Mercurial > hg > blitz_stable
diff src/com/go/trove/util/DeflaterOutputStream.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/com/go/trove/util/DeflaterOutputStream.java Sat Mar 21 11:00:06 2009 +0000 @@ -0,0 +1,142 @@ +/* ==================================================================== + * Trove - Copyright (c) 1997-2001 Walt Disney Internet Group + * ==================================================================== + * The Tea Software License, Version 1.1 + * + * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, 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 + * Walt Disney Internet Group (http://opensource.go.com/)." + * Alternately, this acknowledgment may appear in the software itself, + * if and wherever such third-party acknowledgments normally appear. + * + * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must + * not be used to endorse or promote products derived from this + * software without prior written permission. For written + * permission, please contact opensource@dig.com. + * + * 5. Products derived from this software may not be called "Tea", + * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", + * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior + * written permission of the Walt Disney Internet Group. + * + * 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 WALT DISNEY INTERNET GROUP OR ITS + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 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. + * ==================================================================== + * + * For more information about Tea, please see http://opensource.go.com/. + */ + +package com.go.trove.util; + +import java.io.*; + +/****************************************************************************** + * Just like {@link java.util.zip.DeflaterOutputStream}, except uses a + * different {@link Deflater} implementation. + * + * @author Brian S O'Neill + * @version + * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/06/13 <!-- $--> + */ +public class DeflaterOutputStream extends FilterOutputStream { + protected Deflater mDeflater; + protected byte[] mBuffer; + + public DeflaterOutputStream(OutputStream out, Deflater def, byte[] buf) { + super(out); + mDeflater = def; + mBuffer = buf; + } + + public DeflaterOutputStream(OutputStream out, Deflater def, int size) { + this(out, def, new byte[size]); + } + + public DeflaterOutputStream(OutputStream out, Deflater def) { + this(out, def, 512); + } + + public DeflaterOutputStream(OutputStream out) { + this(out, new Deflater()); + } + + public void write(int b) throws IOException { + write(new byte[]{(byte)b}, 0, 1); + } + + public void write(byte[] b, int off, int len) throws IOException { + if (mDeflater.finished()) { + throw new IOException("write beyond end of stream"); + } + mDeflater.setInput(b, off, len); + while (!mDeflater.needsInput()) { + deflate(); + } + } + + public void flush() throws IOException { + if (!mDeflater.finished()) { + mDeflater.flush(); + int len; + do { + len = deflate(); + } while (len == mBuffer.length); + } + } + + public void fullFlush() throws IOException { + if (!mDeflater.finished()) { + mDeflater.fullFlush(); + int len; + do { + len = deflate(); + } while (len == mBuffer.length); + } + } + + public void finish() throws IOException { + if (!mDeflater.finished()) { + mDeflater.finish(); + do { + deflate(); + } while (!mDeflater.finished()); + } + } + + public void close() throws IOException { + finish(); + super.close(); + } + + private int deflate() throws IOException { + int len = mDeflater.deflate(mBuffer, 0, mBuffer.length); + if (len > 0) { + out.write(mBuffer, 0, len); + } + return len; + } +}