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1046
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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.io.nio.NIOBuffer;
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13 import org.eclipse.jetty.util.TypeUtil;
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14
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15
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16 public final class JBuffer implements NIOBuffer {
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17 private static final Logger LOG = LoggerFactory.getLogger(JBuffer.class);
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18
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19 private final ByteBuffer bb;
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20
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21 public JBuffer(ByteBuffer bb) {
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22 this.bb = bb;
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23 }
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24
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25 @Override
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26 public byte[] array() {
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27 return bb.hasArray() ? bb.array() : null;
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28 }
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29
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30 @Override
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31 public Buffer duplicate() {
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32 return new JBuffer(bb.duplicate());
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33 }
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34
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35 @Override
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36 public int remaining() {
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37 return bb.remaining();
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38 }
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39
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40 @Override
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41 public boolean isReadOnly() {
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42 return bb.isReadOnly();
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43 }
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44
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45 @Override
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46 public boolean hasRemaining() {
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47 return bb.hasRemaining();
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48 }
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49
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50 @Override
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51 public byte get() {
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52 return bb.get();
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53 }
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54
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55 @Override
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56 public void compact() {
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57 int n = bb.remaining();
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58 bb.compact();
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59 bb.position(0);
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60 bb.limit(n);
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61 }
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62
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63 @Override
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64 public int capacity() {
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65 return bb.capacity();
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66 }
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67
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68 @Override
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69 public boolean isDirect() {
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70 return bb.isDirect();
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71 }
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72
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73
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74
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75 @Override
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76 public ByteBuffer getByteBuffer() {
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77 ByteBuffer dup = bb.duplicate();
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78 dup.limit(dup.capacity());
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79 return dup;
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80 }
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81
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82 @Override
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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 @Override
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88 public void clear() {
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89 bb.position(0);
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90 bb.limit(0);
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91 }
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92
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93 @Override
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94 public int space() {
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95 return bb.capacity() - bb.limit();
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96 }
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97
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98 @Override
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99 public Buffer buffer() {
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100 return this;
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101 }
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102
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103
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104 @Override
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105 public Buffer get(int length) {
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106 ByteBuffer dup = bb.duplicate();
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107 int end = bb.position()+length;
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108 dup.limit(end);
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109 bb.position(end);
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110 return new JBuffer(dup);
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111 }
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112
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113 @Override
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114 public int get(byte[] b, int offset, int length) {
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115 int remaining = bb.remaining();
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116 if( remaining == 0 )
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117 return -1;
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118 if( length > remaining )
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119 length = remaining;
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120 bb.get(b,offset,length);
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121 return length;
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122 }
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123
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124
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125 @Override
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126 public int put(Buffer src) {
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127 return put(src.asArray());
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128 }
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129
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130 @Override
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131 public void put(byte b)
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132 {
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133 ByteBuffer dup = bb.duplicate();
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134 dup.position(bb.limit());
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135 dup.limit(bb.capacity());
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136 dup.put(b);
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137 bb.limit(bb.limit()+1);
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138 }
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139
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140 @Override
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141 public int put(byte[] b, int offset, int length) {
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142 ByteBuffer dup = bb.duplicate();
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143 int put = bb.limit();
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144 int capacity = bb.capacity();
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145 dup.position(put);
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146 dup.limit(capacity);
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147 if( length > capacity - put )
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148 length = capacity - put;
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149 dup.put(b,offset,length);
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150 bb.limit(put+length);
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151 return length;
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152 }
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153
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154 @Override
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155 public int put(byte[] b) {
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156 return put(b,0,b.length);
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157 }
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158
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159 @Override
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160 public final int putIndex() {
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161 return bb.limit();
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162 }
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163
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164 @Override
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165 public void setGetIndex(int getIndex) {
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166 bb.position(getIndex);
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167 }
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168
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169 @Override
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170 public void setPutIndex(int putIndex) {
