javax.persistence

public @Interface MapKeyJoinColumns

Annotations

@Target:METHOD, FIELD
@Retention:RUNTIME

Imports

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, ForeignKey

Method Summary

Modifier and Type	Method and Description
public ForeignKey	foreignKey() (Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect.
public MapKeyJoinColumn[]	value() (Required) The map key join columns that are used to map to the entity that is the map key.

Inherited from java.lang.annotation.Annotation:: annotationType equals hashCode toString

Method Detail

foreignKey back to summary

foreignKey	back to summary
public 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 `MapKeyJoinColumn` 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

public 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 MapKeyJoinColumn 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

value	back to summary
public MapKeyJoinColumn[] value() (Required) The map key join columns that are used to map to the entity that is the map key.