1/*- 2 * See the file LICENSE for redistribution information. 3 * 4 * Copyright (c) 2002,2008 Oracle. All rights reserved. 5 * 6 * $Id: WidenerInput.java,v 1.1 2008/02/07 17:12:27 mark Exp $ 7 */ 8 9package com.sleepycat.persist.impl; 10 11import java.math.BigInteger; 12 13/** 14 * Widens a value returned by another input when any readXxx method is called. 15 * Used to cause an Accessor to read a widened value. 16 * 17 * For non-key fields we support all Java primitive widening: 18 * - byte to short, int, long, float, double or BigInteger 19 * - short to int, long, float, double or BigInteger 20 * - char to int, long, float, double or BigInteger 21 * - int to long, float, double or BigInteger 22 * - long to float, double or BigInteger 23 * - float to double 24 * 25 * For non-key fields we also support: 26 * - Java reference widening 27 * - primitive to primitive wrapper 28 * - Java primitive widening to corresponding primitive wrappers 29 * - Java widening of primitive wrapper to primitive wrapper 30 * 31 * For secondary keys fields we ONLY support: 32 * - primitive to primitive wrapper 33 * 34 * But for primary keys and composite key fields we ONLY support: 35 * - primitive to primitive wrapper 36 * - primitive wrapper to primitive 37 * These conversions don't require any converter, since the stored format is 38 * not changed. A WidenerInput is not used for these changes. 39 * 40 * @author Mark Hayes 41 */ 42class WidenerInput extends AbstractInput { 43 44 private EntityInput input; 45 private int fromFormatId; 46 private int toFormatId; 47 48 /** 49 * Returns whether widening is supported by this class. If false is 50 * returned by this method, then widening is disallowed and a field 51 * converter or deleter is necessary. 52 */ 53 static boolean isWideningSupported(Format fromFormat, 54 Format toFormat, 55 boolean isSecKeyField) { 56 int fromFormatId = fromFormat.getId(); 57 int toFormatId = toFormat.getId(); 58 59 switch (fromFormatId) { 60 case Format.ID_BOOL: 61 switch (toFormatId) { 62 case Format.ID_BOOL_W: 63 return true; 64 default: 65 return false; 66 } 67 case Format.ID_BYTE: 68 switch (toFormatId) { 69 case Format.ID_BYTE_W: 70 return true; 71 case Format.ID_SHORT: 72 case Format.ID_SHORT_W: 73 case Format.ID_INT: 74 case Format.ID_INT_W: 75 case Format.ID_LONG: 76 case Format.ID_LONG_W: 77 case Format.ID_FLOAT: 78 case Format.ID_FLOAT_W: 79 case Format.ID_DOUBLE: 80 case Format.ID_DOUBLE_W: 81 case Format.ID_BIGINT: 82 return !isSecKeyField; 83 default: 84 return false; 85 } 86 case Format.ID_BYTE_W: 87 switch (toFormatId) { 88 case Format.ID_SHORT_W: 89 case Format.ID_INT_W: 90 case Format.ID_LONG_W: 91 case Format.ID_FLOAT_W: 92 case Format.ID_DOUBLE_W: 93 case Format.ID_BIGINT: 94 return !isSecKeyField; 95 default: 96 return false; 97 } 98 case Format.ID_SHORT: 99 switch (toFormatId) { 100 case Format.ID_SHORT_W: 101 return true; 102 case Format.ID_INT: 103 case Format.ID_INT_W: 104 case Format.ID_LONG: 105 case Format.ID_LONG_W: 106 case Format.ID_FLOAT: 107 case Format.ID_FLOAT_W: 108 case Format.ID_DOUBLE: 109 case Format.ID_DOUBLE_W: 110 case Format.ID_BIGINT: 111 return !isSecKeyField; 112 default: 113 return false; 114 } 115 case Format.ID_SHORT_W: 116 switch (toFormatId) { 117 case Format.ID_INT_W: 118 case Format.ID_LONG_W: 119 case Format.ID_FLOAT_W: 120 case Format.ID_DOUBLE_W: 121 case Format.ID_BIGINT: 122 return !isSecKeyField; 123 default: 124 return false; 125 } 126 case Format.ID_INT: 127 switch (toFormatId) { 128 case Format.ID_INT_W: 129 return true; 130 case Format.ID_LONG: 131 case Format.ID_LONG_W: 132 