1 package org.apache.commons.jcs.admin;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.io.IOException;
23 import java.io.OutputStream;
24
25 /**
26 * Keeps track of the number of bytes written to it, but doesn't write them anywhere.
27 */
28 public class CountingOnlyOutputStream
29 extends OutputStream
30 {
31 /** number of bytes passed through */
32 private int count; // TODO should this be long?
33
34 /**
35 * count as we write.
36 * <p>
37 * @param b
38 * @throws IOException
39 */
40 @Override
41 public void write( byte[] b )
42 throws IOException
43 {
44 this.count += b.length;
45 }
46
47 /**
48 * count as we write.
49 * <p>
50 * @param b
51 * @param off
52 * @param len
53 * @throws IOException
54 */
55 @Override
56 public void write( byte[] b, int off, int len )
57 throws IOException
58 {
59 this.count += len;
60 }
61
62 /**
63 * count as we write.
64 * <p>
65 * @param b
66 * @throws IOException
67 */
68 @Override
69 public void write( int b )
70 throws IOException
71 {
72 this.count++;
73 }
74
75 /**
76 * The number of bytes that have passed through this stream.
77 * <p>
78 * @return int
79 */
80 public int getCount()
81 {
82 return this.count;
83 }
84 }