src/javax/persistence/metamodel/MapAttribute.java

/*******************************************************************************
 * Copyright (c) 1998, 2009 Oracle. 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.
 * 
 * The API for this class and its comments are derived from the JPA 2.0 specification 
 * which is developed under the Java Community Process (JSR 317) and is copyright 
 * Sun Microsystems, Inc. 
 *
 * Contributors:
 *     dclarke - Java Persistence 2.0 - Proposed Final Draft (March 13, 2009)
 *               Specification and licensing terms available from
 *               http://jcp.org/en/jsr/detail?id=317
 *     gyorke  - Post PFD updates
 *
 * EARLY ACCESS - PUBLIC DRAFT
 * This is an implementation of an early-draft specification developed under the 
 * Java Community Process (JCP) and is made available for testing and evaluation 
 * purposes only. The code is not compatible with any specification of the JCP.
 ******************************************************************************/
package javax.persistence.metamodel;

/**
 * Instances of the type MapAttribute represent persistent Map-valued
 * attributes.
 *
 * @param <X> The type the represented Map belongs to
 * @param <K> The type of the key of the represented Map
 * @param <V> The type of the value of the represented Map
 */
public interface MapAttribute<X, K, V> 
	extends PluralAttribute<X, java.util.Map<K, V>, V> {

    /**
     * Return the Java type of the map key.
     * @return Java key type
     */
    Class<K> getKeyJavaType();

    /**
     * Return the type representing the key type of the map.
     * @return type representing key type
     */
    Type<K> getKeyType();
}