Hello list,

I am running into an exception and don't know, what it tells me. But first, two words about what I am doing:
I have an entity that I need to map. The entity contains an embedded object, which is derived from a base class. In code:



and



and



The situation, as given above, works! I can map the values in VeryBasicObject to columns and all is fine. But now: Out of various reasons I have the requirement to use an XML mapping (orm.xml) for the VeryBasicObject class.

Should be no problem, I'd think. Just remove the @MappedSuperclass annotation and add <mapped-superclass name="..."/> to the orm.xml.

But when I try that I get this exception:
javax.persistence.PersistenceException: java.lang.ClassCastException: $Proxy3
at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:217)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:114)

...
Caused by: java.lang.ClassCastException: $Proxy3
at org.hibernate.reflection.java.EJB3OverridenAnnotationReader.getMappedSuperclass(EJB3OverridenAnnotationReader.java:1688)
at org.hibernate.reflection.java.EJB3OverridenAnnotationReader.initAnnotations(EJB3OverridenAnnotationReader.java:285)

The exception comes when the EntityManagerFactory is created. I have stripped the code down to a test class and three small pojos and can reproduce the exception. I don't know if I can attach the eclipse project zip here somewhere, but it doesn't look that way. So, if you think it would help to have the reproducing eclipse project, drop me a note and I will send the thing to you by email, it is only 9kB. (The classpath of the project is left empty, I guess you'll know what you have to add to it for hibernate to work :-)).

I am using Hibernate 3.2.0.cr2, EntityManager 3.2.0.cr1 and Annotations 3.2.0.cr1.

Best wishes, Daniel

I'm having the exact same issue, when I attempt to override a mappedSuperclass using a <mapped-superclass /> element in the orm.xml.

Even if I don't override anything and just tell it to use the annotations. eg.

<mapped-superclass class="..." metadata-complete="false">

</mapped-superclass>

Change metadata-complete to true makes no difference, neither does defining anything between the tags.

Looking at the source it appears to be creating a proxy with overridden annotations. I'm going to attempt to debug it when I get time. Definately appears to be a bug in my opinion.

It appears work fine if I override the mapped superclass through the entity tag.

I am using Hibernate 3.2.0.cr2, EntityManager 3.2.0.cr1 and Annotations 3.2.0.cr1.

Same issue here. I created an issue in JIRA:

http://opensource.atlassian.com/project ... se/EJB-204