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annotate src/org/eclipse/jetty/io/ByteArrayBuffer.java @ 1046:a8c92b0a08ed
add JBuffer
| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Mon, 07 Nov 2016 22:39:39 -0700 |
| parents | dd71a59fcf72 |
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| rev | line source |
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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 java.io.IOException; |
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22 import java.io.InputStream; |
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23 import java.io.OutputStream; |
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24 import java.io.UnsupportedEncodingException; |
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25 |
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26 import org.eclipse.jetty.util.StringUtil; |
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27 |
| 1018 | 28 |
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29 public class ByteArrayBuffer extends AbstractBuffer |
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30 { |
| 1010 | 31 // Set a maximum size to a write for the writeTo method, to ensure that very large content is not |
| 32 // written as a single write (which may fall foul to write timeouts if consumed slowly). | |
| 33 final static int MAX_WRITE=Integer.getInteger("org.eclipse.jetty.io.ByteArrayBuffer.MAX_WRITE",128*1024); | |
| 34 final protected byte[] _bytes; | |
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35 |
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36 protected ByteArrayBuffer(int size, int access) |
| 1010 | 37 { |
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38 this(new byte[size],0,0,access); |
| 1010 | 39 } |
| 40 | |
| 41 public ByteArrayBuffer(byte[] bytes) | |
| 42 { | |
| 43 this(bytes, 0, bytes.length, READWRITE); | |
| 44 } | |
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45 |
| 1010 | 46 public ByteArrayBuffer(byte[] bytes, int index, int length) |
| 47 { | |
| 48 this(bytes, index, length, READWRITE); | |
| 49 } | |
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50 |
| 1010 | 51 public ByteArrayBuffer(byte[] bytes, int index, int length, int access) |
| 52 { | |
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53 super(access); |
| 1010 | 54 _bytes = bytes; |
| 55 setPutIndex(index + length); | |
| 56 setGetIndex(index); | |
| 57 } | |
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58 |
| 1010 | 59 public ByteArrayBuffer(int size) |
| 60 { | |
| 61 this(new byte[size], 0, 0, READWRITE); | |
| 62 setPutIndex(0); | |
| 63 } | |
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64 |
| 1010 | 65 public ByteArrayBuffer(String value) |
| 66 { | |
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67 super(READONLY); |
| 1010 | 68 _bytes = StringUtil.getBytes(value); |
| 69 setGetIndex(0); | |
| 70 setPutIndex(_bytes.length); | |
| 71 } | |
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72 |
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73 @Override |
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74 public final byte[] array() |
| 1010 | 75 { |
| 76 return _bytes; | |
| 77 } | |
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78 |
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79 @Override |
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80 public final int capacity() |
| 1010 | 81 { |
| 82 return _bytes.length; | |
| 83 } | |
| 84 | |
| 85 @Override | |
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86 public final void compact() |
| 1010 | 87 { |
| 88 if (isReadOnly()) | |
| 89 throw new IllegalStateException(__READONLY); | |
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90 int s = getIndex(); |
| 1010 | 91 if (s > 0) |
| 92 { | |
| 93 int length = putIndex() - s; | |
| 94 if (length > 0) | |
| 95 { | |
| 96 System.arraycopy(_bytes, s,_bytes, 0, length); | |
| 97 } | |
| 98 setGetIndex(getIndex() - s); | |
| 99 setPutIndex(putIndex() - s); | |
| 100 } | |
| 101 } | |
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102 |
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103 |
| 1010 | 104 @Override |
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105 public final boolean equals(Object obj) |
| 1010 | 106 { |
| 107 if (obj==this) | |
| 108 return true; | |
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109 |
| 1010 | 110 if (obj == null || !(obj instanceof Buffer)) |
| 111 return false; | |
| 112 | |
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113 |
| 1010 | 114 Buffer b = (Buffer) obj; |
| 115 | |
| 116 // reject different lengths | |
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117 if (b.remaining() != remaining()) |
| 1010 | 118 return false; |
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119 |
| 1010 | 120 // reject AbstractBuffer with different hash value |
| 121 if (_hash != 0 && obj instanceof AbstractBuffer) | |
| 122 { | |
| 123 AbstractBuffer ab = (AbstractBuffer) obj; | |
| 124 if (ab._hash != 0 && _hash != ab._hash) | |
| 125 return false; | |
| 126 } | |
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127 |
| 1010 | 128 // Nothing for it but to do the hard grind. |
| 129 int get=getIndex(); | |
| 130 int bi=b.putIndex(); | |
