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annotate src/org/eclipse/jetty/io/AbstractBuffer.java @ 1030:80cad9086593
remove Buffer.isVolatile()
| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Thu, 03 Nov 2016 01:10:09 -0600 |
| parents | 4e5e9e3c25b3 |
| children | 921c25a05eaa |
| 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.nio.charset.Charset; |
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25 |
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26 import org.eclipse.jetty.util.TypeUtil; |
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27 import org.slf4j.Logger; |
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28 import org.slf4j.LoggerFactory; |
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29 |
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30 /** |
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31 * |
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32 * |
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33 */ |
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34 public abstract class AbstractBuffer implements Buffer |
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35 { |
| 1005 | 36 private static final Logger LOG = LoggerFactory.getLogger(AbstractBuffer.class); |
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37 |
| 1005 | 38 private final static boolean __boundsChecking = Boolean.getBoolean("org.eclipse.jetty.io.AbstractBuffer.boundsChecking"); |
| 39 | |
| 40 protected final static String | |
| 41 __IMMUTABLE = "IMMUTABLE", | |
| 42 __READONLY = "READONLY", | |
| 43 __READWRITE = "READWRITE", | |
| 44 __VOLATILE = "VOLATILE"; | |
| 45 | |
| 46 protected int _access; | |
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47 |
| 1005 | 48 protected int _get; |
| 49 protected int _put; | |
| 50 protected int _hash; | |
| 51 protected int _hashGet; | |
| 52 protected int _hashPut; | |
| 53 protected int _mark; | |
| 54 protected String _string; | |
| 55 protected View _view; | |
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56 |
| 1005 | 57 /** |
| 58 * Constructor for BufferView | |
| 59 * | |
| 60 * @param access 0==IMMUTABLE, 1==READONLY, 2==READWRITE | |
| 61 */ | |
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62 protected AbstractBuffer(int access) |
| 1005 | 63 { |
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64 // if (access == IMMUTABLE && isVolatile) |
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65 // throw new IllegalArgumentException("IMMUTABLE && VOLATILE"); |
| 1005 | 66 setMarkIndex(-1); |
| 67 _access = access; | |
| 68 } | |
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69 |
| 1005 | 70 /* |
| 71 * @see org.eclipse.io.Buffer#toArray() | |
| 72 */ | |
| 73 public byte[] asArray() | |
| 74 { | |
| 75 byte[] bytes = new byte[length()]; | |
| 76 byte[] array = array(); | |
| 77 if (array != null) | |
| 78 System.arraycopy(array, getIndex(), bytes, 0, bytes.length); | |
| 79 else | |
| 80 peek(getIndex(), bytes, 0, length()); | |
| 81 return bytes; | |
| 82 } | |
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83 |
| 1005 | 84 private ByteArrayBuffer duplicate(int access) |
| 85 { | |
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86 return new ByteArrayBuffer(asArray(), 0, length(), access); |
| 1005 | 87 } |
| 88 | |
| 89 /* | |
| 90 * @see org.eclipse.util.Buffer#asReadOnlyBuffer() | |
| 91 */ | |
| 92 public Buffer asReadOnlyBuffer() | |
| 93 { | |
| 94 if (isReadOnly()) return this; | |
| 95 return new View(this, markIndex(), getIndex(), putIndex(), READONLY); | |
| 96 } | |
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97 |
| 1005 | 98 public Buffer buffer() |
| 99 { | |
| 100 return this; | |
| 101 } | |
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102 |
| 1005 | 103 public void clear() |
| 104 { | |
| 105 setMarkIndex(-1); | |
| 106 setGetIndex(0); | |
| 107 setPutIndex(0); | |
| 108 } | |
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109 |
