1 /*
2 * Copyright (c) 2002-2018, Mairie de Paris
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice
10 * and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice
13 * and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * 3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 * License 1.0
33 */
34 package fr.paris.lutece.plugins.directory.modules.multiview.web.record.util;
35
36 import java.io.Serializable;
37 import java.util.Comparator;
38
39 import org.apache.commons.lang3.math.NumberUtils;
40
41 /**
42 * Comparator for objects which implements the IRecordListPosition interface
43 */
44 public class RecordListPositionComparator implements Comparator<IRecordListPosition>, Serializable
45 {
46 /**
47 * Serial UID
48 */
49 private static final long serialVersionUID = -3710184421474776162L;
50
51 /**
52 * {@inheritDoc}
53 */
54 @Override
55 public int compare( IRecordListPosition recordListPositionOne, IRecordListPosition recordListPositionTwo )
56 {
57 int nCompareResult = NumberUtils.INTEGER_ZERO;
58
59 if ( recordListPositionOne == null )
60 {
61 if ( recordListPositionTwo != null )
62 {
63 nCompareResult = NumberUtils.INTEGER_MINUS_ONE;
64 }
65 }
66 else
67 {
68 if ( recordListPositionTwo == null )
69 {
70 nCompareResult = NumberUtils.INTEGER_ONE;
71 }
72 else
73 {
74 Integer nPositionRecordListElementOne = recordListPositionOne.getPosition( );
75 Integer nPositionRecordListElementTwo = recordListPositionTwo.getPosition( );
76
77 nCompareResult = nPositionRecordListElementOne.compareTo( nPositionRecordListElementTwo );
78 }
79 }
80
81 return nCompareResult;
82 }
83 }