Mapping Joined-Subclass with Discriminator

jakennedy · **Joined:** Wed Jun 22, 2005 6:38 pm **Posts:** 7

Hibernate version: 2.1.8

I have a Parent table that I would like to subclass using joined-subclasses, however, the ID on this table is not unique (it's a view combining disparate tables). I would like to preserve uniquity by using an OBJECT_TYPE indicator (maybe a composite-id?). Is there a way to do this such that I can make the OBJECT_TYPE a discriminator?

I know that discriminators aren't typically used for joined-subclasses but I was hoping there might be a way to do this for my situation.

Thanks,
Jon

stewart.cambridge · **Joined:** Sat Nov 19, 2005 2:46 pm **Posts:** 69

a <joined-subclass> needs a <key>, which according to the DTD can take many <column> tags, so you would do this:

Code:

<joined-subclass name="abc" table="abc">
  <key>
    <column name="pk1"/>
    <column name="pk2"/>
  </key>
</joined-subclass>