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.portlet.journal.util.comparator;
016    
017    import com.liferay.portal.kernel.util.DateUtil;
018    import com.liferay.portal.kernel.util.OrderByComparator;
019    import com.liferay.portlet.journal.model.JournalArticle;
020    
021    /**
022     * @author Brian Wing Shun Chan
023     */
024    public class ArticleReviewDateComparator extends OrderByComparator {
025    
026            public static final String ORDER_BY_ASC =
027                    "JournalArticle.reviewDate ASC, JournalArticle.version ASC";
028    
029            public static final String ORDER_BY_DESC =
030                    "JournalArticle.reviewDate DESC, JournalArticle.version DESC";
031    
032            public static final String[] ORDER_BY_FIELDS = {"reviewDate", "version"};
033    
034            public ArticleReviewDateComparator() {
035                    this(false);
036            }
037    
038            public ArticleReviewDateComparator(boolean ascending) {
039                    _ascending = ascending;
040            }
041    
042            @Override
043            public int compare(Object obj1, Object obj2) {
044                    JournalArticle article1 = (JournalArticle)obj1;
045                    JournalArticle article2 = (JournalArticle)obj2;
046    
047                    int value = DateUtil.compareTo(
048                            article1.getReviewDate(), article2.getReviewDate());
049    
050                    if (value == 0) {
051                            if (article1.getVersion() < article2.getVersion()) {
052                                    value = -1;
053                            }
054                            else if (article1.getVersion() > article2.getVersion()) {
055                                    value = 1;
056                            }
057                    }
058    
059                    if (_ascending) {
060                            return value;
061                    }
062                    else {
063                            return -value;
064                    }
065            }
066    
067            @Override
068            public String getOrderBy() {
069                    if (_ascending) {
070                            return ORDER_BY_ASC;
071                    }
072                    else {
073                            return ORDER_BY_DESC;
074                    }
075            }
076    
077            @Override
078            public String[] getOrderByFields() {
079                    return ORDER_BY_FIELDS;
080            }
081    
082            @Override
083            public boolean isAscending() {
084                    return _ascending;
085            }
086    
087            private boolean _ascending;
088    
089    }