case Format.ID_FLOAT: 133 case Format.ID_FLOAT_W: 134 case Format.ID_DOUBLE: 135 case Format.ID_DOUBLE_W: 136 case Format.ID_BIGINT: 137 return !isSecKeyField; 138 default: 139 return false; 140 } 141 case Format.ID_INT_W: 142 switch (toFormatId) { 143 case Format.ID_LONG_W: 144 case Format.ID_FLOAT_W: 145 case Format.ID_DOUBLE_W: 146 case Format.ID_BIGINT: 147 return !isSecKeyField; 148 default: 149 return false; 150 } 151 case Format.ID_LONG: 152 switch (toFormatId) { 153 case Format.ID_LONG_W: 154 return true; 155 case Format.ID_FLOAT: 156 case Format.ID_FLOAT_W: 157 case Format.ID_DOUBLE: 158 case Format.ID_DOUBLE_W: 159 case Format.ID_BIGINT: 160 return !isSecKeyField; 161 default: 162 return false; 163 } 164 case Format.ID_LONG_W: 165 switch (toFormatId) { 166 case Format.ID_FLOAT_W: 167 case Format.ID_DOUBLE_W: 168 case Format.ID_BIGINT: 169 return !isSecKeyField; 170 default: 171 return false; 172 } 173 case Format.ID_FLOAT: 174 switch (toFormatId) { 175 case Format.ID_FLOAT_W: 176 return true; 177 case Format.ID_DOUBLE: 178 case Format.ID_DOUBLE_W: 179 return !isSecKeyField; 180 default: 181 return false; 182 } 183 case Format.ID_FLOAT_W: 184 switch (toFormatId) { 185 case Format.ID_DOUBLE_W: 186 return !isSecKeyField; 187 default: 188 return false; 189 } 190 case Format.ID_DOUBLE: 191 switch (toFormatId) { 192 case Format.ID_DOUBLE_W: 193 return true; 194 default: 195 return false; 196 } 197 case Format.ID_CHAR: 198 switch (toFormatId) { 199 case Format.ID_CHAR_W: 200 return true; 201 case Format.ID_INT: 202 case Format.ID_INT_W: 203 case Format.ID_LONG: 204 case Format.ID_LONG_W: 205 case Format.ID_FLOAT: 206 case Format.ID_FLOAT_W: 207 case Format.ID_DOUBLE: 208 case Format.ID_DOUBLE_W: 209 case Format.ID_BIGINT: 210 return !isSecKeyField; 211 default: 212 return false; 213 } 214 case Format.ID_CHAR_W: 215 switch (toFormatId) { 216 case Format.ID_INT_W: 217 case Format.ID_LONG_W: 218 case Format.ID_FLOAT_W: 219 case Format.ID_DOUBLE_W: 220 case Format.ID_BIGINT: 221 return !isSecKeyField; 222 default: 223 return false; 224 } 225 default: 226 return false; 227 } 228 } 229 230 WidenerInput(EntityInput input, int fromFormatId, int toFormatId) { 231 super(input.getCatalog(), input.isRawAccess()); 232 this.input = input; 233 this.fromFormatId = fromFormatId; 234 this.toFormatId = toFormatId; 235 } 236 237 public void registerPriKeyObject(Object o) { 238 input.registerPriKeyObject(o); 239 } 240 241 public int readArrayLength() { 242 throw new UnsupportedOperationException(); 243 } 244 245 public int readEnumConstant(String[] names) { 246 throw new UnsupportedOperationException(); 247 } 248 249 public void skipField(Format declaredFormat) { 250 throw new UnsupportedOperationException(); 251 } 252 253 public String readString() { 254 throw new UnsupportedOperationException(); 255 } 256 257 public Object readKeyObject(Format fromFormat) { 258 return readObject(); 259 } 260 261 public Object readObject() { 262 switch (fromFormatId) { 263 case Format.ID_BOOL: 264 checkToFormat(Format.ID_BOOL_W); 265 return input.readBoolean(); 266 case Format.ID_BYTE: 267 return byteToObject(input.readByte()); 268 case Format.ID_BYTE_W: 269 Byte b = (Byte) input.readObject(); 270 return (b != null) ? byteToObject(b) : null; 271 case Format.ID_SHORT: 272 return shortToObject(input.readShort()); 273 case Format.ID_SHORT_W: 274 Short s = (Short) input.readObject(); 275 return (s != null) ? shortToObject(s) : null; 276 case Format.ID_INT: 277 return intToObject(input.readInt()); 278 case Format.ID_INT_W: 279 Integer i = (Integer) input.readObject(); 280 