1 /****************************************************************
2 * Licensed to the Apache Software Foundation (ASF) under one *
3 * or more contributor license agreements. See the NOTICE file *
4 * distributed with this work for additional information *
5 * regarding copyright ownership. The ASF licenses this file *
6 * to you under the Apache License, Version 2.0 (the *
7 * "License"); you may not use this file except in compliance *
8 * with the License. You may obtain a copy of the License at *
9 * *
10 * http://www.apache.org/licenses/LICENSE-2.0 *
11 * *
12 * Unless required by applicable law or agreed to in writing, *
13 * software distributed under the License is distributed on an *
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
15 * KIND, either express or implied. See the License for the *
16 * specific language governing permissions and limitations *
17 * under the License. *
18 ****************************************************************/
19
20
21
22 package org.apache.james.util.io;
23
24 import java.io.File;
25 import java.io.FilenameFilter;
26
27 /**
28 * This filters files based on the extension (what the filename
29 * ends with). This is used in retrieving all the files of a
30 * particular type.
31 *
32 * <p>Eg., to retrieve and print all <code>*.java</code> files in the current directory:</p>
33 *
34 * <pre>
35 * File dir = new File(".");
36 * String[] files = dir.list( new ExtensionFileFilter( new String[]{"java"} ) );
37 * for (int i=0; i<files.length; i++)
38 * {
39 * System.out.println(files[i]);
40 * }
41 * </pre>
42 *
43 * @version CVS $Revision: 464742 $ $Date: 2006-10-17 00:53:00 +0100 (Tue, 17 Oct 2006) $
44 */
45 public class ExtensionFileFilter
46 implements FilenameFilter
47 {
48 private String[] m_extensions;
49
50 public ExtensionFileFilter( final String[] extensions )
51 {
52 m_extensions = extensions;
53 }
54
55 public ExtensionFileFilter( final String extension )
56 {
57 m_extensions = new String[]{extension};
58 }
59
60 public boolean accept( final File file, final String name )
61 {
62 for( int i = 0; i < m_extensions.length; i++ )
63 {
64 if( name.endsWith( m_extensions[ i ] ) )
65 {
66 return true;
67 }
68 }
69 return false;
70 }
71 }
72
73