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 * Classic splitter of OutputStream. Named after the unix 'tee'
24 * command. It allows a stream to be branched off so there
25 * are now two streams.
26 *
27 * @version $Id: TeeOutputStream.java 610010 2008-01-08 14:50:59Z niallp $
28 */
29 public class TeeOutputStream extends ProxyOutputStream {
30
31 /** the second OutputStream to write to */
32 protected OutputStream branch;
33
34 /**
35 * Constructs a TeeOutputStream.
36 * @param out the main OutputStream
37 * @param branch the second OutputStream
38 */
39 public TeeOutputStream( OutputStream out, OutputStream branch ) {
40 super(out);
41 this.branch = branch;
42 }
43
44 /**
45 * Write the bytes to both streams.
46 * @param b the bytes to write
47 * @throws IOException if an I/O error occurs
48 */
49 public synchronized void write(byte[] b) throws IOException {
50 super.write(b);
51 this.branch.write(b);
52 }
53
54 /**
55 * Write the specified bytes to both streams.
56 * @param b the bytes to write
57 * @param off The start offset
58 * @param len The number of bytes to write
59 * @throws IOException if an I/O error occurs
60 */
61 public synchronized void write(byte[] b, int off, int len) throws IOException {
62 super.write(b, off, len);
63 this.branch.write(b, off, len);
64 }
65
66 /**
67 * Write a byte to both streams.
68 * @param b the byte to write
69 * @throws IOException if an I/O error occurs
70 */
71 public synchronized void write(int b) throws IOException {
72 super.write(b);
73 this.branch.write(b);
74 }
75
76 /**
77 * Flushes both streams.
78 * @throws IOException if an I/O error occurs
79 */
80 public void flush() throws IOException {
81 super.flush();
82 this.branch.flush();
83 }
84
85 /**
86 * Closes both streams.
87 * @throws IOException if an I/O error occurs
88 */
89 public void close() throws IOException {
90 super.close();
91 this.branch.close();
92 }
93
94 }