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annotate src/org/eclipse/jetty/io/ByteArrayBuffer.java @ 1010:2712133d5bce
simplify Buffer code
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Sun, 23 Oct 2016 22:23:50 -0600 |
| parents | 3428c60d7cfc |
| children | 4dc1e1a18661 |
| 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 |
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28 /* ------------------------------------------------------------------------------- */ |
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29 /** |
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30 * |
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31 */ |
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32 public class ByteArrayBuffer extends AbstractBuffer |
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33 { |
| 1010 | 34 // Set a maximum size to a write for the writeTo method, to ensure that very large content is not |
| 35 // written as a single write (which may fall foul to write timeouts if consumed slowly). | |
| 36 final static int MAX_WRITE=Integer.getInteger("org.eclipse.jetty.io.ByteArrayBuffer.MAX_WRITE",128*1024); | |
| 37 final protected byte[] _bytes; | |
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38 |
| 1010 | 39 protected ByteArrayBuffer(int size, int access, boolean isVolatile) |
| 40 { | |
| 41 this(new byte[size],0,0,access, isVolatile); | |
| 42 } | |
| 43 | |
| 44 public ByteArrayBuffer(byte[] bytes) | |
| 45 { | |
| 46 this(bytes, 0, bytes.length, READWRITE); | |
| 47 } | |
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48 |
| 1010 | 49 public ByteArrayBuffer(byte[] bytes, int index, int length) |
| 50 { | |
| 51 this(bytes, index, length, READWRITE); | |
| 52 } | |
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53 |
| 1010 | 54 public ByteArrayBuffer(byte[] bytes, int index, int length, int access) |
| 55 { | |
| 56 super(READWRITE, NON_VOLATILE); | |
| 57 _bytes = bytes; | |
| 58 setPutIndex(index + length); | |
| 59 setGetIndex(index); | |
| 60 _access = access; | |
| 61 } | |
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62 |
| 1010 | 63 public ByteArrayBuffer(byte[] bytes, int index, int length, int access, boolean isVolatile) |
| 64 { | |
| 65 super(READWRITE, isVolatile); | |
| 66 _bytes = bytes; | |
| 67 setPutIndex(index + length); | |
| 68 setGetIndex(index); | |
| 69 _access = access; | |
| 70 } | |
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71 |
| 1010 | 72 public ByteArrayBuffer(int size) |
| 73 { | |
| 74 this(new byte[size], 0, 0, READWRITE); | |
| 75 setPutIndex(0); | |
| 76 } | |
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77 |
| 1010 | 78 public ByteArrayBuffer(String value) |
| 79 { | |
| 80 super(READWRITE,NON_VOLATILE); | |
| 81 _bytes = StringUtil.getBytes(value); | |
| 82 setGetIndex(0); | |
| 83 setPutIndex(_bytes.length); | |
| 84 _access=IMMUTABLE; | |
| 85 _string = value; | |
| 86 } | |
| 87 | |
| 88 public ByteArrayBuffer(String value,boolean immutable) | |
| 89 { | |
| 90 super(READWRITE,NON_VOLATILE); | |
| 91 _bytes = StringUtil.getBytes(value); | |
| 92 setGetIndex(0); | |
| 93 setPutIndex(_bytes.length); | |
| 94 if (immutable) | |
| 95 { | |
| 96 _access=IMMUTABLE; | |
| 97 _string = value; | |
| 98 } | |
| 99 } | |
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100 |
| 1010 | 101 public ByteArrayBuffer(String value,String encoding) throws UnsupportedEncodingException |
| 102 { | |
| 103 super(READWRITE,NON_VOLATILE); | |
| 104 _bytes = value.getBytes(encoding); | |
| 105 setGetIndex(0); | |
| 106 setPutIndex(_bytes.length); | |
| 107 _access=IMMUTABLE; | |
| 108 _string = value; | |
| 109 } | |
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110 |
| 1010 | 111 public byte[] array() |
| 112 { | |
| 113 return _bytes; | |
| 114 } | |
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115 |
| 1010 | 116 public int capacity() |
| 117 { | |
| 118 return _bytes.length; | |
| 119 } | |
| 120 | |
| 121 @Override | |
| 122 public void compact() | |
| 123 { | |
| 124 if (isReadOnly()) | |
| 125 throw new IllegalStateException(__READONLY); | |
| 126 int s = markIndex() >= 0 ? markIndex() : getIndex(); | |
| 127 if (s > 0) | |
| 128 { | |
| 129 int length = putIndex() - s; | |
| 130 if (length > 0) | |
| 131 { | |
