How to get object state (saved or unsaved)?

edumrf · **Joined:** Tue Jun 16, 2009 4:11 pm **Posts:** 8

Given an object instance and a session, is there any way to find out whether this object is saved or not ***(WITHOUT having to execute a select), can't check if id is null cause the key generation is done before the save command.

*In Ruby's ActiveRecord this would be "object.new_record?".

Any help would really be appreciated;

Cameron McKenzie · **Posted:** Wed Aug 19, 2009 9:55 pm

What about querying the id and seeing if it is null?

Adam from PL · **Posted:** Fri Aug 21, 2009 12:26 pm

@Cameron McKenzie
Hmmm... But how to check this when @Id has a primitive type, like int or long?

Regards,
Adam Wozniak

Cameron McKenzie · **Posted:** Sat Aug 22, 2009 3:24 pm

Darn, you got me. :(

What's the scenario or purpose for needing this? Is it anything other than the obvious? Maybe if I knew the context of the problem you're trying to solve, it might spark an idea?

sahar.rostami · **Joined:** Sat Feb 21, 2009 3:18 am **Posts:** 2

Quote:

@Cameron McKenzie
Hmmm... But how to check this when @Id has a primitive type, like int or long?

Regards,
Adam Wozniak

Hi,
in case of primitive types , you can compare it with "0",if Id equals to zero or not.

edumrf · **Joined:** Tue Jun 16, 2009 4:11 pm **Posts:** 8

Hi again, my Id gets set before saving the object, due to a diferent key generation policy, I already solved this using AspectJ, but if by any chances this can be solved using only Hibernate, would be much better. Querying the database before saving is not an option since it may be a very time consuming operation.

Thanks for all the replies.