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171 bb.limit(putIndex);
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172 }
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173
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174 @Override
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175 public int skip(int n) {
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176 if (remaining() < n) n = remaining();
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177 bb.position(bb.position() + n);
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178 return n;
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179 }
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180
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181 @Override
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182 public Buffer slice() {
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183 return duplicate();
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184 }
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185
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186 @Override
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187 public final Buffer sliceFrom(int index) {
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188 ByteBuffer dup = bb.duplicate();
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189 dup.position(index);
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190 dup.limit(bb.position()-1);
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191 return new JBuffer(dup);
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192 }
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193
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194 @Override
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195 public int readFrom(InputStream in,int max) throws IOException {
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196 ByteBuffer dup = bb.duplicate();
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197 int put = bb.limit();
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198 dup.limit( Math.min(put+max,bb.capacity()) );
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199 dup.position(put);
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200
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201 ReadableByteChannel chan = Channels.newChannel(in);
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202 int n = chan.read(dup);
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203
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204 if( n > 0 )
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205 bb.limit(put+n);
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206 return n;
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207 }
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208
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209 public final byte[] asArray() {
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210 byte[] bytes = new byte[remaining()];
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211 bb.duplicate().get(bytes);
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212 return bytes;
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213 }
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214
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215 @Override
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216 public String toString()
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217 {
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218 return toString("ISO-8859-1");
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219 }
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220
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221 @Override
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222 public final String toString(int index, int length) {
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223 ByteBuffer dup = bb.duplicate();
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224 dup.limit(index+length);
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225 dup.position(index);
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226 return new JBuffer(dup).toString();
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227 }
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228
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229 @Override
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230 public final String toString(String charset)
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231 {
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232 byte[] bytes = asArray();
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233 try
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234 {
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235 return new String(bytes,charset);
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236 }
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237 catch(Exception e)
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238 {
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239 LOG.warn("",e);
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240 return new String(bytes);
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241 }
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242 }
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243
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244 @Override
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245 public String toDetailString()
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246 {
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247 StringBuilder buf = new StringBuilder();
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248 buf.append("[");
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249 buf.append(super.hashCode());
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250 buf.append(",");
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251 buf.append(this.buffer().hashCode());
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252 buf.append(",g=");
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253 buf.append(getIndex());
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254 buf.append(",p=");
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255 buf.append(putIndex());
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256 buf.append(",c=");
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257 buf.append(capacity());
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258 buf.append("]={");
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259 int count = 0;
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260 for (int i = getIndex(); i < putIndex(); i++)
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261 {
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262 byte b = peek(i);
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263 TypeUtil.toHex(b,buf);
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264 if (count++ == 50)
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265 {
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266 if (putIndex() - i > 20)
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267 {
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268 buf.append(" ... ");
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269 i = putIndex() - 20;
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270 }
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271 }
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272 }
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273 buf.append('}');
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274 return buf.toString();
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275 }
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276
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277
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278
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279 private Buffer pokeBuffer(int index) {
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280 Buffer dup = duplicate();
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281 dup.setPutIndex(index);
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282 return dup;
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283 }
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284
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285 @Override
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286 public int poke(int index, byte b[], int offset, int length) {
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287 return pokeBuffer(index).put(b,offset,length);
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288 }
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289
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290 @Override
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291 public void poke(int index, byte b) {
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292 pokeBuffer(index).put(b);
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293 }
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294
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295 @Override
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296 public int poke(int index, Buffer src) {
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297 return pokeBuffer(index).put(src);
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298 }
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299
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300 private Buffer peekBuffer(int index) {
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301 Buffer dup = duplicate();
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302 dup.setGetIndex(index);
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303 dup.setPutIndex(dup.capacity());
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304 return dup;
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305 }
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306
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307 @Override
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308 public int peek(int index, byte[] b, int offset, int length) {
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309 return peekBuffer(index).get(b,offset,length);
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310 }
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311
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312 @Override
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313 public byte peek(int index) {
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314 return bb.get(index);
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315 }
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316
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317 @Override
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318 public byte peek() {
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319 return peek(bb.position());
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320 }
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321
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322 }
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