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#4139068
Reply to the post :
http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4139068
_______________________________________________
jboss-user mailing list
[email protected]
https://lists.jboss.org/mailman/listinfo/jboss-user
