01: /****************************************************************
02: * Licensed to the Apache Software Foundation (ASF) under one *
03: * or more contributor license agreements. See the NOTICE file *
04: * distributed with this work for additional information *
05: * regarding copyright ownership. The ASF licenses this file *
06: * to you under the Apache License, Version 2.0 (the *
07: * "License"); you may not use this file except in compliance *
08: * with the License. You may obtain a copy of the License at *
09: * *
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: ****************************************************************/package org.apache.james.util;
19:
20: import java.io.IOException;
21: import java.io.InputStream;
22:
23: /**
24: * Reads data off a stream, printing every byte read to System.err.
25: */
26: public class DebugInputStream extends InputStream {
27:
28: /**
29: * The input stream being wrapped
30: */
31: InputStream in = null;
32:
33: /**
34: * Constructor that takes an InputStream to be wrapped.
35: *
36: * @param in the InputStream to be wrapped
37: */
38: public DebugInputStream(InputStream in) {
39: this .in = in;
40: }
41:
42: /**
43: * Read a byte off the stream
44: *
45: * @return the byte read off the stream
46: * @throws IOException if an exception is encountered when reading
47: */
48: public int read() throws IOException {
49: int b = in.read();
50: System.err.write(b);
51: return b;
52: }
53:
54: /**
55: * Close the stream
56: *
57: * @throws IOException if an exception is encountered when closing
58: */
59: public void close() throws IOException {
60: in.close();
61: }
62: }
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