| 1005 | 110 public void compact() |
| 111 { | |
| 112 if (isReadOnly()) throw new IllegalStateException(__READONLY); | |
| 113 int s = markIndex() >= 0 ? markIndex() : getIndex(); | |
| 114 if (s > 0) | |
| 115 { | |
| 116 byte array[] = array(); | |
| 117 int length = putIndex() - s; | |
| 118 if (length > 0) | |
| 119 { | |
| 120 if (array != null) | |
| 121 System.arraycopy(array(), s, array(), 0, length); | |
| 122 else | |
| 123 poke(0, peek(s, length)); | |
| 124 } | |
| 125 if (markIndex() > 0) setMarkIndex(markIndex() - s); | |
| 126 setGetIndex(getIndex() - s); | |
| 127 setPutIndex(putIndex() - s); | |
| 128 } | |
| 129 } | |
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130 |
| 1005 | 131 @Override |
| 132 public boolean equals(Object obj) | |
| 133 { | |
| 134 if (obj==this) | |
| 135 return true; | |
| 136 | |
| 137 // reject non buffers; | |
| 138 if (obj == null || !(obj instanceof Buffer)) return false; | |
| 139 Buffer b = (Buffer) obj; | |
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140 |
| 1005 | 141 // reject different lengths |
| 142 if (b.length() != length()) return false; | |
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143 |
| 1005 | 144 // reject AbstractBuffer with different hash value |
| 145 if (_hash != 0 && obj instanceof AbstractBuffer) | |
| 146 { | |
| 147 AbstractBuffer ab = (AbstractBuffer) obj; | |
| 148 if (ab._hash != 0 && _hash != ab._hash) return false; | |
| 149 } | |
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150 |
| 1005 | 151 // Nothing for it but to do the hard grind. |
| 152 int get=getIndex(); | |
| 153 int bi=b.putIndex(); | |
| 154 for (int i = putIndex(); i-->get;) | |
| 155 { | |
| 156 byte b1 = peek(i); | |
| 157 byte b2 = b.peek(--bi); | |
| 158 if (b1 != b2) return false; | |
| 159 } | |
| 160 return true; | |
| 161 } | |
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162 |
| 1005 | 163 public byte get() |
| 164 { | |
| 165 return peek(_get++); | |
| 166 } | |
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167 |
| 1005 | 168 public int get(byte[] b, int offset, int length) |
| 169 { | |
| 170 int gi = getIndex(); | |
| 171 int l=length(); | |
| 172 if (l==0) | |
| 173 return -1; | |
| 174 | |
| 175 if (length>l) | |
| 176 length=l; | |
| 177 | |
| 178 length = peek(gi, b, offset, length); | |
| 179 if (length>0) | |
| 180 setGetIndex(gi + length); | |
| 181 return length; | |
| 182 } | |
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183 |
| 1005 | 184 public Buffer get(int length) |
| 185 { | |
| 186 int gi = getIndex(); | |
| 187 Buffer view = peek(gi, length); | |
| 188 setGetIndex(gi + length); | |
| 189 return view; | |
| 190 } | |
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191 |
| 1005 | 192 public final int getIndex() |
| 193 { | |
| 194 return _get; | |
| 195 } | |
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196 |
| 1005 | 197 public boolean hasContent() |
| 198 { | |
| 199 return _put > _get; | |
| 200 } | |
| 201 | |
| 202 @Override | |
| 203 public int hashCode() | |
| 204 { | |
| 205 if (_hash == 0 || _hashGet!=_get || _hashPut!=_put) | |
| 206 { | |
| 207 int get=getIndex(); | |
| 208 byte[] array = array(); | |
| 209 if (array==null) | |
| 210 { | |
| 211 for (int i = putIndex(); i-- >get;) | |
| 212 { | |
| 213 byte b = peek(i); | |
| 214 if ('a' <= b && b <= 'z') | |
| 215 b = (byte) (b - 'a' + 'A'); | |
| 216 _hash = 31 * _hash + b; | |
| 217 } | |
| 218 } | |
| 219 else | |
| 220 { | |
| 221 for (int i = putIndex(); i-- >get;) | |
| 222 { | |
| 223 byte b = array[i]; | |
| 224 if ('a' <= b && b <= 'z') | |
| 225 b = (byte) (b - 'a' + 'A'); | |
| 226 _hash = 31 * _hash + b; | |
| 227 } | |
| 228 } | |
| 229 if (_hash == 0) | |
| 230 _hash = -1; | |
| 231 _hashGet=_get; | |
| 232 _hashPut=_put; | |
| 233 | |
| 234 } | |
| 235 return _hash; | |
| 236 } | |
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237 |
| 1005 | 238 public boolean isImmutable() |
| 239 { | |
