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Clean-room definition of JPA APIs intended for use in developing Hibernate JPA implementation. See README.md for details

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/*
 * Copyright (c) 2008, 2009, 2011 Oracle, Inc. 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.
 */
package javax.persistence;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

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(); /** * (Optional) The foreign key constraint specification for the join columns. This is used only if table generation * is in effect. Default is provider defined. * * @return The foreign key specification */ ForeignKey foreignKey() default @ForeignKey(); }





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