2 * Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
4 * The Sun Project JXTA(TM) Software License
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
16 * 3. The end-user documentation included with the redistribution, if any, must
17 * include the following acknowledgment: "This product includes software
18 * developed by Sun Microsystems, Inc. for JXTA(TM) technology."
19 * Alternately, this acknowledgment may appear in the software itself, if
20 * and wherever such third-party acknowledgments normally appear.
22 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
23 * not be used to endorse or promote products derived from this software
24 * without prior written permission. For written permission, please contact
25 * Project JXTA at http://www.jxta.org.
27 * 5. Products derived from this software may not be called "JXTA", nor may
28 * "JXTA" appear in their name, without prior written permission of Sun.
30 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
32 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN
33 * MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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37 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
38 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
39 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 * JXTA is a registered trademark of Sun Microsystems, Inc. in the United
42 * States and other countries.
44 * Please see the license information page at :
45 * <http://www.jxta.org/project/www/license.html> for instructions on use of
46 * the license in source files.
48 * ====================================================================
50 * This software consists of voluntary contributions made by many individuals
51 * on behalf of Project JXTA. For more information on Project JXTA, please see
52 * http://www.jxta.org.
54 * This license is based on the BSD license adopted by the Apache Foundation.
57 package net.jxta.util;
64 * A filter input stream which counts the bytes read from the stream. A filter
65 * so that you don't have to count seperately from reading from the inoput
68 public class CountingInputStream extends FilterInputStream {
71 * For recursion detection to prevent overcounting.
73 private transient boolean alreadycounting;
76 * number of bytes which have been read on this stream
78 private long bytesRead = 0;
81 * Make a new Counting Input Stream
83 public CountingInputStream(InputStream in) {
90 * <p/>Debugging toString.
93 public String toString() {
95 return "closed/" + super.toString();
97 return in.toString() + "/" + super.toString();
104 * <p/>Merely calls the super version.
107 public synchronized int read() throws IOException {
108 boolean wascounting = alreadycounting;
110 alreadycounting = true;
111 int i = super.read();
113 alreadycounting = wascounting;
115 if (!alreadycounting && (i != -1)) {
124 * <p/>calls the super version of the same method.
127 public synchronized int read(byte[] b, int off, int len) throws IOException {
128 boolean wascounting = alreadycounting;
130 alreadycounting = true;
132 int i = super.read(b, off, len);
134 alreadycounting = wascounting;
136 if ((-1 != i) && !alreadycounting) {
144 * Returns the number of bytes read fromthe stream thus far. This and all
145 * the methods in this class are synchronized because bytesRead cannot be
148 * @return long containing the number of bytes read.
150 public synchronized long getBytesRead() {