return (i != null) ? intToObject(i) : null; 281 case Format.ID_LONG: 282 return longToObject(input.readLong()); 283 case Format.ID_LONG_W: 284 Long l = (Long) input.readObject(); 285 return (l != null) ? longToObject(l) : null; 286 case Format.ID_FLOAT: 287 return floatToObject(input.readSortedFloat()); 288 case Format.ID_FLOAT_W: 289 Float f = (Float) input.readObject(); 290 return (f != null) ? floatToObject(f) : null; 291 case Format.ID_DOUBLE: 292 checkToFormat(Format.ID_DOUBLE_W); 293 return input.readSortedDouble(); 294 case Format.ID_CHAR: 295 return charToObject(input.readChar()); 296 case Format.ID_CHAR_W: 297 Character c = (Character) input.readObject(); 298 return (c != null) ? charToObject(c) : null; 299 default: 300 throw new IllegalStateException(String.valueOf(fromFormatId)); 301 } 302 } 303 304 private Object byteToObject(byte v) { 305 switch (toFormatId) { 306 case Format.ID_BYTE: 307 case Format.ID_BYTE_W: 308 return Byte.valueOf(v); 309 case Format.ID_SHORT: 310 case Format.ID_SHORT_W: 311 return Short.valueOf(v); 312 case Format.ID_INT: 313 case Format.ID_INT_W: 314 return Integer.valueOf(v); 315 case Format.ID_LONG: 316 case Format.ID_LONG_W: 317 return Long.valueOf(v); 318 case Format.ID_FLOAT: 319 case Format.ID_FLOAT_W: 320 return Float.valueOf(v); 321 case Format.ID_DOUBLE: 322 case Format.ID_DOUBLE_W: 323 return Double.valueOf(v); 324 case Format.ID_BIGINT: 325 return BigInteger.valueOf(v); 326 default: 327 throw new IllegalStateException(String.valueOf(toFormatId)); 328 } 329 } 330 331 private Object shortToObject(short v) { 332 switch (toFormatId) { 333 case Format.ID_SHORT: 334 case Format.ID_SHORT_W: 335 return Short.valueOf(v); 336 case Format.ID_INT: 337 case Format.ID_INT_W: 338 return Integer.valueOf(v); 339 case Format.ID_LONG: 340 case Format.ID_LONG_W: 341 return Long.valueOf(v); 342 case Format.ID_FLOAT: 343 case Format.ID_FLOAT_W: 344 return Float.valueOf(v); 345 case Format.ID_DOUBLE: 346 case Format.ID_DOUBLE_W: 347 return Double.valueOf(v); 348 case Format.ID_BIGINT: 349 return BigInteger.valueOf(v); 350 default: 351 throw new IllegalStateException(String.valueOf(toFormatId)); 352 } 353 } 354 355 private Object intToObject(int v) { 356 switch (toFormatId) { 357 case Format.ID_INT: 358 case Format.ID_INT_W: 359 return Integer.valueOf(v); 360 case Format.ID_LONG: 361 case Format.ID_LONG_W: 362 return Long.valueOf(v); 363 case Format.ID_FLOAT: 364 case Format.ID_FLOAT_W: 365 return Float.valueOf(v); 366 case Format.ID_DOUBLE: 367 case Format.ID_DOUBLE_W: 368 return Double.valueOf(v); 369 case Format.ID_BIGINT: 370 return BigInteger.valueOf(v); 371 default: 372 throw new IllegalStateException(String.valueOf(toFormatId)); 373 } 374 } 375 376 private Object longToObject(long v) { 377 switch (toFormatId) { 378 case Format.ID_LONG: 379 case Format.ID_LONG_W: 380 return Long.valueOf(v); 381 case Format.ID_FLOAT: 382 case Format.ID_FLOAT_W: 383 return Float.valueOf(v); 384 case Format.ID_DOUBLE: 385 case Format.ID_DOUBLE_W: 386 return Double.valueOf(v); 387 case Format.ID_BIGINT: 388 return BigInteger.valueOf(v); 389 default: 390 throw new IllegalStateException(String.valueOf(toFormatId)); 391 } 392 } 393 394 private Object floatToObject(float v) { 395 switch (toFormatId) { 396 case Format.ID_FLOAT: 397 case Format.ID_FLOAT_W: 398 return Float.valueOf(v); 399 case Format.ID_DOUBLE: 400 case Format.ID_DOUBLE_W: 401 return Double.valueOf(v); 402 default: 403 throw new IllegalStateException(String.valueOf(toFormatId)); 404 } 405 } 406 407 private Object charToObject(char v) { 408 switch (toFormatId) { 409 case