I have two class that have one-to-one relationship.
I found whever I load an object of first class from Database,
it always do anto-join. I really want lazy loading of the object of the
second class, how to do that?
Speficying proxy on the second class is not preventing auto-join.

Thanks

http://www.hibernate.org/162.html should help you

So my understanding is:
in case of one-to-one mapping and constrained is false.
I may be more efficient to load the object of the second class mannually?

Jim

I have this problem as well is there a way to get the lazy loading on a one to one where I can't use optional = false using annotations.

I have also just tried doing instrumentation and adding the

@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY )
@PrimaryKeyJoinColumn
@org.hibernate.annotations.LazyToOne( org.hibernate.annotations.LazyToOneOption.NO_PROXY )

annotations. The entity is still not lazy loaded.

That always seemed to work in a mappings file. I wonder why the annotations equivalent doesn't do lazy loading?

Thanks for the response, this is really bad, I mean with lazy loading my queries go from 5 minutes to 8 seconds.

The problem is the OneToOne is not optional. If I could somehow trap the EntityNotFoundException and return null this would be fine as well but there is a JBoss transaction interceptor that is throwing it from the accessor.

Ah I had another versionf of the cglib.jar file in my path. Removing and doing instrumentation again resolved it phew.