| 131 for (int i = putIndex(); i-->get;) | |
| 132 { | |
| 133 byte b1 = _bytes[i]; | |
| 134 byte b2 = b.peek(--bi); | |
| 135 if (b1 != b2) return false; | |
| 136 } | |
| 137 return true; | |
| 138 } | |
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139 |
| 1010 | 140 @Override |
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141 public final byte get() |
| 1010 | 142 { |
| 143 return _bytes[_get++]; | |
| 144 } | |
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145 |
| 1010 | 146 @Override |
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147 public final int hashCode() |
| 1010 | 148 { |
| 149 if (_hash == 0 || _hashGet!=_get || _hashPut!=_put) | |
| 150 { | |
| 151 int get=getIndex(); | |
| 152 for (int i = putIndex(); i-- >get;) | |
| 153 { | |
| 154 byte b = _bytes[i]; | |
| 155 if ('a' <= b && b <= 'z') | |
| 156 b = (byte) (b - 'a' + 'A'); | |
| 157 _hash = 31 * _hash + b; | |
| 158 } | |
| 159 if (_hash == 0) | |
| 160 _hash = -1; | |
| 161 _hashGet=_get; | |
| 162 _hashPut=_put; | |
| 163 } | |
| 164 return _hash; | |
| 165 } | |
| 166 | |
| 167 | |
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168 @Override |
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169 public final byte peek(int index) |
| 1010 | 170 { |
| 171 return _bytes[index]; | |
| 172 } | |
| 173 | |
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174 @Override |
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175 public final int peek(int index, byte[] b, int offset, int length) |
| 1010 | 176 { |
| 177 int l = length; | |
| 178 if (index + l > capacity()) | |
| 179 { | |
| 180 l = capacity() - index; | |
| 181 if (l==0) | |
| 182 return -1; | |
| 183 } | |
| 184 | |
| 185 if (l < 0) | |
| 186 return -1; | |
| 187 | |
| 188 System.arraycopy(_bytes, index, b, offset, l); | |
| 189 return l; | |
| 190 } | |
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191 |
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192 @Override |
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193 public final void poke(int index, byte b) |
| 1010 | 194 { |
| 195 /* | |
| 196 if (isReadOnly()) | |
| 197 throw new IllegalStateException(__READONLY); | |
| 198 | |
| 199 if (index < 0) | |
| 200 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 201 if (index > capacity()) | |
| 202 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 203 */ | |
| 204 _bytes[index] = b; | |
| 205 } | |
| 206 | |
| 207 @Override | |
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208 public final int poke(int index, Buffer src) |
| 1010 | 209 { |
| 210 _hash=0; | |
| 211 | |
| 212 /* | |
| 213 if (isReadOnly()) | |
| 214 throw new IllegalStateException(__READONLY); | |
| 215 if (index < 0) | |
| 216 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 217 */ | |
| 218 | |
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219 int length=src.remaining(); |
| 1010 | 220 if (index + length > capacity()) |
| 221 { | |
| 222 length=capacity()-index; | |
| 223 /* | |
| 224 if (length<0) | |
| 225 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 226 */ | |
| 227 } | |
| 228 | |
| 229 byte[] src_array = src.array(); | |
| 230 if (src_array != null) | |
| 231 System.arraycopy(src_array, src.getIndex(), _bytes, index, length); | |
| 232 else | |
| 233 { | |
| 234 int s=src.getIndex(); | |
| 235 for (int i=0;i<length;i++) | |
| 236 _bytes[index++]=src.peek(s++); | |
| 237 } | |
| 238 | |
| 239 return length; | |
| 240 } | |
| 241 | |
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242 |
| 1010 | 243 @Override |
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244 public final int poke(int index, byte[] b, int offset, int length) |
| 1010 | 245 { |
| 246 _hash=0; | |
| 247 /* | |
| 248 if (isReadOnly()) | |
| 249 throw new IllegalStateException(__READONLY); | |
| 250 if (index < 0) | |
| 251 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 252 */ | |
| 253 | |
| 254 if (index + length > capacity()) | |
| 255 { | |
| 256 length=capacity()-index; | |
| 257 /* if (length<0) | |
| 258 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 259 */ | |
| 260 } | |
| 261 | |
| 262 System.arraycopy(b, offset, _bytes, index, length); | |
| 263 | |
| 264 return length; | |
| 265 } | |
| 266 | |
| 267 @Override | |
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268 public final int readFrom(InputStream in,int max) throws IOException |
| 1010 | 269 { |
| 270 if (max<0||max>space()) | |
| 271 max=space(); | |
| 272 int p = putIndex(); | |
| 273 | |
| 274 int len=0, total=0, available=max; | |
| 275 while (total<max) | |
| 276 { | |
| 277 len=in.read(_bytes,p,available); | |
| 278 if (len<0) | |
| 279 break; | |
| 280 else if (len>0) | |
| 281 { | |
| 282 p += len; | |
| 283 total += len; | |
| 284 available -= len; | |
| 285 setPutIndex(p); | |
| 286 } | |
| 287 if (in.available()<=0) | |
| 288 break; | |
| 289 } | |
| 290 if (len<0 && total==0) | |
| 291 return -1; | |
| 292 return total; | |
| 293 } | |
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294 |
| 1010 | 295 @Override |
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296 public final int space() |
| 1010 | 297 { |
| 298 return _bytes.length - _put; | |
| 299 } | |
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300 |
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301 } |