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The Java Persistence API (JPA) : a standard interface-based Java model abstraction of persistence, developed by the JCP.

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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.util.Map;

/**
 * Represents an attribute node of an entity graph.
 * @param  The type of the attribute.
 * @since JPA 2.1
 */
public interface AttributeNode
{
    /**
     * Return the name of the attribute corresponding to the attribute node.
     * @return name of the attribute
     */
    public String getAttributeName();

    /**
     * Return the Map of subgraphs associated with this attribute node.
     * @return Map of subgraphs associated with this attribute node or empty Map if none have been defined
     */
    public Map getSubgraphs();

    /**
     * Return the Map of subgraphs associated with this attribute node's map key.
     * @return Map of subgraphs associated with this attribute node's map key or empty Map if none have been
     * defined
     */
    public Map getKeySubgraphs();
}