Using Hibernate 3.X

I would like Hibernate to use a factory (per class) to create objects when retrieving from the DB instead of invoking the default constructor, so that I can inject (IOC style) some facilities in those objects that are specific to the each class (e.g. resource managers).

I have tried with Events and interceptors, but those are application wide and therefore would require a big dispatcher that knows which factory to use for each class.

I have not seen any obvious configurations in the doc, and I was unable to find anything similar searching through the forums, wiki and Jira.

Any pointers would be greatly appreciated.

Miguel

custom persister

Maybe this is the wrong way to do it, but I have my factories making the hibernate calls instead of hibernate calling the factory.

I wrote a factory for each class which all implemented a common interface. Then I wrote a builder for the factories, so my code looks like:

Factory f = FactoryBuilder.build(new CustomObject());

The factory builder builds the correct factory based on the object passed to it. Then in the factory I have simple methods like getObject, getObjects, etc. Each of these methods builds the appropriate hql for the object you are trying to get based upon what it was constructed with... so it should be easy to do your IOC stuff along with that.

I did it this way since it is easy to unplug hibernate and plug in jdbc or toplink and that was a requirement for development. Not sure if this is what you were looking for, but that's how I used custom factories with Hibernate.

Thanks a lot for the answers I think I'll try the persisters, as we do not see a need to migrate out of hibernate and I would like to leverage Criteria queries and related facilities.

To go the route for custom persisters, how does hibernate decide what persister to use? What are the rules to follow to know what persister to extend and how to attach it to hibernate?

Sorry for the ignorance, but this is the first time I get under the hood of hibernate and just discovering the big V8 under it.

Thanks again

Miguel