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annotate src/org/eclipse/jetty/io/ByteArrayBuffer.java @ 1019:f126d30e04a4
start replacing BufferCache with StringCache
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Mon, 31 Oct 2016 03:33:42 -0600 |
| parents | 4dc1e1a18661 |
| children | 6647dbc8be71 |
| 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 |
| 1010 | 36 protected ByteArrayBuffer(int size, int access, boolean isVolatile) |
| 37 { | |
| 38 this(new byte[size],0,0,access, isVolatile); | |
| 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 { | |
| 53 super(READWRITE, NON_VOLATILE); | |
| 54 _bytes = bytes; | |
| 55 setPutIndex(index + length); | |
| 56 setGetIndex(index); | |
| 57 _access = access; | |
| 58 } | |
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59 |
| 1010 | 60 public ByteArrayBuffer(byte[] bytes, int index, int length, int access, boolean isVolatile) |
| 61 { | |
| 62 super(READWRITE, isVolatile); | |
| 63 _bytes = bytes; | |
| 64 setPutIndex(index + length); | |
| 65 setGetIndex(index); | |
| 66 _access = access; | |
| 67 } | |
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68 |
| 1010 | 69 public ByteArrayBuffer(int size) |
| 70 { | |
| 71 this(new byte[size], 0, 0, READWRITE); | |
| 72 setPutIndex(0); | |
| 73 } | |
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74 |
| 1010 | 75 public ByteArrayBuffer(String value) |
| 76 { | |
| 77 super(READWRITE,NON_VOLATILE); | |
| 78 _bytes = StringUtil.getBytes(value); | |
| 79 setGetIndex(0); | |
| 80 setPutIndex(_bytes.length); | |
| 81 _access=IMMUTABLE; | |
| 82 _string = value; | |
| 83 } | |
| 84 | |
| 85 public ByteArrayBuffer(String value,boolean immutable) | |
| 86 { | |
| 87 super(READWRITE,NON_VOLATILE); | |
| 88 _bytes = StringUtil.getBytes(value); | |
| 89 setGetIndex(0); | |
| 90 setPutIndex(_bytes.length); | |
| 91 if (immutable) | |
| 92 { | |
| 93 _access=IMMUTABLE; | |
| 94 _string = value; | |
| 95 } | |
| 96 } | |
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97 |
| 1010 | 98 public ByteArrayBuffer(String value,String encoding) throws UnsupportedEncodingException |
| 99 { | |
| 100 super(READWRITE,NON_VOLATILE); | |
| 101 _bytes = value.getBytes(encoding); | |
| 102 setGetIndex(0); | |
| 103 setPutIndex(_bytes.length); | |
| 104 _access=IMMUTABLE; | |
| 105 _string = value; | |
| 106 } | |
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107 |
| 1010 | 108 public byte[] array() |
| 109 { | |
| 110 return _bytes; | |
| 111 } | |
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112 |
| 1010 | 113 public int capacity() |
| 114 { | |
| 115 return _bytes.length; | |
| 116 } | |
| 117 | |
| 118 @Override | |
| 119 public void compact() | |
| 120 { | |
| 121 if (isReadOnly()) | |
| 122 throw new IllegalStateException(__READONLY); | |
| 123 int s = markIndex() >= 0 ? markIndex() : getIndex(); | |
| 124 if (s > 0) | |
| 125 { | |
| 126 int length = putIndex() - s; | |
| 127 if (length > 0) | |
| 128 { | |
| 129 System.arraycopy(_bytes, s,_bytes, 0, length); | |
| 130 } | |
| 131 if (markIndex() > 0) setMarkIndex(markIndex() - s); | |
| 132 setGetIndex(getIndex() - s); | |
| 133 setPutIndex(putIndex() - s); | |
| 134 } | |
| 135 } | |
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136 |
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137 |
| 1010 | 138 @Override |
| 139 public boolean equals(Object obj) | |
| 140 { | |
| 141 if (obj==this) | |
| 142 return true; | |
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143 |
| 1010 | 144 if (obj == null || !(obj instanceof Buffer)) |
| 145 return false; | |
| 146 | |
| 147 if (obj instanceof Buffer.CaseInsensitve) | |
| 148 return equalsIgnoreCase((Buffer)obj); | |
| 149 | |
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150 |
