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.output;
18
19 import java.io.IOException;
20 import java.io.OutputStream;
21
22 /**
23 * This OutputStream writes all data to the famous <b>/dev/null</b>.
24 * <p>
25 * This output stream has no destination (file/socket etc.) and all
26 * bytes written to it are ignored and lost.
27 *
28 * @version $Id: NullOutputStream.java 1302056 2012-03-18 03:03:38Z ggregory $
29 */
30 public class NullOutputStream extends OutputStream {
31
32 /**
33 * A singleton.
34 */
35 public static final NullOutputStream NULL_OUTPUT_STREAM = new NullOutputStream();
36
37 /**
38 * Does nothing - output to <code>/dev/null</code>.
39 * @param b The bytes to write
40 * @param off The start offset
41 * @param len The number of bytes to write
42 */
43 @Override
44 public void write(byte[] b, int off, int len) {
45 //to /dev/null
46 }
47
48 /**
49 * Does nothing - output to <code>/dev/null</code>.
50 * @param b The byte to write
51 */
52 @Override
53 public void write(int b) {
54 //to /dev/null
55 }
56
57 /**
58 * Does nothing - output to <code>/dev/null</code>.
59 * @param b The bytes to write
60 * @throws IOException never
61 */
62 @Override
63 public void write(byte[] b) throws IOException {
64 //to /dev/null
65 }
66
67 }