[jboss-user] [EJB 3.0] - JPQL polymorphic query

I have a class hierarchy of 3 Entities, one of which is the superclass for the others: @Entity @Table(name="PER") @Inheritance(strategy=InheritanceType.JOINED) @SequenceGenerator(name="SeqIdPer", sequenceName="SEQIDPER") public abstract class Person implements Serializable { ... } @Entity @Table(name="PHYPER") @PrimaryKeyJoinColumn(name="IDPHYPER") public class PhysicalPerson extends Person { .. } @Entity @Table(name="MORALPER") @PrimaryKeyJoinColumn(name="IDMORALPER") public class MoralPerson extends Person { ... } When I execute the following JPQL: String strPerQuery = "SELECT OBJECT(per) FROM Person per where per.idPer = ?"; query=em.createQuery(strPerQuery); query.setParameter(1, idPerson); Person resPer = (Person)query.getSingleResult(); I get an object of the class Person, but I cannot downcast it to any of the subclasses. For example, even when I know that the person I sought is an instance of PhysicalPerson, the following cast throws a ClassCastException: PhysicalPerson phyPer = (PhysicalPerson )resPer; Even more, when I print the runtime class of the object using resPer.getClass(), I get the following class: mypackage.Person_$$_javassist_16 Shouldn't the query be polymorphic, and return an object of the subclass? I'm using JBoss 5 beta 4. Thanks in advance. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4139068#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...