Why is this JPA 2.0 mapping giving me an error in Eclipse/JBoss Tools?

Question

I have the following situation:
_{(source: kawoolutions.com)}

JPA 2.0 mappings (It might probably suffice to consider only the Zip and ZipId class

Answer 1

I have not tested your code, but it looks pretty much related to the use of the @PrimareKeyJoinColumn annotation.

The JPA 2.0 specification in section 11.1.40 states:

The PrimaryKeyJoinColumn annotation is used to join the primary table of an entity subclass in the JOINED mapping strategy to the primary table of its superclass; it is used within a SecondaryTable annotation to join a secondary table to a primary table; and it may be used in a OneToOne mapping in which the primary key of the referencing entity is used as a foreign key to the referenced entity[108].

The example in the spec looks like your case.

@Entity
@Table(name="CUST")
@Inheritance(strategy=JOINED)
@DiscriminatorValue("CUST")
public class Customer { ... }

@Entity
@Table(name="VCUST")
@DiscriminatorValue("VCUST")
@PrimaryKeyJoinColumn(name="CUST_ID")
public class ValuedCustomer extends Customer { ... }

I hope that helps!