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.documentlibrary.util.comparator;
016    
017    import com.liferay.portal.kernel.util.DateUtil;
018    import com.liferay.portal.kernel.util.OrderByComparator;
019    import com.liferay.portlet.documentlibrary.model.DLFileRank;
020    
021    /**
022     * @author Brian Wing Shun Chan
023     */
024    public class FileRankCreateDateComparator
025            extends OrderByComparator<DLFileRank> {
026    
027            public static final String ORDER_BY_ASC = "DLFileRank.createDate ASC";
028    
029            public static final String ORDER_BY_DESC = "DLFileRank.createDate DESC";
030    
031            public static final String[] ORDER_BY_FIELDS = {"createDate"};
032    
033            public FileRankCreateDateComparator() {
034                    this(false);
035            }
036    
037            public FileRankCreateDateComparator(boolean ascending) {
038                    _ascending = ascending;
039            }
040    
041            @Override
042            public int compare(DLFileRank dlFileRank1, DLFileRank dlFileRank2) {
043                    int value = DateUtil.compareTo(
044                            dlFileRank1.getCreateDate(), dlFileRank2.getCreateDate());
045    
046                    if (_ascending) {
047                            return value;
048                    }
049                    else {
050                            return -value;
051                    }
052            }
053    
054            @Override
055            public String getOrderBy() {
056                    if (_ascending) {
057                            return ORDER_BY_ASC;
058                    }
059                    else {
060                            return ORDER_BY_DESC;
061                    }
062            }
063    
064            @Override
065            public String[] getOrderByFields() {
066                    return ORDER_BY_FIELDS;
067            }
068    
069            @Override
070            public boolean isAscending() {
071                    return _ascending;
072            }
073    
074            private final boolean _ascending;
075    
076    }