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.backgroundtask.util.comparator;
016    
017    import com.liferay.portal.kernel.backgroundtask.BackgroundTask;
018    import com.liferay.portal.kernel.util.DateUtil;
019    import com.liferay.portal.kernel.util.OrderByComparator;
020    
021    /**
022     * @author Eduardo Garcia
023     */
024    public class BackgroundTaskCompletionDateComparator
025            extends OrderByComparator<BackgroundTask> {
026    
027            public static final String ORDER_BY_ASC =
028                    "BackgroundTask.completionDate ASC";
029    
030            public static final String ORDER_BY_DESC =
031                    "BackgroundTask.completionDate DESC";
032    
033            public static final String[] ORDER_BY_FIELDS = {"completionDate"};
034    
035            public BackgroundTaskCompletionDateComparator() {
036                    this(false);
037            }
038    
039            public BackgroundTaskCompletionDateComparator(boolean ascending) {
040                    _ascending = ascending;
041            }
042    
043            @Override
044            public int compare(
045                    BackgroundTask backgroundTask1, BackgroundTask backgroundTask2) {
046    
047                    int value = DateUtil.compareTo(
048                            backgroundTask1.getCompletionDate(),
049                            backgroundTask2.getCompletionDate());
050    
051                    if (_ascending) {
052                            return value;
053                    }
054                    else {
055                            return -value;
056                    }
057            }
058    
059            @Override
060            public String getOrderBy() {
061                    if (_ascending) {
062                            return ORDER_BY_ASC;
063                    }
064                    else {
065                            return ORDER_BY_DESC;
066                    }
067            }
068    
069            @Override
070            public String[] getOrderByFields() {
071                    return ORDER_BY_FIELDS;
072            }
073    
074            @Override
075            public boolean isAscending() {
076                    return _ascending;
077            }
078    
079            private final boolean _ascending;
080    
081    }