Hibernate version: 3.0.5

I would like to be able to "intercept" the hydration of objects that are loaded from the database so that I can do some extra things to them before they are made available to the application. Is there any kind of existing hook that would allow this, or could someone point me to the class or classes that load the persistent objects so that I can maybe figure it out myself. I'm most interested in the code that loads and sets the object Id.

Thanks,
David

You know that you can implement some stuff just in the setter for the object id? Hibernate will per default access properties via accessor methods so you could stuff some logic in there.

Take a look at the org.hibernate.Interceptor interface:

http://www.hibernate.org/hib_docs/v3/ap ... eptor.html

Once implemented, you can register this interceptor at the global-configuration or per-session level.

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Josh

Yes, I am aware of the Interceptor interface, but it doesn't really satisfy my needs. Adding code to the setId() method doesn't really help, either.

I'm am attempting to use the Id in a little different manner for transient objects, but I need to know if the object is transient or persistent. In all cases they will be disconnected. So, what I'm looking for is a way to have Hibernate set a flag for me that lets me know that the object is persistent and not transient.

Thanks,
David

There's an interface in the .classic package that your entities may implement. It includes a method called onLoad().. that may help you.

Additionally, there are new event interfaces you can use. They're unfortunately not implemented as observer patterns (where you could just add yourself to the list)... but you can override the default implementation and hook yourself in. I believe the class to look at is:

org.hibernate.event.def.DefaultLoadEventListener

Phill

Sorry.. forgot to tell you what the interface in classic is called.. it's called Lifecycle.

Excellent! I thought I remembered there being an interface that would do what I wanted, and it looks like this will do the trick.

Thanks!