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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.tika.io;
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   * @author Jeremias Maerki
29   * @since Apache Tika 0.4, copied from Commons IO 1.4
30   */
31  public 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      @Override
45      public void write(byte[] b, int off, int len) {
46          //to /dev/null
47      }
48  
49      /**
50       * Does nothing - output to <code>/dev/null</code>.
51       * @param b The byte to write
52       */
53      @Override
54      public void write(int b) {
55          //to /dev/null
56      }
57  
58      /**
59       * Does nothing - output to <code>/dev/null</code>.
60       * @param b The bytes to write
61       * @throws IOException never
62       */
63      @Override
64      public void write(byte[] b) throws IOException {
65          //to /dev/null
66      }
67  
68  }