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