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Java example source code file (CheckedInputStream.java)
The CheckedInputStream.java Java example source code/* * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.util.zip; import java.io.FilterInputStream; import java.io.InputStream; import java.io.IOException; /** * An input stream that also maintains a checksum of the data being read. * The checksum can then be used to verify the integrity of the input data. * * @see Checksum * @author David Connelly */ public class CheckedInputStream extends FilterInputStream { private Checksum cksum; /** * Creates an input stream using the specified Checksum. * @param in the input stream * @param cksum the Checksum */ public CheckedInputStream(InputStream in, Checksum cksum) { super(in); this.cksum = cksum; } /** * Reads a byte. Will block if no input is available. * @return the byte read, or -1 if the end of the stream is reached. * @exception IOException if an I/O error has occurred */ public int read() throws IOException { int b = in.read(); if (b != -1) { cksum.update(b); } return b; } /** * Reads into an array of bytes. If <code>len is not zero, the method * blocks until some input is available; otherwise, no * bytes are read and <code>0 is returned. * @param buf the buffer into which the data is read * @param off the start offset in the destination array <code>b * @param len the maximum number of bytes read * @return the actual number of bytes read, or -1 if the end * of the stream is reached. * @exception NullPointerException If <code>buf is Other Java examples (source code examples)Here is a short list of links related to this Java CheckedInputStream.java source code file: |
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