Hi everybody,

I'm searching a mean (other thant creating DTO) to be able to detach an object from its hibernate session.

In fact, I retrieve an object list each of them containing objects sets and I'd like to force the initialization of those sets.

The object list is destinated to be serialized. When deserialized, the session is not available anymore.

I don't want to force the lazy to false in the hibernate mapping files beacause of the use of the service by others layers which may work with lazy loading.

I have already tried to use the following methods :



But this give anything...

any help will be greatly appreciated !

Thanks to all,

Sebastien

Both of those methods are fine. Of course you must do this within the context of the Session/Transaction that loaded the original entity. Do you see SQL being generated when you initialize the collection?

Thanks for your reply.

Yes, I'm well in the session that loaded the original entity. I don't see any sql generated when calling the initialize method...

Let's see the code, please. Note that if you load foo and want to initialize its bars collection, you should call Hibernate.initialize(foo.getBars()).

-Chris

Ok I have see my problem...

You are right Chris, it was my problem... I've to mention explicitely the collection I want to initialize.

But in my case it is very boring to do. Beacause my retrieved object contains set and the elements of this set contains also set,... So I have to itterate over each of those sets to force initialization....

I think the easier for me will be to create DTO finally.

Thanks all for your help.


Sébastien

Consider using an HQL query with "join fetch" to tweak your fetch plan for each specific use case. Java Persistence with Hibernate talks a lot about this and is a very good read for this topic.

Yes you are right !

Thanks again