT IS THE RIGHT WAY TO INITIALIZE LAZY PROPERTY, WITCH WAS LOADED IN ANOTHER ENTITYMANAGER?

problem seems to be found

oh I misread your query. I didn't see the select op.algorithm