Format.ID_CHAR: 410 case Format.ID_CHAR_W: 411 return Character.valueOf(v); 412 case Format.ID_INT: 413 case Format.ID_INT_W: 414 return Integer.valueOf(v); 415 case Format.ID_LONG: 416 case Format.ID_LONG_W: 417 return Long.valueOf(v); 418 case Format.ID_FLOAT: 419 case Format.ID_FLOAT_W: 420 return Float.valueOf(v); 421 case Format.ID_DOUBLE: 422 case Format.ID_DOUBLE_W: 423 return Double.valueOf(v); 424 case Format.ID_BIGINT: 425 return BigInteger.valueOf(v); 426 default: 427 throw new IllegalStateException(String.valueOf(toFormatId)); 428 } 429 } 430 431 public char readChar() { 432 throw new IllegalStateException(String.valueOf(fromFormatId)); 433 } 434 435 public boolean readBoolean() { 436 throw new IllegalStateException(String.valueOf(fromFormatId)); 437 } 438 439 public byte readByte() { 440 throw new IllegalStateException(String.valueOf(fromFormatId)); 441 } 442 443 public short readShort() { 444 checkToFormat(Format.ID_SHORT); 445 switch (fromFormatId) { 446 case Format.ID_BYTE: 447 return input.readByte(); 448 default: 449 throw new IllegalStateException(String.valueOf(fromFormatId)); 450 } 451 } 452 453 public int readInt() { 454 checkToFormat(Format.ID_INT); 455 switch (fromFormatId) { 456 case Format.ID_BYTE: 457 return input.readByte(); 458 case Format.ID_SHORT: 459 return input.readShort(); 460 case Format.ID_CHAR: 461 return input.readChar(); 462 default: 463 throw new IllegalStateException(String.valueOf(fromFormatId)); 464 } 465 } 466 467 public long readLong() { 468 checkToFormat(Format.ID_LONG); 469 switch (fromFormatId) { 470 case Format.ID_BYTE: 471 return input.readByte(); 472 case Format.ID_SHORT: 473 return input.readShort(); 474 case Format.ID_INT: 475 return input.readInt(); 476 case Format.ID_CHAR: 477 return input.readChar(); 478 default: 479 throw new IllegalStateException(String.valueOf(fromFormatId)); 480 } 481 } 482 483 public float readSortedFloat() { 484 checkToFormat(Format.ID_FLOAT); 485 switch (fromFormatId) { 486 case Format.ID_BYTE: 487 return input.readByte(); 488 case Format.ID_SHORT: 489 return input.readShort(); 490 case Format.ID_INT: 491 return input.readInt(); 492 case Format.ID_LONG: 493 return input.readLong(); 494 case Format.ID_CHAR: 495 return input.readChar(); 496 default: 497 throw new IllegalStateException(String.valueOf(fromFormatId)); 498 } 499 } 500 501 public double readSortedDouble() { 502 checkToFormat(Format.ID_DOUBLE); 503 switch (fromFormatId) { 504 case Format.ID_BYTE: 505 return input.readByte(); 506 case Format.ID_SHORT: 507 return input.readShort(); 508 case Format.ID_INT: 509 return input.readInt(); 510 case Format.ID_LONG: 511 return input.readLong(); 512 case Format.ID_FLOAT: 513 return input.readSortedFloat(); 514 case Format.ID_CHAR: 515 return input.readChar(); 516 default: 517 throw new IllegalStateException(String.valueOf(fromFormatId)); 518 } 519 } 520 521 public BigInteger readBigInteger() { 522 checkToFormat(Format.ID_BIGINT); 523 switch (fromFormatId) { 524 case Format.ID_BYTE: 525 return BigInteger.valueOf(input.readByte()); 526 case Format.ID_SHORT: 527 return BigInteger.valueOf(input.readShort()); 528 case Format.ID_INT: 529 return BigInteger.valueOf(input.readInt()); 530 case Format.ID_LONG: 531 return BigInteger.valueOf(input.readLong()); 532 case Format.ID_CHAR: 533 return BigInteger.valueOf(input.readChar()); 534 default: 535 throw new IllegalStateException(String.valueOf(fromFormatId)); 536 } 537 } 538 539 private void checkToFormat(int id) { 540 if (toFormatId != id) { 541 throw new IllegalStateException(String.valueOf(toFormatId)); 542 } 543 } 544} 545