| This annotation groups
PrimaryKeyJoinColumn annotations.
It is used to map composite foreign keys.
Example 1: ValuedCustomer subclass
@Entity
@Table(name="VCUST")
@DiscriminatorValue("VCUST")
@PrimaryKeyJoinColumns({
@PrimaryKeyJoinColumn(name="CUST_ID",
referencedColumnName="ID"),
@PrimaryKeyJoinColumn(name="CUST_TYPE",
referencedColumnName="TYPE")
})
public class ValuedCustomer extends Customer { ... }
since:
Java Persistence 1.0 |