I'm trying to implement Hibernate's table-per-concrete class strategy using EJB3.0's TABLE_PER_CLASS inheritance and the latest CVS source code.

This used to work in preview 4, but with the latest source code I don't seem to have the ability to overwrite the @Table attribute on the subclass, and it appears to automagically create a "type" attribute that shouldn't exist.

My base class looks like:

@Entity(access = AccessType.FIELD)
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public abstract class BaseEntity3<EntityPKType extends PK3> implements java.io.Serializable, Comparable
{
@Id(generate = GeneratorType.NONE)
@Column(name="ID")
protected long id;

@Version
@Column(name="VERSION")
protected long version;
...
}

My concrete subclass is:

@Entity(access = AccessType.FIELD)
@Table(name = "Groups")
public class Group3 extends BaseEntity3<GroupPK3>
{
@Column(name="NAME", nullable=false, length=50)
protected String name;

@Column(name="DESCRIPTION", length=50)
protected String description;

@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name="PREFERENCE_PARENT_ID")
protected Group3 preferenceParent;
...
}

When I do a find on Group3, the SQL looks like:
select group3x0_.ID as ID, ... from BaseEntity3 group3x0_ where group3x0_.TYPE='com.portblue.model.admin.group.Group3' ...

I've tried putting a @Inheritance tag on the subclass as well as on the superclass, and I get the Hibernate error: org.hibernate.AnnotationException: TABLE_PER_CLASS only allows hierarchy leaf mapping

I also tried putting a union-subclass hibernate mapping in a Group3.hbm.xml file, but then I got a complaint about "duplicate mappings".

Am I missing something? Thanks...

- Mark