| 132 System.arraycopy(_bytes, s,_bytes, 0, length); | |
| 133 } | |
| 134 if (markIndex() > 0) setMarkIndex(markIndex() - s); | |
| 135 setGetIndex(getIndex() - s); | |
| 136 setPutIndex(putIndex() - s); | |
| 137 } | |
| 138 } | |
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139 |
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140 |
| 1010 | 141 @Override |
| 142 public boolean equals(Object obj) | |
| 143 { | |
| 144 if (obj==this) | |
| 145 return true; | |
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146 |
| 1010 | 147 if (obj == null || !(obj instanceof Buffer)) |
| 148 return false; | |
| 149 | |
| 150 if (obj instanceof Buffer.CaseInsensitve) | |
| 151 return equalsIgnoreCase((Buffer)obj); | |
| 152 | |
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153 |
| 1010 | 154 Buffer b = (Buffer) obj; |
| 155 | |
| 156 // reject different lengths | |
| 157 if (b.length() != length()) | |
| 158 return false; | |
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159 |
| 1010 | 160 // reject AbstractBuffer with different hash value |
| 161 if (_hash != 0 && obj instanceof AbstractBuffer) | |
| 162 { | |
| 163 AbstractBuffer ab = (AbstractBuffer) obj; | |
| 164 if (ab._hash != 0 && _hash != ab._hash) | |
| 165 return false; | |
| 166 } | |
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167 |
| 1010 | 168 // Nothing for it but to do the hard grind. |
| 169 int get=getIndex(); | |
| 170 int bi=b.putIndex(); | |
| 171 for (int i = putIndex(); i-->get;) | |
| 172 { | |
| 173 byte b1 = _bytes[i]; | |
| 174 byte b2 = b.peek(--bi); | |
| 175 if (b1 != b2) return false; | |
| 176 } | |
| 177 return true; | |
| 178 } | |
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179 |
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180 |
| 1010 | 181 @Override |
| 182 public boolean equalsIgnoreCase(Buffer b) | |
| 183 { | |
| 184 if (b==this) | |
| 185 return true; | |
| 186 | |
| 187 // reject different lengths | |
| 188 if (b==null || b.length() != length()) | |
| 189 return false; | |
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190 |
| 1010 | 191 // reject AbstractBuffer with different hash value |
| 192 if (_hash != 0 && b instanceof AbstractBuffer) | |
| 193 { | |
| 194 AbstractBuffer ab = (AbstractBuffer) b; | |
| 195 if (ab._hash != 0 && _hash != ab._hash) return false; | |
| 196 } | |
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197 |
| 1010 | 198 // Nothing for it but to do the hard grind. |
| 199 int get=getIndex(); | |
| 200 int bi=b.putIndex(); | |
| 201 byte[] barray=b.array(); | |
| 202 if (barray==null) | |
| 203 { | |
| 204 for (int i = putIndex(); i-->get;) | |
| 205 { | |
| 206 byte b1 = _bytes[i]; | |
| 207 byte b2 = b.peek(--bi); | |
| 208 if (b1 != b2) | |
| 209 { | |
| 210 if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A'); | |
| 211 if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A'); | |
| 212 if (b1 != b2) return false; | |
| 213 } | |
| 214 } | |
| 215 } | |
| 216 else | |
| 217 { | |
| 218 for (int i = putIndex(); i-->get;) | |
| 219 { | |
| 220 byte b1 = _bytes[i]; | |
| 221 byte b2 = barray[--bi]; | |
| 222 if (b1 != b2) | |
| 223 { | |
| 224 if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A'); | |
| 225 if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A'); | |
| 226 if (b1 != b2) return false; | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 return true; | |
| 231 } | |
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232 |
| 1010 | 233 @Override |
| 234 public byte get() | |
| 235 { | |
| 236 return _bytes[_get++]; | |
| 237 } | |
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238 |
| 1010 | 239 @Override |
| 240 public int hashCode() | |
| 241 { | |
| 242 if (_hash == 0 || _hashGet!=_get || _hashPut!=_put) | |
| 243 { | |
| 244 int get=getIndex(); | |
| 245 for (int i = putIndex(); i-- >get;) | |
| 246 { | |
| 247 byte b = _bytes[i]; | |
| 248 if ('a' <= b && b <= 'z') | |
| 249 b = (byte) (b - 'a' + 'A'); | |
| 250 _hash = 31 * _hash + b; | |
| 251 } | |
| 252 if (_hash == 0) | |
| 253 _hash = -1; | |
| 254 _hashGet=_get; | |
| 255 _hashPut=_put; | |
| 256 } | |
| 257 return _hash; | |
| 258 } | |
| 259 | |
| 260 | |
| 261 public byte peek(int index) | |
| 262 { | |
| 263 return _bytes[index]; | |
| 264 } | |
| 265 | |
