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Java > Open Source Codes > org > apache > tools > ant > util > TeeOutputStream


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  */
18
19 package org.apache.tools.ant.util;
20
21 import java.io.OutputStream JavaDoc;
22 import java.io.IOException JavaDoc;
23
24 /**
25  * A simple T-piece to replicate an output stream into two separate streams
26  *
27  */
28 public class TeeOutputStream extends OutputStream JavaDoc {
29     private OutputStream JavaDoc left;
30     private OutputStream JavaDoc right;
31
32     /**
33      * Constructor for TeeOutputStream.
34      * @param left one of the output streams.
35      * @param right the other output stream.
36      */
37     public TeeOutputStream(OutputStream JavaDoc left, OutputStream JavaDoc right) {
38         this.left = left;
39         this.right = right;
40     }
41
42     /**
43      * Close both output streams.
44      * @throws IOException on error.
45      */
46     public void close() throws IOException JavaDoc {
47         try {
48             left.close();
49         } finally {
50             right.close();
51         }
52     }
53
54     /**
55      * Flush both output streams.
56      * @throws IOException on error
57      */
58     public void flush() throws IOException JavaDoc {
59         left.flush();
60         right.flush();
61     }
62
63     /**
64      * Write a byte array to both output streams.
65      * @param b an array of bytes.
66      * @throws IOException on error.
67      */
68     public void write(byte[] b) throws IOException JavaDoc {
69         left.write(b);
70         right.write(b);
71     }
72
73     /**
74      * Write a byte array to both output streams.
75      * @param b the data.
76      * @param off the start offset in the data.
77      * @param len the number of bytes to write.
78      * @throws IOException on error.
79      */
80     public void write(byte[] b, int off, int len) throws IOException JavaDoc {
81         left.write(b, off, len);
82         right.write(b, off, len);
83     }
84
85     /**
86      * Write a byte to both output streams.
87      * @param b the byte to write.
88      * @throws IOException on error.
89      */
90     public void write(int b) throws IOException JavaDoc {
91         left.write(b);
92         right.write(b);
93     }
94 }
95
96
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