001    /**
002     * Copyright (c) 2000-2013 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.portal.kernel.io;
016    
017    import java.io.File;
018    import java.io.FileFilter;
019    
020    import java.util.regex.Matcher;
021    import java.util.regex.Pattern;
022    
023    /**
024     * @author Brian Wing Shun Chan
025     * @author Alexander Chow
026     */
027    public class DirectoryFilter implements FileFilter {
028    
029            public DirectoryFilter() {
030            }
031    
032            public DirectoryFilter(String regex) {
033                    _pattern = Pattern.compile(regex);
034            }
035    
036            @Override
037            public boolean accept(File file) {
038                    if (file.isDirectory()) {
039                            if (_pattern == null) {
040                                    return true;
041                            }
042                            else {
043                                    Matcher matcher = _pattern.matcher(file.getName());
044    
045                                    return matcher.matches();
046                            }
047                    }
048                    else {
049                            return false;
050                    }
051            }
052    
053            private Pattern _pattern;
054    
055    }