1 /**
2 * This file Copyright (c) 2015 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.jcr.comparator;
35
36 import java.util.Comparator;
37
38 import javax.jcr.Node;
39 import javax.jcr.RepositoryException;
40
41 /**
42 * Compares the string representations of two node properties identified by the property name.
43 *
44 * <p>Not having the expected property will be considered as a lesser value. When both nodes do not have the property
45 * they will be considered equal.</p>
46 */
47 public class PropertyStringComparator implements Comparator<Node> {
48
49 private final String propertyName;
50
51 public PropertyStringComparator(String propertyName) {
52 this.propertyName = propertyName;
53 }
54
55 @Override
56 public int compare(Node node1, Node node2) {
57 try {
58 String stringValueProperty1 = null;
59 if (node1.hasProperty(this.propertyName)) {
60 stringValueProperty1 = node1.getProperty(this.propertyName).getString();
61 }
62
63 String stringValueProperty2 = null;
64 if (node2.hasProperty(this.propertyName)) {
65 stringValueProperty2 = node2.getProperty(this.propertyName).getString();
66 }
67
68 if (stringValueProperty1 == stringValueProperty2) {
69 return 0;
70 }
71 if (stringValueProperty1 == null) {
72 return -1;
73 }
74 if (stringValueProperty2 == null) {
75 return 1;
76 }
77 return stringValueProperty1.compareTo(stringValueProperty2);
78 } catch (RepositoryException e) {
79 throw new RuntimeException("Error getting property from jcr node.", e);
80 }
81 }
82
83 }