org.eclipse.persistence.internal.oxm.documentpreservation.DescriptorLevelDocumentPreservationPolicy Maven / Gradle / Ivy
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/*
* Copyright (c) 1998, 2023 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 org.eclipse.persistence.oxm.documentpreservation.AppendNewElementsOrderingPolicy;
import java.util.WeakHashMap;
/**
* 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());
}
}