| 240 return _access <= IMMUTABLE; | |
| 241 } | |
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242 |
| 1005 | 243 public boolean isReadOnly() |
| 244 { | |
| 245 return _access <= READONLY; | |
| 246 } | |
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247 |
| 1005 | 248 public int length() |
| 249 { | |
| 250 return _put - _get; | |
| 251 } | |
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252 |
| 1005 | 253 public void mark() |
| 254 { | |
| 255 setMarkIndex(_get - 1); | |
| 256 } | |
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257 |
| 1005 | 258 public void mark(int offset) |
| 259 { | |
| 260 setMarkIndex(_get + offset); | |
| 261 } | |
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262 |
| 1005 | 263 public int markIndex() |
| 264 { | |
| 265 return _mark; | |
| 266 } | |
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267 |
| 1005 | 268 public byte peek() |
| 269 { | |
| 270 return peek(_get); | |
| 271 } | |
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272 |
| 1005 | 273 public Buffer peek(int index, int length) |
| 274 { | |
| 275 if (_view == null) | |
| 276 { | |
| 277 _view = new View(this, -1, index, index + length, isReadOnly() ? READONLY : READWRITE); | |
| 278 } | |
| 279 else | |
| 280 { | |
| 281 _view.update(this.buffer()); | |
| 282 _view.setMarkIndex(-1); | |
| 283 _view.setGetIndex(0); | |
| 284 _view.setPutIndex(index + length); | |
| 285 _view.setGetIndex(index); | |
| 286 | |
| 287 } | |
| 288 return _view; | |
| 289 } | |
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290 |
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291 @Override |
| 1005 | 292 public int poke(int index, Buffer src) |
| 293 { | |
| 294 _hash=0; | |
| 295 /* | |
| 296 if (isReadOnly()) | |
| 297 throw new IllegalStateException(__READONLY); | |
| 298 if (index < 0) | |
| 299 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 300 */ | |
| 301 | |
| 302 int length=src.length(); | |
| 303 if (index + length > capacity()) | |
| 304 { | |
| 305 length=capacity()-index; | |
| 306 /* | |
| 307 if (length<0) | |
| 308 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 309 */ | |
| 310 } | |
| 311 | |
| 312 byte[] src_array = src.array(); | |
| 313 byte[] dst_array = array(); | |
| 314 if (src_array != null && dst_array != null) | |
| 315 System.arraycopy(src_array, src.getIndex(), dst_array, index, length); | |
| 316 else if (src_array != null) | |
| 317 { | |
| 318 int s=src.getIndex(); | |
| 319 for (int i=0;i<length;i++) | |
| 320 poke(index++,src_array[s++]); | |
| 321 } | |
| 322 else if (dst_array != null) | |
| 323 { | |
| 324 int s=src.getIndex(); | |
| 325 for (int i=0;i<length;i++) | |
| 326 dst_array[index++]=src.peek(s++); | |
| 327 } | |
| 328 else | |
| 329 { | |
| 330 int s=src.getIndex(); | |
| 331 for (int i=0;i<length;i++) | |
| 332 poke(index++,src.peek(s++)); | |
| 333 } | |
| 334 | |
| 335 return length; | |
| 336 } | |
| 337 | |
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338 |
| 1005 | 339 public int poke(int index, byte[] b, int offset, int length) |
| 340 { | |
| 341 _hash=0; | |
| 342 /* | |
| 343 if (isReadOnly()) | |
| 344 throw new IllegalStateException(__READONLY); | |
| 345 if (index < 0) | |
| 346 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 347 */ | |
| 348 if (index + length > capacity()) | |
| 349 { | |
| 350 length=capacity()-index; | |
| 351 /* if (length<0) | |
| 352 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 353 */ | |
| 354 } | |
| 355 | |
| 356 byte[] dst_array = array(); | |
| 357 if (dst_array != null) | |
| 358 System.arraycopy(b, offset, dst_array, index, length); | |
| 359 else | |
| 360 { | |
| 361 int s=offset; | |
| 362 for (int i=0;i<length;i++) | |
| 363 poke(index++,b[s++]); | |
| 364 } | |
| 365 return length; | |
| 366 } | |
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367 |
| 1005 | 368 public int put(Buffer src) |
| 369 { | |
| 370 int pi = putIndex(); | |
