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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.util.TypeUtil;
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13
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14
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1048
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15 public final class JBuffer {
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1046
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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 byte[] array() {
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25 return bb.hasArray() ? bb.array() : null;
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26 }
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27
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28 public JBuffer duplicate() {
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29 return new JBuffer(bb.duplicate());
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30 }
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31
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32 public int remaining() {
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33 return bb.remaining();
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34 }
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35
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36 public boolean isReadOnly() {
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37 return bb.isReadOnly();
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38 }
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39
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40 public boolean hasRemaining() {
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41 return bb.hasRemaining();
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42 }
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43
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44 public byte get() {
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45 return bb.get();
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46 }
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47
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48 public void compact() {
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49 int n = bb.remaining();
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50 bb.compact();
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51 bb.position(0);
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52 bb.limit(n);
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53 }
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54
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55 public int capacity() {
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56 return bb.capacity();
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57 }
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58
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59 public boolean isDirect() {
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60 return bb.isDirect();
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61 }
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62
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63
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64
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65 public ByteBuffer getByteBuffer() {
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66 ByteBuffer dup = bb.duplicate();
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67 dup.limit(dup.capacity());
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68 return dup;
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69 }
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70
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71 public int getIndex() {
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72 return bb.position();
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73 }
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74
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75 public void clear() {
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76 bb.position(0);
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77 bb.limit(0);
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78 }
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79
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80 public int space() {
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81 return bb.capacity() - bb.limit();
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82 }
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83
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84 public JBuffer buffer() {
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85 return this;
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86 }
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87
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88
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89 public JBuffer get(int length) {
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90 ByteBuffer dup = bb.duplicate();
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91 int end = bb.position()+length;
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92 dup.limit(end);
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93 bb.position(end);
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94 return new JBuffer(dup);
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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 public 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 int 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 return n;
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154 }
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155
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156 public JBuffer slice() {
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1046
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157 return duplicate();
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158 }
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159
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160 public final JBuffer sliceFrom(int index) {
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161 ByteBuffer dup = bb.duplicate();
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162 dup.position(index);
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163 dup.limit(bb.position()-1);
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164 return new JBuffer(dup);
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165 }
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166
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167 public int readFrom(InputStream in,int max) throws IOException {
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168 ByteBuffer dup = bb.duplicate();
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169 int put = bb.limit();
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170 dup.limit( Math.min(put+max,bb.capacity()) );
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171 dup.position(put);
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172
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173 ReadableByteChannel chan = Channels.newChannel(in);
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174 int n = chan.read(dup);
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175
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176 if( n > 0 )
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177 bb.limit(put+n);
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178 return n;
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179 }
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180
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181 public final byte[] asArray() {
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182 byte[] bytes = new byte[remaining()];
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183 bb.duplicate().get(bytes);
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184 return bytes;
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185 }
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186
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187 @Override
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188 public String toString()
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189 {
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190 return toString("ISO-8859-1");
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191 }
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192
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193 public final String toString(int index, int length) {
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194 ByteBuffer dup = bb.duplicate();
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195 dup.limit(index+length);
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196 dup.position(index);
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197 return new JBuffer(dup).toString();
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198 }
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199
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200 public final String toString(String charset)
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201 {
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202 byte[] bytes = asArray();
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203 try
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204 {
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205 return new String(bytes,charset);
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206 }
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207 catch(Exception e)
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208 {
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209 LOG.warn("",e);
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210 return new String(bytes);
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211 }
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212 }
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213
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214 public String toDetailString()
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215 {
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216 StringBuilder buf = new StringBuilder();
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217 buf.append("[");
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218 buf.append(super.hashCode());
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219 buf.append(",");
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220 buf.append(this.buffer().hashCode());
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221 buf.append(",g=");
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222 buf.append(getIndex());
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223 buf.append(",p=");
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224 buf.append(putIndex());
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225 buf.append(",c=");
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226 buf.append(capacity());
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227 buf.append("]={");
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228 int count = 0;
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229 for (int i = getIndex(); i < putIndex(); i++)
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230 {
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231 byte b = peek(i);
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232 TypeUtil.toHex(b,buf);
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233 if (count++ == 50)
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234 {
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235 if (putIndex() - i > 20)
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236 {
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237 buf.append(" ... ");
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238 i = putIndex() - 20;
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239 }
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240 }
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241 }
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242 buf.append('}');
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243 return buf.toString();
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244 }
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245
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246
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247
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1048
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248 private JBuffer pokeBuffer(int index) {
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249 JBuffer dup = duplicate();
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250 dup.setPutIndex(index);
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251 return dup;
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252 }
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253
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254 public int poke(int index, byte b[], int offset, int length) {
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255 return pokeBuffer(index).put(b,offset,length);
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256 }
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257
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258 public void poke(int index, byte b) {
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259 pokeBuffer(index).put(b);
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260 }
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261
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1048
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262 public int poke(int index, JBuffer src) {
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263 return pokeBuffer(index).put(src);
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264 }
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265
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266 private JBuffer peekBuffer(int index) {
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267 JBuffer dup = duplicate();
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268 dup.setGetIndex(index);
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269 dup.setPutIndex(dup.capacity());
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270 return dup;
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271 }
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272
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273 public int peek(int index, byte[] b, int offset, int length) {
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274 return peekBuffer(index).get(b,offset,length);
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275 }
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276
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277 public byte peek(int index) {
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278 return bb.get(index);
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279 }
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280
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281 public byte peek() {
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282 return peek(bb.position());
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283 }
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284
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285 }
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