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