001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.util.comparator;
016    
017    import com.liferay.portal.kernel.util.DateUtil;
018    import com.liferay.portal.model.UserTracker;
019    
020    import java.io.Serializable;
021    
022    import java.util.Comparator;
023    
024    /**
025     * @author Brian Wing Shun Chan
026     */
027    public class UserTrackerModifiedDateComparator
028            implements Comparator<UserTracker>, Serializable {
029    
030            public UserTrackerModifiedDateComparator() {
031                    this(false);
032            }
033    
034            public UserTrackerModifiedDateComparator(boolean ascending) {
035                    _ascending = ascending;
036            }
037    
038            @Override
039            public int compare(UserTracker userTracker1, UserTracker userTracker2) {
040                    int value = DateUtil.compareTo(
041                            userTracker1.getModifiedDate(), userTracker2.getModifiedDate());
042    
043                    if (_ascending) {
044                            return value;
045                    }
046                    else {
047                            return -value;
048                    }
049            }
050    
051            private boolean _ascending;
052    
053    }