001 /****************************************************************
002 * Licensed to the Apache Software Foundation (ASF) under one *
003 * or more contributor license agreements. See the NOTICE file *
004 * distributed with this work for additional information *
005 * regarding copyright ownership. The ASF licenses this file *
006 * to you under the Apache License, Version 2.0 (the *
007 * "License"); you may not use this file except in compliance *
008 * with the License. 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, *
013 * software distributed under the License is distributed on an *
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
015 * KIND, either express or implied. See the License for the *
016 * specific language governing permissions and limitations *
017 * under the License. *
018 ****************************************************************/
019
020 package org.apache.james.repository.file;
021
022 import java.io.File;
023 import java.io.FilenameFilter;
024
025 /**
026 * This filters files based on the extension (what the filename ends with). This
027 * is used in retrieving all the files of a particular type.
028 *
029 * <p>
030 * Eg., to retrieve and print all <code>*.java</code> files in the current
031 * directory:
032 * </p>
033 *
034 * <pre>
035 * File dir = new File(".");
036 * String[] files = dir.list(new ExtensionFileFilter(new String[] { "java" }));
037 * for (int i = 0; i < files.length; i++) {
038 * System.out.println(files[i]);
039 * }
040 * </pre>
041 */
042 public class ExtensionFileFilter implements FilenameFilter {
043 private String[] m_extensions;
044
045 public ExtensionFileFilter(final String[] extensions) {
046 m_extensions = extensions;
047 }
048
049 public ExtensionFileFilter(final String extension) {
050 m_extensions = new String[] { extension };
051 }
052
053 public boolean accept(final File file, final String name) {
054 for (int i = 0; i < m_extensions.length; i++) {
055 if (name.endsWith(m_extensions[i])) {
056 return true;
057 }
058 }
059 return false;
060 }
061 }