[Hibernate-issues] [Hibernate-JIRA] Created: (EJB-199) Polymorphic association to a MappedSuperclass throws exception

[Markus J. (JIRA) <no...@at...>]

Polymorphic association to a MappedSuperclass throws exception
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         Key: EJB-199
         URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-199
     Project: Hibernate Entity Manager
        Type: Bug

  Components: EntityManager  
    Versions: 3.2.0.cr1    
 Environment: Annotations CR1, EntityManager CR1, and Hibernate 3.2 CR2
    Reporter: Markus Junginger


I think it should be possible to have polymorphic association to a class annotated as a MappedSuperclass. However, this combination throws an exception.

The class Xyz is a super class for a couple of entity classes:
@MappedSuperclass
public abstract class Xyz{...}

The following association to Xyz does not work (see exception below)
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumns({...})
private Xyz test;

If it matters, each entity (the sub classes of Xyz) is annotated with
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS).


Here's the execption:

javax.persistence.PersistenceException: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on play.abc.test references an unknown entity: play.Xyz
at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:196)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:114)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:37)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:27)
...

Caused by: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on play.abc.test references an unknown entity: play.Xyz
at org.hibernate.cfg.FkSecondPass.doSecondPass(FkSecondPass.java:40)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:261)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1034)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:868)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:163)
at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:641)
at org.hibernate.ejb.Ejb3Configuration.createFactory(Ejb3Configuration.java:134)
at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:188)
... 20 more

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