| 1010 | 151 Buffer b = (Buffer) obj; |
| 152 | |
| 153 // reject different lengths | |
| 154 if (b.length() != length()) | |
| 155 return false; | |
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156 |
| 1010 | 157 // reject AbstractBuffer with different hash value |
| 158 if (_hash != 0 && obj instanceof AbstractBuffer) | |
| 159 { | |
| 160 AbstractBuffer ab = (AbstractBuffer) obj; | |
| 161 if (ab._hash != 0 && _hash != ab._hash) | |
| 162 return false; | |
| 163 } | |
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164 |
| 1010 | 165 // Nothing for it but to do the hard grind. |
| 166 int get=getIndex(); | |
| 167 int bi=b.putIndex(); | |
| 168 for (int i = putIndex(); i-->get;) | |
| 169 { | |
| 170 byte b1 = _bytes[i]; | |
| 171 byte b2 = b.peek(--bi); | |
| 172 if (b1 != b2) return false; | |
| 173 } | |
| 174 return true; | |
| 175 } | |
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176 |
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177 |
| 1010 | 178 @Override |
| 179 public boolean equalsIgnoreCase(Buffer b) | |
| 180 { | |
| 181 if (b==this) | |
| 182 return true; | |
| 183 | |
| 184 // reject different lengths | |
| 185 if (b==null || b.length() != length()) | |
| 186 return false; | |
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187 |
| 1010 | 188 // reject AbstractBuffer with different hash value |
| 189 if (_hash != 0 && b instanceof AbstractBuffer) | |
| 190 { | |
| 191 AbstractBuffer ab = (AbstractBuffer) b; | |
| 192 if (ab._hash != 0 && _hash != ab._hash) return false; | |
| 193 } | |
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194 |
| 1010 | 195 // Nothing for it but to do the hard grind. |
| 196 int get=getIndex(); | |
| 197 int bi=b.putIndex(); | |
| 198 byte[] barray=b.array(); | |
| 199 if (barray==null) | |
| 200 { | |
| 201 for (int i = putIndex(); i-->get;) | |
| 202 { | |
| 203 byte b1 = _bytes[i]; | |
| 204 byte b2 = b.peek(--bi); | |
| 205 if (b1 != b2) | |
| 206 { | |
| 207 if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A'); | |
| 208 if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A'); | |
| 209 if (b1 != b2) return false; | |
| 210 } | |
| 211 } | |
| 212 } | |
| 213 else | |
| 214 { | |
| 215 for (int i = putIndex(); i-->get;) | |
| 216 { | |
| 217 byte b1 = _bytes[i]; | |
| 218 byte b2 = barray[--bi]; | |
| 219 if (b1 != b2) | |
| 220 { | |
| 221 if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A'); | |
| 222 if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A'); | |
| 223 if (b1 != b2) return false; | |
| 224 } | |
| 225 } | |
| 226 } | |
| 227 return true; | |
| 228 } | |
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229 |
| 1010 | 230 @Override |
| 231 public byte get() | |
| 232 { | |
| 233 return _bytes[_get++]; | |
| 234 } | |
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235 |
| 1010 | 236 @Override |
| 237 public int hashCode() | |
| 238 { | |
| 239 if (_hash == 0 || _hashGet!=_get || _hashPut!=_put) | |
| 240 { | |
| 241 int get=getIndex(); | |
| 242 for (int i = putIndex(); i-- >get;) | |
| 243 { | |
| 244 byte b = _bytes[i]; | |
| 245 if ('a' <= b && b <= 'z') | |
| 246 b = (byte) (b - 'a' + 'A'); | |
| 247 _hash = 31 * _hash + b; | |
| 248 } | |
| 249 if (_hash == 0) | |
| 250 _hash = -1; | |
| 251 _hashGet=_get; | |
| 252 _hashPut=_put; | |
| 253 } | |
| 254 return _hash; | |
| 255 } | |
| 256 | |
| 257 | |
| 258 public byte peek(int index) | |
| 259 { | |
| 260 return _bytes[index]; | |
| 261 } | |
| 262 | |
| 263 public int peek(int index, byte[] b, int offset, int length) | |
| 264 { | |
| 265 int l = length; | |
| 266 if (index + l > capacity()) | |
| 267 { | |
| 268 l = capacity() - index; | |
| 269 if (l==0) | |
| 270 return -1; | |
| 271 } | |
| 272 | |
| 273 if (l < 0) | |
