Hello.

I faced with some trouble in primary key generation.
What I want to do is to make IDs to be a power of two: 2, (2*2), (2*2*2), ... (2*2*n-times*2)
I was failed to find a reference in the documentation. Is there any way to specify my own generator for the object ID? Can anyone, please, point me to an appropriate part of the documentation. Also it would be be great to have some example. Thanks.
I'm using hibernate + mySql.

You'll need to create a class that implements the org.hibernate.id.IdentifierGenerator interface and specify that class in the mapping files. See http://docs.jboss.org/hibernate/stable/ ... aration-id for more information.

Thank you much for your reply. It was not so hard after your help. I got the appropriate result