/*
* Copyright (c) 2008, 2009 Sun Microsystems. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Linda DeMichiel - Java Persistence 2.0 - Version 2.0 (October 1, 2009)
* Specification available from http://jcp.org/en/jsr/detail?id=317
*/
// $Id: MapKeyJoinColumns.java 20957 2011-06-13 09:58:51Z stliu $
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.
* <p> The <code>MapKeyJoinColumns</code> annotation groups
* <code>MapKeyJoinColumn</code> annotations. When the
* <code>MapKeyJoinColumns</code> annotation is used, both the
* <code>name</code> and the <code>referencedColumnName</code>
* elements must be specified in each of the grouped
* <code>MapKeyJoinColumn</code> 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();
}