Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.io; |
| 20 | |
| 21 | import java.io.IOException; |
| 22 | import java.io.InputStream; |
| 23 | import java.io.OutputStream; |
| 24 | import java.io.UnsupportedEncodingException; |
| 25 | |
| 26 | import org.eclipse.jetty.util.StringUtil; |
| 27 | |
| 28 | /* ------------------------------------------------------------------------------- */ |
| 29 | /** |
| 30 | * |
| 31 | */ |
| 32 | public class ByteArrayBuffer extends AbstractBuffer |
| 33 | { |
| 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; |
| 38 | |
| 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 | } |
| 48 | |
| 49 | public ByteArrayBuffer(byte[] bytes, int index, int length) |
| 50 | { |
| 51 | this(bytes, index, length, READWRITE); |
| 52 | } |
| 53 | |
| 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 | } |
| 62 | |
| 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 | } |
| 71 | |
| 72 | public ByteArrayBuffer(int size) |
| 73 | { |
| 74 | this(new byte[size], 0, 0, READWRITE); |
| 75 | setPutIndex(0); |
| 76 | } |
| 77 | |
| 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 | } |
| 100 | |
| 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 | } |
| 110 | |
| 111 | public byte[] array() |
| 112 | { |
| 113 | return _bytes; |
| 114 | } |
| 115 | |
| 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 | } |
| 139 | |
| 140 | |
| 141 | @Override |
| 142 | public boolean equals(Object obj) |
| 143 | { |
| 144 | if (obj==this) |
| 145 | return true; |
| 146 | |
| 147 | if (obj == null || !(obj instanceof Buffer)) |
| 148 | return false; |
| 149 | |
| 150 | if (obj instanceof Buffer.CaseInsensitve) |
| 151 | return equalsIgnoreCase((Buffer)obj); |
| 152 | |
| 153 | |
| 154 | Buffer b = (Buffer) obj; |
| 155 | |
| 156 | // reject different lengths |
| 157 | if (b.length() != length()) |
| 158 | return false; |
| 159 | |
| 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 | } |
| 167 | |
| 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 | } |
| 179 | |
| 180 | |
| 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; |
| 190 | |
| 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 | } |
| 197 | |
| 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 | } |
| 232 | |
| 233 | @Override |
| 234 | public byte get() |
| 235 | { |
| 236 | return _bytes[_get++]; |
| 237 | } |
| 238 | |
| 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 | } |
| 282 | |
| 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 | |
| 332 | |
| 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 | /* ------------------------------------------------------------ */ |
| 358 | @Override |
| 359 | public void writeTo(OutputStream out) |
| 360 | throws IOException |
| 361 | { |
| 362 | int len=length(); |
| 363 | if (MAX_WRITE>0 && len>MAX_WRITE) |
| 364 | { |
| 365 | int off=getIndex(); |
| 366 | while(len>0) |
| 367 | { |
| 368 | int c=len>MAX_WRITE?MAX_WRITE:len; |
| 369 | out.write(_bytes,off,c); |
| 370 | off+=c; |
| 371 | len-=c; |
| 372 | } |
| 373 | } |
| 374 | else |
| 375 | out.write(_bytes,getIndex(),len); |
| 376 | if (!isImmutable()) |
| 377 | clear(); |
| 378 | } |
| 379 | |
| 380 | /* ------------------------------------------------------------ */ |
| 381 | @Override |
| 382 | public int readFrom(InputStream in,int max) throws IOException |
| 383 | { |
| 384 | if (max<0||max>space()) |
| 385 | max=space(); |
| 386 | int p = putIndex(); |
| 387 | |
| 388 | int len=0, total=0, available=max; |
| 389 | while (total<max) |
| 390 | { |
| 391 | len=in.read(_bytes,p,available); |
| 392 | if (len<0) |
| 393 | break; |
| 394 | else if (len>0) |
| 395 | { |
| 396 | p += len; |
| 397 | total += len; |
| 398 | available -= len; |
| 399 | setPutIndex(p); |
| 400 | } |
| 401 | if (in.available()<=0) |
| 402 | break; |
| 403 | } |
| 404 | if (len<0 && total==0) |
| 405 | return -1; |
| 406 | return total; |
| 407 | } |
| 408 | |
| 409 | /* ------------------------------------------------------------ */ |
| 410 | @Override |
| 411 | public int space() |
| 412 | { |
| 413 | return _bytes.length - _put; |
| 414 | } |
| 415 | |
| 416 | |
| 417 | /* ------------------------------------------------------------ */ |
| 418 | /* ------------------------------------------------------------ */ |
| 419 | /* ------------------------------------------------------------ */ |
| 420 | public static class CaseInsensitive extends ByteArrayBuffer implements Buffer.CaseInsensitve |
| 421 | { |
| 422 | public CaseInsensitive(String s) |
| 423 | { |
| 424 | super(s); |
| 425 | } |
| 426 | |
| 427 | public CaseInsensitive(byte[] b, int o, int l, int rw) |
| 428 | { |
| 429 | super(b,o,l,rw); |
| 430 | } |
| 431 | |
| 432 | @Override |
| 433 | public boolean equals(Object obj) |
| 434 | { |
| 435 | return obj instanceof Buffer && equalsIgnoreCase((Buffer)obj); |
| 436 | } |
| 437 | |
| 438 | } |
| 439 | } |