1 /** 2 * This file Copyright (c) 2017-2018 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.imaging.parameters; 35 36 import info.magnolia.jcr.RuntimeRepositoryException; 37 import info.magnolia.jcr.wrapper.DelegateNodeWrapper; 38 39 import javax.jcr.Node; 40 import javax.jcr.RepositoryException; 41 42 /** 43 * A {@link DelegateNodeWrapper} which simply defines equals() and hashCode() methods 44 * based on the node's identifier. 45 * Identifier is cached, so that equals() and hashCode() will work even if the node's JCR session was terminated. 46 */ 47 public class SimpleEqualityNodeWrapper extends DelegateNodeWrapper { 48 49 private final String identifier; 50 51 public SimpleEqualityNodeWrapper(Node node) { 52 super(node); 53 try { 54 this.identifier = node.getIdentifier(); 55 } catch (RepositoryException e) { 56 throw new RuntimeRepositoryException(e); 57 } 58 } 59 60 @Override 61 public String getIdentifier() { 62 return identifier; 63 } 64 65 @Override 66 public boolean equals(Object o) { 67 return isSame((Node) o); 68 } 69 70 private boolean isSame(Node other) { 71 try { 72 return getIdentifier().equals(other.getIdentifier()); 73 } catch (RepositoryException e) { 74 throw new RuntimeRepositoryException(e); 75 } 76 } 77 78 @Override 79 public int hashCode() { 80 return (31 * getIdentifier().hashCode()); 81 } 82 }