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/*
 * Copyright (c) 1998, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.internal.oxm.documentpreservation;

import java.util.WeakHashMap;

import org.eclipse.persistence.oxm.documentpreservation.AppendNewElementsOrderingPolicy;

/**
 * INTERNAL:
 * 

Purpose:Provide an implementation of DocumentPreservation Policy that accesses the * session cache to store Objects and their associated nodes. *

Responsibilities:

    *
  • Add new objects and their associated nodes into the Session cache, wrapping them in a weak * reference. *
  • Lookup the node for a given Object * * @author mmacivor * @since TopLink 11g */ public class DescriptorLevelDocumentPreservationPolicy extends AbstractDocumentPreservationPolicy { public DescriptorLevelDocumentPreservationPolicy() { super(); nodesToObjects = new WeakHashMap(); objectsToNodes = new WeakHashMap(); this.setNodeOrderingPolicy(new AppendNewElementsOrderingPolicy()); } }




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