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annotate src/org/eclipse/jetty/io/AbstractBuffers.java @ 889:5731a7707466

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author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 06 Oct 2016 23:24:30 -0600
parents 3428c60d7cfc
children 58a9c4a42292
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.io;
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20
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21 import org.eclipse.jetty.io.nio.DirectNIOBuffer;
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22 import org.eclipse.jetty.io.nio.IndirectNIOBuffer;
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23
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24 public abstract class AbstractBuffers implements Buffers
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25 {
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26 protected final Buffers.Type _headerType;
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27 protected final int _headerSize;
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28 protected final Buffers.Type _bufferType;
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29 protected final int _bufferSize;
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30 protected final Buffers.Type _otherType;
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31
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32 /* ------------------------------------------------------------ */
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33 public AbstractBuffers(Buffers.Type headerType, int headerSize, Buffers.Type bufferType, int bufferSize, Buffers.Type otherType)
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34 {
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35 _headerType=headerType;
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36 _headerSize=headerSize;
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37 _bufferType=bufferType;
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38 _bufferSize=bufferSize;
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39 _otherType=otherType;
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40 }
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41
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42 /* ------------------------------------------------------------ */
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43 /**
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44 * @return Returns the buffer size in bytes.
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45 */
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46 public int getBufferSize()
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47 {
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48 return _bufferSize;
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49 }
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50
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51 /* ------------------------------------------------------------ */
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52 /**
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53 * @return Returns the header size in bytes.
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54 */
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55 public int getHeaderSize()
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56 {
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57 return _headerSize;
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58 }
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59
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60
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61 /* ------------------------------------------------------------ */
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62 /**
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63 * Create a new header Buffer
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64 * @return new Buffer
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65 */
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66 final protected Buffer newHeader()
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67 {
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68 switch(_headerType)
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69 {
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70 case BYTE_ARRAY:
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71 return new ByteArrayBuffer(_headerSize);
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72 case DIRECT:
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73 return new DirectNIOBuffer(_headerSize);
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74 case INDIRECT:
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75 return new IndirectNIOBuffer(_headerSize);
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76 }
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77 throw new IllegalStateException();
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78 }
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79
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80 /* ------------------------------------------------------------ */
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81 /**
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82 * Create a new content Buffer
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83 * @return new Buffer
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84 */
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85 final protected Buffer newBuffer()
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86 {
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87 switch(_bufferType)
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88 {
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89 case BYTE_ARRAY:
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90 return new ByteArrayBuffer(_bufferSize);
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91 case DIRECT:
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92 return new DirectNIOBuffer(_bufferSize);
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93 case INDIRECT:
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94 return new IndirectNIOBuffer(_bufferSize);
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95 }
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96 throw new IllegalStateException();
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97 }
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98
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99 /* ------------------------------------------------------------ */
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100 /**
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101 * Create a new content Buffer
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102 * @param size
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103 * @return new Buffer
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104 */
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105 final protected Buffer newBuffer(int size)
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106 {
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107 switch(_otherType)
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108 {
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109 case BYTE_ARRAY:
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110 return new ByteArrayBuffer(size);
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111 case DIRECT:
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112 return new DirectNIOBuffer(size);
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113 case INDIRECT:
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114 return new IndirectNIOBuffer(size);
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115 }
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116 throw new IllegalStateException();
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117 }
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118
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119 /* ------------------------------------------------------------ */
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120 /**
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121 * @param buffer
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122 * @return True if the buffer is the correct type to be a Header buffer
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123 */
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124 public final boolean isHeader(Buffer buffer)
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125 {
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126 if (buffer.capacity()==_headerSize)
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127 {
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128 switch(_headerType)
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129 {
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130 case BYTE_ARRAY:
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131 return buffer instanceof ByteArrayBuffer && !(buffer instanceof IndirectNIOBuffer);
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132 case DIRECT:
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133 return buffer instanceof DirectNIOBuffer;
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134 case INDIRECT:
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135 return buffer instanceof IndirectNIOBuffer;
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136 }
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137 }
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138 return false;
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139 }
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140
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141 /* ------------------------------------------------------------ */
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142 /**
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143 * @param buffer
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144 * @return True if the buffer is the correct type to be a Header buffer
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145 */
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146 public final boolean isBuffer(Buffer buffer)
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147 {
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148 if (buffer.capacity()==_bufferSize)
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149 {
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150 switch(_bufferType)
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151 {
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152 case BYTE_ARRAY:
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153 return buffer instanceof ByteArrayBuffer && !(buffer instanceof IndirectNIOBuffer);
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154 case DIRECT:
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155 return buffer instanceof DirectNIOBuffer;
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156 case INDIRECT:
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157 return buffer instanceof IndirectNIOBuffer;
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158 }
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159 }
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160 return false;
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161 }
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162
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163 /* ------------------------------------------------------------ */
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164 public String toString()
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165 {
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166 return String.format("%s [%d,%d]", getClass().getSimpleName(), _headerSize, _bufferSize);
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167 }
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168 }