javax.persistence

Annotation Type MapKeyJoinColumns

@Target(value={ANNOTATION_TYPE,METHOD,FIELD})
 @Retention(value=RUNTIME)
public @interface MapKeyJoinColumns

Supports composite map keys that reference entities.

The MapKeyJoinColumns annotation groups MapKeyJoinColumn annotations. When the MapKeyJoinColumns annotation is used, both the name and the referencedColumnName elements must be specified in each of the grouped MapKeyJoinColumn annotations.

Since:

Java Persistence 2.0

See Also:

MapKeyJoinColumn

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
MapKeyJoinColumn[]	value (Required) The map key join columns that are used to map to the entity that is the map key.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
ForeignKey	foreignKey (Optional) The foreign key constraint specification for the join columns.

Element Detail

value

public abstract MapKeyJoinColumn[] value

(Required) The map key join columns that are used to map to the entity that is the map key.

Returns:

The join cols

foreignKey

public abstract ForeignKey foreignKey

(Optional) The foreign key constraint specification for the join columns. This is used only if table generation is in effect. Default is provider defined.

Returns:

The foreign key specification

Default:

@javax.persistence.ForeignKey