001    /**
002     * Copyright (c) 2000-present 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.portlet.blogs.util.comparator;
016    
017    import com.liferay.portal.kernel.util.DateUtil;
018    import com.liferay.portal.kernel.util.OrderByComparator;
019    import com.liferay.portlet.blogs.model.BlogsStatsUser;
020    
021    /**
022     * @author Brian Wing Shun Chan
023     */
024    public class StatsUserLastPostDateComparator
025            extends OrderByComparator<BlogsStatsUser> {
026    
027            public static final String ORDER_BY_ASC = "BlogsStatsUser.lastPostDate ASC";
028    
029            public static final String ORDER_BY_DESC =
030                    "BlogsStatsUser.lastPostDate DESC";
031    
032            public static final String[] ORDER_BY_FIELDS = {"lastPostDate"};
033    
034            public StatsUserLastPostDateComparator() {
035                    this(false);
036            }
037    
038            public StatsUserLastPostDateComparator(boolean ascending) {
039                    _ascending = ascending;
040            }
041    
042            @Override
043            public int compare(BlogsStatsUser statsUser1, BlogsStatsUser statsUser2) {
044                    int value = DateUtil.compareTo(
045                            statsUser1.getLastPostDate(), statsUser2.getLastPostDate());
046    
047                    if (_ascending) {
048                            return value;
049                    }
050                    else {
051                            return -value;
052                    }
053            }
054    
055            @Override
056            public String getOrderBy() {
057                    if (_ascending) {
058                            return ORDER_BY_ASC;
059                    }
060                    else {
061                            return ORDER_BY_DESC;
062                    }
063            }
064    
065            @Override
066            public String[] getOrderByFields() {
067                    return ORDER_BY_FIELDS;
068            }
069    
070            @Override
071            public boolean isAscending() {
072                    return _ascending;
073            }
074    
075            private final boolean _ascending;
076    
077    }