Hello,

Im building a client/server application using RMI and Hibernate in the server side. To save, delete and retrieve persistent objects I built a class on the server called ServerAcess with methods saveObject, deleteObject, retrieveAllObjects etc that can be accessed by clients via RMI. The objects are passed from client to server and vice-versa via Serialization.

Example:

public Set retrieveAllObjects(Class persistenteClass) would retrieve all persistent objects of the desired persistent class.

The idea is to completely separate the clients from the persistence mechanism. I mean, clients cannot use any library from Hibernate, only the server can do that.

While I was using it with objects with no one-to-many associations it was working fine. However, now I have a persistent object with a set of other persistent objects and im stucked in a problem: The Set class used by Hibernate is not the same Set class used in Java API, it is a own implementation. So,

No way. Hibernate use it's own implementation of collection (with respect) to the abstract Set, List and Map however) in order to know if a collection has been updated, and to allow lazy loading of collection.

You mean I willl have to install all Hibernate libraries in the clients to have it working?? Or there is another alternative?

Thank you,

Deep copy ?

Isn't the Hibernate collection class simply serialized to the client? What do you need the Hibernate library on the client for?

Hibernate collections are serialized to the client, so I have to have its libraries in the clients so that they can recognize it.

I'm having the same problem. While it's easy to make a deep copy, I think it's ugly solution and unnecessary because the collection already exists.

Is there any way to get the original collection out of the hibernate wrappers?

Thanks in advance and keep up the great work! :)