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From "Jeffrey Blatttman (JIRA)" <>
Subject [jira] Updated: (OPENJPA-174) error when find()'ing an abstract class
Date Mon, 19 Mar 2007 17:39:32 GMT


Jeffrey Blatttman updated OPENJPA-174:


this is the simple A, B class test case the works. again, maven2 netbeans projects ... requires
derby on localhost:1527 running.

> error when find()'ing an abstract class
> ---------------------------------------
>                 Key: OPENJPA-174
>                 URL:
>             Project: OpenJPA
>          Issue Type: Bug
>    Affects Versions: 0.9.6
>         Environment: Java SE 5
> Derby 
>            Reporter: Jeffrey Blatttman
>         Attachments:,
> class B extends A
> A is abstract
> B is concrete
> i have persisted an instance of B. now i try:
> A a = em.find(A.class, anId);
> openjpa fails with:
> ... Cannot create new application identity instance for abstract   class "class A"
> if i change the find to:
> A a = em.find(B.class, anId);
> openjpa works okay.
> note that i have two test cases. one is my real model, and one is the simple A and B
class example above. my real model fails, where the simple A, B class example works as expected.
so, it's is either a side affect of some other issue, or there is something wrong in my model
and the error message is misleading or lacking information.

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