When does hibernate use unsaved-value=0 for ID. If the id generation method is sequence generator and ID is greater than zero, does hibernate generate the sequence number on calling Save() method?


Thanks

As far as I know the unsaved-value is only used by the Session.saveOrUpdate() method to determine if if should delegate to Session.save() or Session.update().

Thanks nordborg for your reply.

My issue is, mapping has sequence generator for the identifier. There is one scenario where, entity already has the identifier assigned and do not want hibernate regenerate the identifier on save(). But, hibernate overrides my identifier. How can I handle this scenario?

I don't think any of the built-in Hibernate generators can do it. You may have to implement your own identifier generator.

I think the key here is use saveOrUpdate() method. This method will assign a "key" if not found for the object and do a save. If a key is already assigned it will update that entity.