javax.persistence.MapKeyJoinColumns Maven / Gradle / Ivy
// $Id: MapKeyJoinColumns.java 17752 2009-10-15 01:19:21Z [email protected] $
// EJB3 Specification Copyright 2004-2009 Sun Microsystems, Inc.
package javax.persistence;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* 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.
*
* @see MapKeyJoinColumn
*
* @since Java Persistence 2.0
*/
@Target( { METHOD, FIELD })
@Retention(RUNTIME)
public @interface MapKeyJoinColumns {
/**
* (Required) The map key join columns that are used to map to the entity
* that is the map key.
*/
MapKeyJoinColumn[] value();
}