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/*
 * The contents of this file are subject to the terms 
 * of the Common Development and Distribution License 
 * (the License).  You may not use this file except in
 * compliance with the License.
 * 
 * You can obtain a copy of the license at 
 * https://glassfish.dev.java.net/public/CDDLv1.0.html or
 * glassfish/bootstrap/legal/CDDLv1.0.txt.
 * See the License for the specific language governing 
 * permissions and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL 
 * Header Notice in each file and include the License file 
 * at glassfish/bootstrap/legal/CDDLv1.0.txt.  
 * If applicable, add the following below the CDDL Header, 
 * with the fields enclosed by brackets [] replaced by
 * you own identifying information: 
 * "Portions Copyrighted [year] [name of copyright owner]"
 * 
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 */
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.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Defines mapping for the composite foreign keys. This annotation 
 * groups {@link JoinColumn} annotations for the same relationship.
 *
 *  When the JoinColumns annotation is used, 
 * both the {@link JoinColumn#name name} and the {@link 
 * JoinColumn#referencedColumnName referencedColumnName} elements 
 * must be specified in each such {@link JoinColumn} annotation.
 *
 * 
 *
 *    Example:
 *    @ManyToOne
 *    @JoinColumns({
 *        @JoinColumn(name="ADDR_ID", referencedColumnName="ID"),
 *        @JoinColumn(name="ADDR_ZIP", referencedColumnName="ZIP")
 *    })
 *    public Address getAddress() { return address; }
 * 
 *
 * @since Java Persistence 1.0
 */
@Target({TYPE, METHOD, FIELD}) 
@Retention(RUNTIME)

public @interface JoinColumns {
    JoinColumn[] value();
}