getRole() returns null in Interceptor.onCollectionRecreate()

Gropi · **Joined:** Wed Aug 03, 2005 11:04 am **Posts:** 10

Hibernate version:
3.1.2 (brand new ;-) )

Problem:

I am using the "new" onCollectionRecreate(Object collection, Serializable key) and onCollectionUpdate(Object collection, Serializable key) methods in the org.hibernate.Interceptor to implement an audit trail in the interceptor.

For that reason I cast the given collection to a PersistentCollection if possible and use the getRole()-method to determine which collection has been altered.

Code:

public void onCollectionUpdate(Object collection, Serializable key) throws CallbackException {
   if (collection instanceof PersistentCollection) {
      PersistentCollection pc = (PersistentCollection) collection;
      System.out.println("Update on "+pc.getRole()+":"+ key.toString());
   }
}

This approach works fine for me in the update scenario, the output is as expected. But for the recreate case where I just created a new Entity, saved [session.save(entity)] and then flushed it I just get a "null" from pc.getRole().

Is this the intended behaviour? Am I missing something?
I tried to wade through the Hibernate code and see where that role is set, but these paths back to the HbmBinder are very tricky :-(.

Any thoughts anyone?

Alberthoven · **Joined:** Tue Feb 17, 2009 5:13 am **Posts:** 59

Hi all.

I'm in the same situation. I'm intercepting collections creation (and updates) and to manage it correctly, for each collection intercepted, I need to know the following data:
i) The type of collection elements
ii) The owner type
iii) The name of the owners' field which maps the collection

I am able to know the first two, but I can't to know the last one, and I need it!

Anybody knows something about?
Thanks in advance. Best regards.

wild_oscar · **Joined:** Wed May 23, 2007 1:07 pm **Posts:** 28

I have the same question, which is the same as in

http://opensource.atlassian.com/project ... e/HHH-3129

So, onCollectionRecreate is there any way to know where the collection comes from (ie, owner + property name)?
How can one compare its items with the items currently in the collection?