| 274 return -1; | |
| 275 | |
| 276 System.arraycopy(_bytes, index, b, offset, l); | |
| 277 return l; | |
| 278 } | |
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279 |
| 1010 | 280 public void poke(int index, byte b) |
| 281 { | |
| 282 /* | |
| 283 if (isReadOnly()) | |
| 284 throw new IllegalStateException(__READONLY); | |
| 285 | |
| 286 if (index < 0) | |
| 287 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 288 if (index > capacity()) | |
| 289 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 290 */ | |
| 291 _bytes[index] = b; | |
| 292 } | |
| 293 | |
| 294 @Override | |
| 295 public int poke(int index, Buffer src) | |
| 296 { | |
| 297 _hash=0; | |
| 298 | |
| 299 /* | |
| 300 if (isReadOnly()) | |
| 301 throw new IllegalStateException(__READONLY); | |
| 302 if (index < 0) | |
| 303 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 304 */ | |
| 305 | |
| 306 int length=src.length(); | |
| 307 if (index + length > capacity()) | |
| 308 { | |
| 309 length=capacity()-index; | |
| 310 /* | |
| 311 if (length<0) | |
| 312 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 313 */ | |
| 314 } | |
| 315 | |
| 316 byte[] src_array = src.array(); | |
| 317 if (src_array != null) | |
| 318 System.arraycopy(src_array, src.getIndex(), _bytes, index, length); | |
| 319 else | |
| 320 { | |
| 321 int s=src.getIndex(); | |
| 322 for (int i=0;i<length;i++) | |
| 323 _bytes[index++]=src.peek(s++); | |
| 324 } | |
| 325 | |
| 326 return length; | |
| 327 } | |
| 328 | |
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329 |
| 1010 | 330 @Override |
| 331 public int poke(int index, byte[] b, int offset, int length) | |
| 332 { | |
| 333 _hash=0; | |
| 334 /* | |
| 335 if (isReadOnly()) | |
| 336 throw new IllegalStateException(__READONLY); | |
| 337 if (index < 0) | |
| 338 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 339 */ | |
| 340 | |
| 341 if (index + length > capacity()) | |
| 342 { | |
| 343 length=capacity()-index; | |
| 344 /* if (length<0) | |
| 345 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 346 */ | |
| 347 } | |
| 348 | |
| 349 System.arraycopy(b, offset, _bytes, index, length); | |
| 350 | |
| 351 return length; | |
| 352 } | |
| 353 | |
| 354 @Override | |
| 355 public int readFrom(InputStream in,int max) throws IOException | |
| 356 { | |
| 357 if (max<0||max>space()) | |
| 358 max=space(); | |
| 359 int p = putIndex(); | |
| 360 | |
| 361 int len=0, total=0, available=max; | |
| 362 while (total<max) | |
| 363 { | |
| 364 len=in.read(_bytes,p,available); | |
| 365 if (len<0) | |
| 366 break; | |
| 367 else if (len>0) | |
| 368 { | |
| 369 p += len; | |
| 370 total += len; | |
| 371 available -= len; | |
| 372 setPutIndex(p); | |
| 373 } | |
| 374 if (in.available()<=0) | |
| 375 break; | |
| 376 } | |
| 377 if (len<0 && total==0) | |
| 378 return -1; | |
| 379 return total; | |
| 380 } | |
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381 |
| 1010 | 382 @Override |
| 383 public int space() | |
| 384 { | |
| 385 return _bytes.length - _put; | |
| 386 } | |
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387 |
| 1010 | 388 |
| 389 public static class CaseInsensitive extends ByteArrayBuffer implements Buffer.CaseInsensitve | |
| 390 { | |
| 391 public CaseInsensitive(String s) | |
| 392 { | |
| 393 super(s); | |
| 394 } | |
| 395 | |
| 396 public CaseInsensitive(byte[] b, int o, int l, int rw) | |
| 397 { | |
| 398 super(b,o,l,rw); | |
| 399 } | |
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400 |
| 1010 | 401 @Override |
| 402 public boolean equals(Object obj) | |
| 403 { | |
| 404 return obj instanceof Buffer && equalsIgnoreCase((Buffer)obj); | |
| 405 } | |
| 406 | |
| 407 } | |
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408 } |