+++ /dev/null
-/*
- * $Id: StreamUtilities.java,v 1.3 2003/03/07 10:09:50 jeremias Exp $
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
-package org.apache.fop.util;
-
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.EOFException;
-import java.io.DataInput;
-import java.io.DataOutput;
-import java.util.zip.CRC32;
-
-/**
- * General handy stream i/o methods.
- */
-public class StreamUtilities {
-
- /**
- * Size of buffers. Duh.
- */
- public static final int BUFFER_SIZE = 4096; // cuz I like big buffers...
-
- /**
- * Binary copies bytes from an input stream to an output stream.
- * The process is buffered, so you shouldn't need
- * BufferedInput/OutputStreams. Flushes when it's finished, but does
- * not close either stream. Returns the number of bytes copied.
- * @param source InputStream to read from
- * @param sink OutputStream to write to
- * @return long the total number of bytes copied
- * @throws IOException In case of an I/O problem
- */
- public static long streamCopy(InputStream source,
- OutputStream sink) throws IOException {
- // set table
- byte[] buffer = new byte[BUFFER_SIZE];
- long total = 0;
-
- // trough
- int scoop;
- while ((scoop = source.read(buffer)) >= 0) {
- if (scoop == 0) {
- System.out.println("zero scoop!");
- }
- sink.write(buffer, 0, scoop);
- total += scoop;
- }
-
- // do dishes
- sink.flush();
-
- return total;
- }
-
- /**
- * Method streamCopy.
- */
- /**
- * Binary copies up to the given number of bytes from an input
- * stream to an output stream. The process is buffered, so you
- * shouldn't need BufferedInput/OutputStreams.
- * Flushes when it's finished, but does not close either stream.
- * Throws an EOFExeption if there aren't enough bytes available to
- * transfer the requested amount.
- * @param source InputStream to read from
- * @param sink OutputStream to write to
- * @param howMany requested amount of bytes that are to be copied
- * @return long the total number of bytes copied
- * @throws IOException In case of an I/O problem
- */
- public static long streamCopy(InputStream source,
- OutputStream sink, int howMany) throws IOException {
- // set table
- byte[] buffer = new byte[BUFFER_SIZE];
- int left = howMany;
-
- // trough
- int scoop;
- while (left > 0) {
- scoop = source.read(buffer, 0, Math.min(BUFFER_SIZE, left));
- if (scoop < 0) {
- throw new EOFException(
- "Not enough bytes to feed you in "
- + "IOLib.streamCopy(source, sink, howMany); you asked for "
- + howMany + " and I only have " + (howMany - left));
- }
-
- sink.write(buffer, 0, scoop);
- left -= scoop;
- }
-
- // do dishes
- sink.flush();
-
- return howMany;
- }
-
- /**
- * Method streamCopyWithChecksum.
- */
- /**
- * Binary copies up to the given number of bytes from an input
- * stream to an output stream. The process is buffered, so you
- * shouldn't need BufferedInput/OutputStreams.
- * Flushes when it's finished, but does not close either stream.
- * Throws an EOFExeption if there aren't enough bytes available
- * to transfer the requested amount.
- * @param source InputStream to read from
- * @param sink OutputStream to write to
- * @param howMany requested amount of bytes that are to be copied
- * @return long the checksum of the bytes copied
- * @throws IOException In case of an I/O problem
- */
- public static long streamCopyWithChecksum(InputStream source,
- OutputStream sink, int howMany) throws IOException {
- // set table
- byte[] buffer = new byte[BUFFER_SIZE];
- int left = howMany;
- CRC32 checksummer = new CRC32();
-
- // trough
- int scoop;
- while (left > 0) {
- scoop = source.read(buffer, 0, Math.min(BUFFER_SIZE, left));
- if (scoop < 0) {
- throw new EOFException("Not enough bytes to feed you in "
- + "IOLib.streamCopy(source, sink, howMany)");
- }
-
- checksummer.update(buffer, 0, scoop);
- sink.write(buffer, 0, scoop);
- left -= scoop;
- }
-
- // do dishes
- sink.flush();
-
- return checksummer.getValue();
- }
-
- /**
- * Method dataCopy.
- */
- /**
- * Binary copies up to the given number of bytes from a DataInput
- * object to an DataOutput object. The process is buffered. Since
- * DataOutput doesn't support closing or flushing, it does neither.
- * @param source DataInput to read from
- * @param sink DataOutput to write to
- * @param howMany requested amount of bytes that are to be copied
- * @return long the total number of bytes copied
- * @throws IOException In case of an I/O problem
- */
- public static long dataCopy(DataInput source, DataOutput sink,
- int howMany) throws IOException {
- // set table
- byte[] buffer = new byte[BUFFER_SIZE];
- int left = howMany;
-
- // trough
- int scoop;
- while (left > 0) {
- scoop = Math.min(BUFFER_SIZE, left);
- source.readFully(buffer, 0, scoop);
- sink.write(buffer, 0, scoop);
- left -= scoop;
- }
-
- // do dishes
- return howMany;
- }
-
-
- /**
- * Loads the contents of the InputStream to a byte array. The InputStream
- * isn't closed.
- * @param in InputStream to read from
- * @param initialTargetBufferSize initial number of bytes to allocate
- * (expected size to avoid a lot of reallocations)
- * @return byte[] the array of bytes requested
- * @throws IOException In case of an I/O problem
- */
- public static byte[] toByteArray(InputStream in, int initialTargetBufferSize)
- throws IOException {
- ByteArrayOutputStream baout = new ByteArrayOutputStream(initialTargetBufferSize);
- try {
- streamCopy(in, baout);
- } finally {
- baout.close();
- }
- return baout.toByteArray();
- }
-
-}
projects / xmlgraphics-fop.git / commitdiff