| 266 public int peek(int index, byte[] b, int offset, int length) | |
| 267 { | |
| 268 int l = length; | |
| 269 if (index + l > capacity()) | |
| 270 { | |
| 271 l = capacity() - index; | |
| 272 if (l==0) | |
| 273 return -1; | |
| 274 } | |
| 275 | |
| 276 if (l < 0) | |
| 277 return -1; | |
| 278 | |
| 279 System.arraycopy(_bytes, index, b, offset, l); | |
| 280 return l; | |
| 281 } | |
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282 |
| 1010 | 283 public void poke(int index, byte b) |
| 284 { | |
| 285 /* | |
| 286 if (isReadOnly()) | |
| 287 throw new IllegalStateException(__READONLY); | |
| 288 | |
| 289 if (index < 0) | |
| 290 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 291 if (index > capacity()) | |
| 292 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 293 */ | |
| 294 _bytes[index] = b; | |
| 295 } | |
| 296 | |
| 297 @Override | |
| 298 public int poke(int index, Buffer src) | |
| 299 { | |
| 300 _hash=0; | |
| 301 | |
| 302 /* | |
| 303 if (isReadOnly()) | |
| 304 throw new IllegalStateException(__READONLY); | |
| 305 if (index < 0) | |
| 306 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 307 */ | |
| 308 | |
| 309 int length=src.length(); | |
| 310 if (index + length > capacity()) | |
| 311 { | |
| 312 length=capacity()-index; | |
| 313 /* | |
| 314 if (length<0) | |
| 315 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 316 */ | |
| 317 } | |
| 318 | |
| 319 byte[] src_array = src.array(); | |
| 320 if (src_array != null) | |
| 321 System.arraycopy(src_array, src.getIndex(), _bytes, index, length); | |
| 322 else | |
| 323 { | |
| 324 int s=src.getIndex(); | |
| 325 for (int i=0;i<length;i++) | |
| 326 _bytes[index++]=src.peek(s++); | |
| 327 } | |
| 328 | |
| 329 return length; | |
| 330 } | |
| 331 | |
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332 |
| 1010 | 333 @Override |
| 334 public int poke(int index, byte[] b, int offset, int length) | |
| 335 { | |
| 336 _hash=0; | |
| 337 /* | |
| 338 if (isReadOnly()) | |
| 339 throw new IllegalStateException(__READONLY); | |
| 340 if (index < 0) | |
| 341 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 342 */ | |
| 343 | |
| 344 if (index + length > capacity()) | |
| 345 { | |
| 346 length=capacity()-index; | |
| 347 /* if (length<0) | |
| 348 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 349 */ | |
| 350 } | |
| 351 | |
| 352 System.arraycopy(b, offset, _bytes, index, length); | |
| 353 | |
| 354 return length; | |
| 355 } | |
| 356 | |
| 357 @Override | |
| 358 public int readFrom(InputStream in,int max) throws IOException | |
| 359 { | |
| 360 if (max<0||max>space()) | |
| 361 max=space(); | |
| 362 int p = putIndex(); | |
| 363 | |
| 364 int len=0, total=0, available=max; | |
| 365 while (total<max) | |
| 366 { | |
| 367 len=in.read(_bytes,p,available); | |
| 368 if (len<0) | |
| 369 break; | |
| 370 else if (len>0) | |
| 371 { | |
| 372 p += len; | |
| 373 total += len; | |
| 374 available -= len; | |
| 375 setPutIndex(p); | |
| 376 } | |
| 377 if (in.available()<=0) | |
| 378 break; | |
| 379 } | |
| 380 if (len<0 && total==0) | |
| 381 return -1; | |
| 382 return total; | |
| 383 } | |
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384 |
| 1010 | 385 /* ------------------------------------------------------------ */ |
| 386 @Override | |
| 387 public int space() | |
| 388 { | |
| 389 return _bytes.length - _put; | |
| 390 } | |
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391 |
| 1010 | 392 |
| 393 /* ------------------------------------------------------------ */ | |
| 394 /* ------------------------------------------------------------ */ | |
| 395 /* ------------------------------------------------------------ */ | |
| 396 public static class CaseInsensitive extends ByteArrayBuffer implements Buffer.CaseInsensitve | |
| 397 { | |
| 398 public CaseInsensitive(String s) | |
| 399 { | |
| 400 super(s); | |
| 401 } | |
| 402 | |
| 403 public CaseInsensitive(byte[] b, int o, int l, int rw) | |
| 404 { | |
| 405 super(b,o,l,rw); | |
| 406 } | |
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407 |
| 1010 | 408 @Override |
| 409 public boolean equals(Object obj) | |
| 410 { | |
| 411 return obj instanceof Buffer && equalsIgnoreCase((Buffer)obj); | |
| 412 } | |
| 413 | |
| 414 } | |
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415 } |