Table per class with id in superclass and diff sequence gen

RaduTanasa · **Posted:** Fri Sep 07, 2007 5:46 am

Hello. I have a rather annoying problem. I have the following classes: AbstractEntity, which contains the id, and n classes which extend it. The mapping of the hierarchy is table per class. Now, I want the id to be generated automatically, but independent for each table.

Example:

Code:

dao.insertEntityA(entityA1);
dao.insertEntityB(entityB1);
dao.insertEntityB(entityA2);
dao.insertEntityA(entityB2);

Now, I expect that the ids of the elements in the DB have the values: 1, 2 for both tables. I tried all sorts of annotations :) but still, the best thing I got (that actually worked) was a generic sequence, which is not very helpful.

If anyone knows how to solve this, please let me know. Thank you very much. By the way, I can only use annotations, so an XML mapping will not work for me. I'm using JPA (Hibernate impl).

emmanuel · **Posted:** Tue Sep 11, 2007 3:52 pm

How is mapped AbstractEntity?

RaduTanasa · **Posted:** Wed Sep 12, 2007 2:09 am

Hello. I managed to solve this using @MappedSuperclass. Thanks. :)