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Date: Thu, 07 May 2009 09:37:21 -0700
From: Craig L Russell <Craig.Russell@Sun.COM>
Subject: Re: TABLE_PER_CLASS does not work as described in JSR-200 (JPA-1.0)
In-reply-to: <1241706607858-2828426.post@n2.nabble.com>
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Hi,

OpenJPA allows mixing inheritance types in the hierarchy.

Can you try annotating each class with the @Inheritance annotation?

The inheritance strategy for the abstract class should be subclass to  
avoid having a table for the abstract class.

Craig

On May 7, 2009, at 7:30 AM, Leonardo NOLETO wrote:

>
> Hi,
>
> I have a big problem with TABLE_PER_CLASS mapping...I want map each  
> concrete
> classes in my class hierarchy to a separate table (in accordance with
> JSR-200 page 39 - Table per Concrete Class Strategy)
>
> When I use OpenJPA as provider, I have the following behavior :
>
> @Entity
> @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
> abstract class RootClass { // persistent properties}
>
> @Entity
> @Table(name="BAR_TABLE")
> class Bar extends RootClass {...}
>
> @Entity
> abstract AbstractFoo extends RootClass { // extra attributes }
>
> @Entity
> @Table(name="FOO1_TABLE")
> class Foo1 extends AbstractFoo {...}
>
> @Entity
> @Table(name="FOO2_TABLE")
> class Foo2 extends AbstractFoo {...}
>
> The image below helps to visualize my problem:
>
> http://n2.nabble.com/file/n2828426/tpc_issue_openjpa2.png
>
> If I use Hibernate as provider this works fine.
>
> Does anyone know why?
>
> I use openjpa-1.2.0.
>
> -- 
> View this message in context: http://n2.nabble.com/TABLE_PER_CLASS-does-not-work-as-described-in-JSR-200-%28JPA-1.0%29-tp2828426p2828426.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>

Craig L Russell
Architect, Sun Java Enterprise System http://db.apache.org/jdo
408 276-5638 mailto:Craig.Russell@sun.com
P.S. A good JDO? O, Gasp!


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