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371 int l = poke(pi, src); |
| 1005 | 372 setPutIndex(pi + l); |
| 373 return l; | |
| 374 } | |
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375 |
| 1005 | 376 public void put(byte b) |
| 377 { | |
| 378 int pi = putIndex(); | |
| 379 poke(pi, b); | |
| 380 setPutIndex(pi + 1); | |
| 381 } | |
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382 |
| 1005 | 383 public int put(byte[] b, int offset, int length) |
| 384 { | |
| 385 int pi = putIndex(); | |
| 386 int l = poke(pi, b, offset, length); | |
| 387 setPutIndex(pi + l); | |
| 388 return l; | |
| 389 } | |
| 390 | |
| 391 public int put(byte[] b) | |
| 392 { | |
| 393 int pi = putIndex(); | |
| 394 int l = poke(pi, b, 0, b.length); | |
| 395 setPutIndex(pi + l); | |
| 396 return l; | |
| 397 } | |
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398 |
| 1005 | 399 public final int putIndex() |
| 400 { | |
| 401 return _put; | |
| 402 } | |
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403 |
| 1005 | 404 public void reset() |
| 405 { | |
| 406 if (markIndex() >= 0) setGetIndex(markIndex()); | |
| 407 } | |
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408 |
| 1005 | 409 public void rewind() |
| 410 { | |
| 411 setGetIndex(0); | |
| 412 setMarkIndex(-1); | |
| 413 } | |
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414 |
| 1005 | 415 public void setGetIndex(int getIndex) |
| 416 { | |
| 417 /* bounds checking | |
| 418 if (isImmutable()) | |
| 419 throw new IllegalStateException(__IMMUTABLE); | |
| 420 if (getIndex < 0) | |
| 421 throw new IllegalArgumentException("getIndex<0: " + getIndex + "<0"); | |
| 422 if (getIndex > putIndex()) | |
| 423 throw new IllegalArgumentException("getIndex>putIndex: " + getIndex + ">" + putIndex()); | |
| 424 */ | |
| 425 _get = getIndex; | |
| 426 _hash=0; | |
| 427 } | |
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428 |
| 1005 | 429 public void setMarkIndex(int index) |
| 430 { | |
| 431 /* | |
| 432 if (index>=0 && isImmutable()) | |
| 433 throw new IllegalStateException(__IMMUTABLE); | |
| 434 */ | |
| 435 _mark = index; | |
| 436 } | |
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437 |
| 1005 | 438 public void setPutIndex(int putIndex) |
| 439 { | |
| 440 /* bounds checking | |
| 441 if (isImmutable()) | |
| 442 throw new IllegalStateException(__IMMUTABLE); | |
| 443 if (putIndex > capacity()) | |
| 444 throw new IllegalArgumentException("putIndex>capacity: " + putIndex + ">" + capacity()); | |
| 445 if (getIndex() > putIndex) | |
| 446 throw new IllegalArgumentException("getIndex>putIndex: " + getIndex() + ">" + putIndex); | |
| 447 */ | |
| 448 _put = putIndex; | |
| 449 _hash=0; | |
| 450 } | |
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451 |
| 1005 | 452 public int skip(int n) |
| 453 { | |
| 454 if (length() < n) n = length(); | |
| 455 setGetIndex(getIndex() + n); | |
| 456 return n; | |
| 457 } | |
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458 |
| 1005 | 459 public Buffer slice() |
| 460 { | |
| 461 return peek(getIndex(), length()); | |
| 462 } | |
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463 |
| 1005 | 464 public Buffer sliceFromMark() |
| 465 { | |
| 466 return sliceFromMark(getIndex() - markIndex() - 1); | |
| 467 } | |
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468 |
| 1005 | 469 public Buffer sliceFromMark(int length) |
| 470 { | |
| 471 if (markIndex() < 0) return null; | |
| 472 Buffer view = peek(markIndex(), length); | |
| 473 setMarkIndex(-1); | |
| 474 return view; | |
| 475 } | |
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476 |
| 1005 | 477 public int space() |
| 478 { | |
| 479 return capacity() - _put; | |
| 480 } | |
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481 |
| 1005 | 482 public String toDetailString() |
| 483 { | |
| 484 StringBuilder buf = new StringBuilder(); | |
| 485 buf.append("["); | |
| 486 buf.append(super.hashCode()); | |
| 487 buf.append(","); | |
