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 }