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.kernel.util;
016    
017    import java.util.Comparator;
018    import java.util.Locale;
019    import java.util.TimeZone;
020    
021    /**
022     * @author Brian Wing Shun Chan
023     */
024    public class TimeZoneComparator implements Comparator<TimeZone> {
025    
026            public TimeZoneComparator(Locale locale) {
027                    _locale = locale;
028            }
029    
030            @Override
031            public int compare(TimeZone timeZone1, TimeZone timeZone2) {
032                    Integer rawOffset1 = timeZone1.getRawOffset();
033                    Integer rawOffset2 = timeZone2.getRawOffset();
034    
035                    int value = rawOffset1.compareTo(rawOffset2);
036    
037                    if (value == 0) {
038                            String displayName1 = timeZone1.getDisplayName(_locale);
039                            String displayName2 = timeZone2.getDisplayName(_locale);
040    
041                            value = displayName1.compareTo(displayName2);
042                    }
043    
044                    return value;
045            }
046    
047            private Locale _locale;
048    
049    }