annotate src/org/eclipse/jetty/io/JBuffer.java @ 1053:7e4b41247544

fix JBuffer.array()
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 08 Nov 2016 00:32:02 -0700
parents 4a2489f1d5fe
children 87275900646e
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1 // tmp class to implement Buffer until I can get rid of it
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2
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3 package org.eclipse.jetty.io;
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4
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5 import java.io.InputStream;
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6 import java.io.IOException;
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7 import java.nio.ByteBuffer;
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8 import java.nio.channels.Channels;
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9 import java.nio.channels.ReadableByteChannel;
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10 import org.slf4j.Logger;
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11 import org.slf4j.LoggerFactory;
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12 import org.eclipse.jetty.util.TypeUtil;
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13
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14
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15 public final class JBuffer {
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16 private static final Logger LOG = LoggerFactory.getLogger(JBuffer.class);
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17
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18 private final ByteBuffer bb;
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19
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20 public JBuffer(ByteBuffer bb) {
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21 this.bb = bb;
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22 }
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23
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24 public int position() {
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25 return bb.position();
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26 }
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27
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28 public void position(int i) {
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29 bb.position(i);
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30 }
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31
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32 public void limit(int i) {
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33 bb.limit(i);
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34 }
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35
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36 public byte[] array() {
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37 return bb.array();
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38 }
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39
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40 public boolean hasArray() {
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41 return bb.hasArray();
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42 }
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43
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44 public JBuffer duplicate() {
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45 return new JBuffer(bb.duplicate());
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46 }
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47
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48 public int remaining() {
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49 return bb.remaining();
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50 }
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51
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52 public boolean isReadOnly() {
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53 return bb.isReadOnly();
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54 }
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55
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56 public boolean hasRemaining() {
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57 return bb.hasRemaining();
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58 }
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59
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60 public byte get() {
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61 return bb.get();
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62 }
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63
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64 public void compact() {
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65 int n = bb.remaining();
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66 bb.compact();
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67 bb.position(0);
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68 bb.limit(n);
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69 }
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70
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71 public int capacity() {
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72 return bb.capacity();
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73 }
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74
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75
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76
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77 public ByteBuffer getByteBuffer() {
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78 ByteBuffer dup = bb.duplicate();
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79 dup.limit(dup.capacity());
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80 return dup;
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81 }
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82
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83 public int getIndex() {
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84 return bb.position();
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85 }
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86
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87 public void clear() {
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88 bb.position(0);
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89 bb.limit(0);
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90 }
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91
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92 public int space() {
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93 return bb.capacity() - bb.limit();
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94 }
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95
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96
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97 public int get(byte[] b, int offset, int length) {
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98 int remaining = bb.remaining();
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99 if( remaining == 0 )
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100 return -1;
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101 if( length > remaining )
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102 length = remaining;
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103 bb.get(b,offset,length);
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104 return length;
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105 }
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106
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107
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108 public int put(JBuffer src) {
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109 return put(src.asArray());
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110 }
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111
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112 public void put(byte b)
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113 {
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114 ByteBuffer dup = bb.duplicate();
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115 dup.position(bb.limit());
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116 dup.limit(bb.capacity());
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117 dup.put(b);
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118 bb.limit(bb.limit()+1);
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119 }
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120
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121 private int put(byte[] b, int offset, int length) {
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122 ByteBuffer dup = bb.duplicate();
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123 int put = bb.limit();
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124 int capacity = bb.capacity();
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125 dup.position(put);
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126 dup.limit(capacity);
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127 if( length > capacity - put )
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128 length = capacity - put;
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129 dup.put(b,offset,length);
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130 bb.limit(put+length);
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131 return length;
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132 }
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133
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134 public int put(byte[] b) {
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135 return put(b,0,b.length);
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136 }
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137
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138 public final int putIndex() {
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139 return bb.limit();
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140 }
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141
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142 public void setGetIndex(int getIndex) {
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143 bb.position(getIndex);
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144 }
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145
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146 public void setPutIndex(int putIndex) {
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147 bb.limit(putIndex);
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148 }
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149
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150 public void skip(int n) {
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151 if (remaining() < n) n = remaining();
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152 bb.position(bb.position() + n);
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153 }
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154
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155 public int readFrom(InputStream in,int max) throws IOException {
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156 ByteBuffer dup = bb.duplicate();
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157 int put = bb.limit();
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158 dup.limit( Math.min(put+max,bb.capacity()) );
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159 dup.position(put);
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160
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161 ReadableByteChannel chan = Channels.newChannel(in);
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162 int n = chan.read(dup);
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163
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164 if( n > 0 )
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165 bb.limit(put+n);
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166 return n;
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167 }
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168
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169 public final byte[] asArray() {
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170 byte[] bytes = new byte[remaining()];
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171 bb.duplicate().get(bytes);
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172 return bytes;
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173 }
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174
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175 @Override
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176 public String toString()
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177 {
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178 return toString("ISO-8859-1");
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179 }
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180
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181 public final String toString(int index, int length) {
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182 ByteBuffer dup = bb.duplicate();
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183 dup.limit(index+length);
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184 dup.position(index);
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185 return new JBuffer(dup).toString();
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186 }
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187
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188 private final String toString(String charset)
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189 {
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190 byte[] bytes = asArray();
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191 try
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192 {
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193 return new String(bytes,charset);
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194 }
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195 catch(Exception e)
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196 {
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197 LOG.warn("",e);
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198 return new String(bytes);
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199 }
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200 }
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201
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202
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203 private JBuffer pokeBuffer(int index) {
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204 JBuffer dup = duplicate();
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205 dup.setPutIndex(index);
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206 return dup;
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207 }
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208
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209 public int poke(int index, byte b[], int offset, int length) {
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210 return pokeBuffer(index).put(b,offset,length);
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211 }
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212
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213 public void poke(int index, byte b) {
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214 pokeBuffer(index).put(b);
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215 }
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216
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217
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218 public byte get(int index) {
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219 return bb.get(index);
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220 }
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221
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222 }