1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.io.filefilter;
18
19 import java.io.File;
20 import java.io.Serializable;
21
22 /**
23 * A file filter that always returns true.
24 *
25 * @since 1.0
26 * @version $Id: TrueFileFilter.java 1415850 2012-11-30 20:51:39Z ggregory $
27 * @see FileFilterUtils#trueFileFilter()
28 */
29 public class TrueFileFilter implements IOFileFilter, Serializable {
30
31 /**
32 * Singleton instance of true filter.
33 * @since 1.3
34 */
35 public static final IOFileFilter TRUE = new TrueFileFilter();
36 /**
37 * Singleton instance of true filter.
38 * Please use the identical TrueFileFilter.TRUE constant.
39 * The new name is more JDK 1.5 friendly as it doesn't clash with other
40 * values when using static imports.
41 */
42 public static final IOFileFilter INSTANCE = TRUE;
43
44 /**
45 * Restrictive constructor.
46 */
47 protected TrueFileFilter() {
48 }
49
50 /**
51 * Returns true.
52 *
53 * @param file the file to check (ignored)
54 * @return true
55 */
56 public boolean accept(final File file) {
57 return true;
58 }
59
60 /**
61 * Returns true.
62 *
63 * @param dir the directory to check (ignored)
64 * @param name the filename (ignored)
65 * @return true
66 */
67 public boolean accept(final File dir, final String name) {
68 return true;
69 }
70
71 }