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comparison src/com/go/trove/util/DeflaterOutputStream.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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1 /* ====================================================================
2 * Trove - Copyright (c) 1997-2001 Walt Disney Internet Group
3 * ====================================================================
4 * The Tea Software License, Version 1.1
5 *
6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. The end-user documentation included with the redistribution,
21 * if any, must include the following acknowledgment:
22 * "This product includes software developed by the
23 * Walt Disney Internet Group (http://opensource.go.com/)."
24 * Alternately, this acknowledgment may appear in the software itself,
25 * if and wherever such third-party acknowledgments normally appear.
26 *
27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
28 * not be used to endorse or promote products derived from this
29 * software without prior written permission. For written
30 * permission, please contact opensource@dig.com.
31 *
32 * 5. Products derived from this software may not be called "Tea",
33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
35 * written permission of the Walt Disney Internet Group.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * For more information about Tea, please see http://opensource.go.com/.
51 */
52
53 package com.go.trove.util;
54
55 import java.io.*;
56
57 /******************************************************************************
58 * Just like {@link java.util.zip.DeflaterOutputStream}, except uses a
59 * different {@link Deflater} implementation.
60 *
61 * @author Brian S O'Neill
62 * @version
63 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/06/13 <!-- $-->
64 */
65 public class DeflaterOutputStream extends FilterOutputStream {
66 protected Deflater mDeflater;
67 protected byte[] mBuffer;
68
69 public DeflaterOutputStream(OutputStream out, Deflater def, byte[] buf) {
70 super(out);
71 mDeflater = def;
72 mBuffer = buf;
73 }
74
75 public DeflaterOutputStream(OutputStream out, Deflater def, int size) {
76 this(out, def, new byte[size]);
77 }
78
79 public DeflaterOutputStream(OutputStream out, Deflater def) {
80 this(out, def, 512);
81 }
82
83 public DeflaterOutputStream(OutputStream out) {
84 this(out, new Deflater());
85 }
86
87 public void write(int b) throws IOException {
88 write(new byte[]{(byte)b}, 0, 1);
89 }
90
91 public void write(byte[] b, int off, int len) throws IOException {
92 if (mDeflater.finished()) {
93 throw new IOException("write beyond end of stream");
94 }
95 mDeflater.setInput(b, off, len);
96 while (!mDeflater.needsInput()) {
97 deflate();
98 }
99 }
100
101 public void flush() throws IOException {
102 if (!mDeflater.finished()) {
103 mDeflater.flush();
104 int len;
105 do {
106 len = deflate();
107 } while (len == mBuffer.length);
108 }
109 }
110
111 public void fullFlush() throws IOException {
112 if (!mDeflater.finished()) {
113 mDeflater.fullFlush();
114 int len;
115 do {
116 len = deflate();
117 } while (len == mBuffer.length);
118 }
119 }
120
121 public void finish() throws IOException {
122 if (!mDeflater.finished()) {
123 mDeflater.finish();
124 do {
125 deflate();
126 } while (!mDeflater.finished());
127 }
128 }
129
130 public void close() throws IOException {
131 finish();
132 super.close();
133 }
134
135 private int deflate() throws IOException {
136 int len = mDeflater.deflate(mBuffer, 0, mBuffer.length);
137 if (len > 0) {
138 out.write(mBuffer, 0, len);
139 }
140 return len;
141 }
142 }