Note: This ORM/SQL annotation is silently ignored by ObjectDB

javax.persistence.MapKeyJoinColumns - JPA annotation

javax.persistence
Annotation MapKeyJoinColumns

Target:
Fields (including property get methods)
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:
JPA 2.0
See Also:
MapKeyJoinColumn
(Required) The map key join columns that are used to map to the entity that is the map key.
(Required) The map key join columns that are used to map to the entity that is the map key.
Since:
JPA 2.0