Comments on: Reusing JPA models using embedded entities and composition

By: Adrian Co

Adrian Co — Wed, 07 May 2008 19:11:40 +0000

@Alex: I’m not sure if OpenJPA has this feature. Hibernate does have filters [http://www.hibernate.org/hib_docs/reference/en/html/filters.html]. I don’t know if the SQLEmbed class can do the trick [http://openjpa.apache.org/docs/latest/javadoc/org/apache/openjpa/jdbc/kernel/exps/SQLEmbed.html]. I’m actually interested in a similar feature.

By: Adrian Co

Adrian Co — Wed, 07 May 2008 18:53:16 +0000

@Jason: What persistence provider does Jboss/Seam use? Hibernate? I haven’t actually tested the code in Hibernate. I’ll try it when I get the time.

By: alex

alex — Wed, 07 May 2008 12:03:41 +0000

Hi, pretty interesting article, but I was wondering if you could give me a hint on some problem related to this article… I was wondering if there is a way of defining a preLoad method or a where clause implied, or a method of extending the @ManyToOne annotation and modify it in order to achieve the result which is to have an extra query over all the joins and all the selects executed by JPA. Thanks in advance.

By: Jason Christian

Jason Christian — Fri, 25 Apr 2008 19:41:05 +0000

Tried this example in my code to replace inheritence scheme to do basically the same thing. Wouldn’t run in Jboss/Seam - got an TypeNotPresentExceptionProxy error on the EntityListeners annotation (at least it goes away when I comment that code out, but then the rest still had some problems I was too lazy to figure out).