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 ArticleCreateDateComparator extends OrderByComparator {
025    
026            public static final String ORDER_BY_ASC = "JournalArticle.createDate ASC";
027    
028            public static final String ORDER_BY_DESC = "JournalArticle.createDate DESC";
029    
030            public static final String[] ORDER_BY_FIELDS = {"createDate"};
031    
032            public ArticleCreateDateComparator() {
033                    this(false);
034            }
035    
036            public ArticleCreateDateComparator(boolean ascending) {
037                    _ascending = ascending;
038            }
039    
040            @Override
041            public int compare(Object obj1, Object obj2) {
042                    JournalArticle article1 = (JournalArticle)obj1;
043                    JournalArticle article2 = (JournalArticle)obj2;
044    
045                    int value = DateUtil.compareTo(
046                            article1.getCreateDate(), article2.getCreateDate());
047    
048                    if (_ascending) {
049                            return value;
050                    }
051                    else {
052                            return -value;
053                    }
054            }
055    
056            @Override
057            public String getOrderBy() {
058                    if (_ascending) {
059                            return ORDER_BY_ASC;
060                    }
061                    else {
062                            return ORDER_BY_DESC;
063                    }
064            }
065    
066            @Override
067            public String[] getOrderByFields() {
068                    return ORDER_BY_FIELDS;
069            }
070    
071            @Override
072            public boolean isAscending() {
073                    return _ascending;
074            }
075    
076            private boolean _ascending;
077    
078    }