javax.persistence

Annotation Type PrimaryKeyJoinColumns

@Target(value={TYPE,METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface PrimaryKeyJoinColumns

Groups PrimaryKeyJoinColumn annotations. It is used to map composite foreign keys.

    Example: 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

See Also:

ForeignKey

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
PrimaryKeyJoinColumn[]	value One or more PrimaryKeyJoinColumn annotations.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
ForeignKey	foreignKey (Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect.

Element Detail

value

public abstract PrimaryKeyJoinColumn[] value

One or more PrimaryKeyJoinColumn annotations.

foreignKey

public abstract ForeignKey foreignKey

(Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect. If both this element and the foreignKey element of any of the PrimaryKeyJoinColumn elements are specified, the behavior is undefined. If no foreign key annotation element is specified in either location, the persistence provider's default foreign key strategy will apply.

Since:

Java Persistence 2.1

Default:

@javax.persistence.ForeignKey(javax.persistence.ConstraintMode.PROVIDER_DEFAULT)