001    /*--------------------------------------------------------------------------+
002    $Id: FileExtensionFilter.java 26283 2010-02-18 11:18:57Z 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    
022    import edu.tum.cs.commons.string.StringUtils;
023    
024    /**
025     * This is a file filter finding only "normal" files having one of the specified
026     * extensions.
027     * 
028     * @author Benjamin Hummel
029     * @author Florian Deissenboeck
030     * @author $Author: juergens $
031     * @version $Rev: 26283 $
032     * @levd.rating GREEN Hash: 9F45801971F39E82A3241CF6B2E64CE6
033     */
034    public class FileExtensionFilter extends FileOnlyFilter {
035    
036            /** The extension to match. */
037            private final String[] extensions;
038    
039            /**
040             * Creates a new file extension filter.
041             * 
042             * @param extensions
043             *            the extension required by the files (without the dot). Note
044             *            that using an empty string will not find all files without
045             *            extension, but rather those ending in a single dot.
046             */
047            public FileExtensionFilter(String... extensions) {
048                    this.extensions = new String[extensions.length];
049                    for (int i = 0; i < extensions.length; i++) {
050                            this.extensions[i] = "." + extensions[i];
051                    }
052            }
053    
054            /** {@inheritDoc} */
055            @Override
056            public boolean accept(File file) {
057                    return super.accept(file)
058                                    && StringUtils.endsWithOneOf(file.getName(), extensions);
059            }
060    }