1 /*****************************************************************
2 * Licensed to the Apache Software Foundation (ASF) under one *
3 * or more contributor license agreements. See the NOTICE file *
4 * distributed with this work for additional information *
5 * regarding copyright ownership. The ASF licenses this file *
6 * to you under the Apache License, Version 2.0 (the *
7 * "License"); you may not use this file except in compliance *
8 * with the License. You may obtain a copy of the License at *
9 * *
10 * http://www.apache.org/licenses/LICENSE-2.0 *
11 * *
12 * Unless required by applicable law or agreed to in writing, *
13 * software distributed under the License is distributed on an *
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
15 * KIND, either express or implied. See the License for the *
16 * specific language governing permissions and limitations *
17 * under the License. *
18 ****************************************************************/
19
20 package org.apache.james.util;
21
22 import java.io.IOException;
23 import java.io.InputStream;
24
25 /***
26 * Reads data off a stream, printing every byte read to System.err.
27 */
28 public class DebugInputStream extends InputStream {
29
30 /***
31 * The input stream being wrapped
32 */
33 InputStream in = null;
34
35 /***
36 * Constructor that takes an InputStream to be wrapped.
37 *
38 * @param in the InputStream to be wrapped
39 */
40 public DebugInputStream(InputStream in) {
41 this.in = in;
42 }
43
44 /***
45 * Read a byte off the stream
46 *
47 * @return the byte read off the stream
48 * @throws IOException if an exception is encountered when reading
49 */
50 public int read() throws IOException {
51 int b = in.read();
52 System.err.write(b);
53 return b;
54 }
55
56 /***
57 * Close the stream
58 *
59 * @throws IOException if an exception is encountered when closing
60 */
61 public void close() throws IOException {
62 in.close();
63 }
64 }