001    /*--------------------------------------------------------------------------+
002    $Id: FilenameComparator.java 26268 2010-02-18 10:44:30Z juergens $
003    |                                                                          |
004    | Copyright 2005-2010 Technische Universitaet Muenchen                     |
005    |                                                                          |
006    | Licensed under the Apache License, Version 2.0 (the "License");          |
007    | you may not use this file except in compliance with the License.         |
008    | You may obtain a copy of the License at                                  |
009    |                                                                          |
010    |    http://www.apache.org/licenses/LICENSE-2.0                            |
011    |                                                                          |
012    | Unless required by applicable law or agreed to in writing, software      |
013    | distributed under the License is distributed on an "AS IS" BASIS,        |
014    | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
015    | See the License for the specific language governing permissions and      |
016    | limitations under the License.                                           |
017    +--------------------------------------------------------------------------*/
018    package edu.tum.cs.commons.filesystem;
019    
020    import java.io.File;
021    import java.util.Comparator;
022    
023    /**
024     * Compares files based on the lexical order of their fully qualified names.
025     * Files must not be null.
026     * 
027     * @author juergens
028     * @author $Author: juergens $
029     * @version $Rev: 26268 $
030     * @levd.rating GREEN Hash: 58C92A2D888E51D9684AE5394A7D3FDF
031     */
032    public class FilenameComparator implements Comparator<File> {
033    
034            /** {@inheritDoc} */
035            public int compare(File file1, File file2) {
036                    if (file1 == null || file2 == null) {
037                            throw new IllegalArgumentException("Files must not be null");
038                    }
039    
040                    return file1.getAbsolutePath().compareTo(file2.getAbsolutePath());
041            }
042    
043    }