001/*-------------------------------------------------------------------------+
002|                                                                          |
003| Copyright 2005-2011 The ConQAT Project                                   |
004|                                                                          |
005| Licensed under the Apache License, Version 2.0 (the "License");          |
006| you may not use this file except in compliance with the License.         |
007| You may obtain a copy of the License at                                  |
008|                                                                          |
009|    http://www.apache.org/licenses/LICENSE-2.0                            |
010|                                                                          |
011| Unless required by applicable law or agreed to in writing, software      |
012| distributed under the License is distributed on an "AS IS" BASIS,        |
013| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
014| See the License for the specific language governing permissions and      |
015| limitations under the License.                                           |
016+-------------------------------------------------------------------------*/
017package org.conqat.lib.commons.filesystem;
018
019import java.io.File;
020import java.util.Comparator;
021
022/**
023 * Compares files based on the lexical order of their fully qualified names.
024 * Files must not be null.
025 * 
026 * @author juergens
027 */
028public class FilenameComparator implements Comparator<File> {
029
030        /** {@inheritDoc} */
031        @Override
032        public int compare(File file1, File file2) {
033                if (file1 == null || file2 == null) {
034                        throw new IllegalArgumentException("Files must not be null");
035                }
036
037                return file1.getAbsolutePath().compareTo(file2.getAbsolutePath());
038        }
039
040}