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Hibernate definition of the Java Persistence 2.0 (JSR 317) API.

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// $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();
}