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.portlet.documentlibrary.model.DLFileVersion;
018    
019    import java.util.Comparator;
020    
021    /**
022     * @author Bruno Farache
023     */
024    public class DLFileVersionVersionComparator
025            implements Comparator<DLFileVersion> {
026    
027            public DLFileVersionVersionComparator() {
028                    this(false);
029            }
030    
031            public DLFileVersionVersionComparator(boolean ascending) {
032                    _versionNumberComparator = new VersionNumberComparator(ascending);
033            }
034    
035            @Override
036            public int compare(
037                    DLFileVersion dlFileVersion1, DLFileVersion dlFileVersion2) {
038    
039                    return _versionNumberComparator.compare(
040                            dlFileVersion1.getVersion(), dlFileVersion2.getVersion());
041            }
042    
043            public boolean isAscending() {
044                    return _versionNumberComparator.isAscending();
045            }
046    
047            private final VersionNumberComparator _versionNumberComparator;
048    
049    }