| 488 buf.append(this.buffer().hashCode()); | |
| 489 buf.append(",m="); | |
| 490 buf.append(markIndex()); | |
| 491 buf.append(",g="); | |
| 492 buf.append(getIndex()); | |
| 493 buf.append(",p="); | |
| 494 buf.append(putIndex()); | |
| 495 buf.append(",c="); | |
| 496 buf.append(capacity()); | |
| 497 buf.append("]={"); | |
| 498 if (markIndex() >= 0) | |
| 499 { | |
| 500 for (int i = markIndex(); i < getIndex(); i++) | |
| 501 { | |
| 502 byte b = peek(i); | |
| 503 TypeUtil.toHex(b,buf); | |
| 504 } | |
| 505 buf.append("}{"); | |
| 506 } | |
| 507 int count = 0; | |
| 508 for (int i = getIndex(); i < putIndex(); i++) | |
| 509 { | |
| 510 byte b = peek(i); | |
| 511 TypeUtil.toHex(b,buf); | |
| 512 if (count++ == 50) | |
| 513 { | |
| 514 if (putIndex() - i > 20) | |
| 515 { | |
| 516 buf.append(" ... "); | |
| 517 i = putIndex() - 20; | |
| 518 } | |
| 519 } | |
| 520 } | |
| 521 buf.append('}'); | |
| 522 return buf.toString(); | |
| 523 } | |
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524 |
| 1005 | 525 @Override |
| 526 public String toString() | |
| 527 { | |
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528 /* |
| 1005 | 529 if (isImmutable()) |
| 530 { | |
| 531 if (_string == null) | |
| 532 _string = new String(asArray(), 0, length()); | |
| 533 return _string; | |
| 534 } | |
| 535 return new String(asArray(), 0, length()); | |
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536 */ |
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537 return toString("ISO-8859-1"); |
| 1005 | 538 } |
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539 |
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540 @Override |
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541 public final String toString(String charset) |
| 1005 | 542 { |
| 543 try | |
| 544 { | |
| 545 byte[] bytes=array(); | |
| 546 if (bytes!=null) | |
| 547 return new String(bytes,getIndex(),length(),charset); | |
| 548 return new String(asArray(), 0, length(),charset); | |
| 549 | |
| 550 } | |
| 551 catch(Exception e) | |
| 552 { | |
| 553 LOG.warn("",e); | |
| 554 return new String(asArray(), 0, length()); | |
| 555 } | |
| 556 } | |
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557 |
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558 @Override |
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559 public final String toString(Charset charset) |
| 1005 | 560 { |
| 561 try | |
| 562 { | |
| 563 byte[] bytes=array(); | |
| 564 if (bytes!=null) | |
| 565 return new String(bytes,getIndex(),length(),charset); | |
| 566 return new String(asArray(), 0, length(),charset); | |
| 567 } | |
| 568 catch(Exception e) | |
| 569 { | |
| 570 LOG.warn("",e); | |
| 571 return new String(asArray(), 0, length()); | |
| 572 } | |
| 573 } | |
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574 |
| 1005 | 575 /* ------------------------------------------------------------ */ |
| 576 public String toDebugString() | |
| 577 { | |
| 578 return getClass()+"@"+super.hashCode(); | |
| 579 } | |
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580 |
| 1005 | 581 /* ------------------------------------------------------------ */ |
| 582 public int readFrom(InputStream in,int max) throws IOException | |
| 583 { | |
| 584 byte[] array = array(); | |
| 585 int s=space(); | |
| 586 if (s>max) | |
| 587 s=max; | |
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588 |
| 1005 | 589 if (array!=null) |
| 590 { | |
| 591 int l=in.read(array,_put,s); | |
| 592 if (l>0) | |
| 593 _put+=l; | |
| 594 return l; | |
| 595 } | |
| 596 else | |
| 597 { | |
| 598 byte[] buf=new byte[s>1024?1024:s]; | |
| 599 int total=0; | |
| 600 while (s>0) | |
| 601 { | |
| 602 int l=in.read(buf,0,buf.length); | |
| 603 if (l<0) | |
| 604 return total>0?total:-1; | |
| 605 int p=put(buf,0,l); | |
| 606 assert l==p; | |
| 607 s-=l; | |
| 608 } | |
| 609 return total; | |
| 610 } | |
| 611 } | |
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612 } |