NullOutputStream.java revision 4ebb916ddca5f59d4f854f104fca0de6e0dda706 
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 */
17package org.apache.commons.io.output;
18
19import java.io.IOException;
20import 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 * @author Jeremias Maerki
29 * @version $Id: NullOutputStream.java 610010 2008-01-08 14:50:59Z niallp $
30 */
31public class NullOutputStream extends OutputStream {
32
33    /**
34     * A singleton.
35     */
36    public static final NullOutputStream NULL_OUTPUT_STREAM = new NullOutputStream();
37
38    /**
39     * Does nothing - output to <code>/dev/null</code>.
40     * @param b The bytes to write
41     * @param off The start offset
42     * @param len The number of bytes to write
43     */
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    public void write(int b) {
53        //to /dev/null
54    }
55
56    /**
57     * Does nothing - output to <code>/dev/null</code>.
58     * @param b The bytes to write
59     * @throws IOException never
60     */
61    public void write(byte[] b) throws IOException {
62        //to /dev/null
63    }
64
65}
66