| 1 | /* ============================================================= |
| 2 | * SmallSQL : a free Java DBMS library for the Java(tm) platform |
| 3 | * ============================================================= |
| 4 | * |
| 5 | * (C) Copyright 2004-2006, by Volker Berlin. |
| 6 | * |
| 7 | * Project Info: http://www.smallsql.de/ |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU Lesser General Public License as published by |
| 11 | * the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 17 | * License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| 22 | * USA. |
| 23 | * |
| 24 | * [Java is a trademark or registered trademark of Sun Microsystems, Inc. |
| 25 | * in the United States and other countries.] |
| 26 | * |
| 27 | * --------------- |
| 28 | * ExpressionValue.java |
| 29 | * --------------- |
| 30 | * Author: Volker Berlin |
| 31 | * |
| 32 | */ |
| 33 | package smallsql.database; |
| 34 | |
| 35 | import java.math.BigDecimal; |
| 36 | import java.sql.*; |
| 37 | |
| 38 | |
| 39 | public class ExpressionValue extends Expression { |
| 40 | |
| 41 | private Object value; |
| 42 | private int dataType; |
| 43 | private int length; |
| 44 | |
| 45 | /** |
| 46 | * Constructor is used from PreparedStatement parameters ( '?' in sql expression ) |
| 47 | */ |
| 48 | ExpressionValue(){ |
| 49 | super(VALUE); |
| 50 | clear(); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Constructor is used from Constructor GroupResult |
| 55 | */ |
| 56 | ExpressionValue(int type){ |
| 57 | super(type); |
| 58 | switch(type){ |
| 59 | case GROUP_BY: |
| 60 | case SUM: |
| 61 | case FIRST: |
| 62 | case LAST: |
| 63 | clear(); |
| 64 | break; |
| 65 | case MIN: |
| 66 | case MAX: |
| 67 | // set value to null |
| 68 | break; |
| 69 | case COUNT: |
| 70 | value = new MutableInteger(0); |
| 71 | dataType = SQLTokenizer.INT; |
| 72 | break; |
| 73 | default: throw new Error(); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | |
| 78 | /** |
| 79 | * Constructor for static Expression i.e. 0x23, 67, 23.8, 'qwert' |
| 80 | */ |
| 81 | ExpressionValue(Object value, int dataType ){ |
| 82 | super(VALUE); |
| 83 | this.value = value; |
| 84 | this.dataType = dataType; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | /** |
| 89 | * Is used in GroupResult. |
| 90 | */ |
| 91 | public boolean equals(Object expr){ |
| 92 | if(!super.equals(expr)) return false; |
| 93 | if(!(expr instanceof ExpressionValue)) return false; |
| 94 | Object v = ((ExpressionValue)expr).value; |
| 95 | if(v == value) return true; |
| 96 | if(value == null) return false; |
| 97 | return value.equals(v); |
| 98 | } |
| 99 | |
| 100 | |
| 101 | /*============================================================================== |
| 102 | methods for Grouping |
| 103 | ==============================================================================*/ |
| 104 | /** |
| 105 | * Accumulate the value of the expression to this aggregate function value. |
| 106 | */ |
| 107 | void accumulate(Expression expr) throws Exception{ |
| 108 | int type = getType(); |
| 109 | if(type != GROUP_BY) expr = expr.getParams()[0]; |
| 110 | switch(type){ |
| 111 | case GROUP_BY: |
| 112 | case FIRST: |
| 113 | if(isEmpty()) set( expr.getObject(), expr.getDataType() ); |
| 114 | break; |
| 115 | case LAST: |
| 116 | set( expr.getObject(), expr.getDataType() ); |
| 117 | break; |
| 118 | case COUNT: |
| 119 | if(!expr.isNull()) ((MutableInteger)value).value++; |
| 120 | break; |
| 121 | case SUM: |
| 122 | if(isEmpty()){ |
| 123 | initValue( expr ); |
| 124 | }else |
| 125 | switch(dataType){ |
| 126 | case SQLTokenizer.TINYINT: |
| 127 | case SQLTokenizer.SMALLINT: |
| 128 | case SQLTokenizer.INT: |
| 129 | ((MutableInteger)value).value += expr.getInt(); |
| 130 | break; |
| 131 | case SQLTokenizer.BIGINT: |
| 132 | ((MutableLong)value).value += expr.getLong(); |
| 133 | break; |
| 134 | case SQLTokenizer.REAL: |
| 135 | ((MutableFloat)value).value += expr.getFloat(); |
| 136 | break; |
| 137 | case SQLTokenizer.FLOAT: |
| 138 | case SQLTokenizer.DOUBLE: |
| 139 | ((MutableDouble)value).value += expr.getDouble(); |
| 140 | break; |
| 141 | case SQLTokenizer.NUMERIC: |
| 142 | case SQLTokenizer.DECIMAL: |
| 143 | MutableNumeric newValue = expr.getNumeric(); |
| 144 | if(newValue != null) |
| 145 | ((MutableNumeric)value).add( newValue ); |
| 146 | break; |
| 147 | case SQLTokenizer.MONEY: |
| 148 | ((Money)value).value += expr.getMoney(); |
| 149 | break; |
| 150 | default: throw Utils.createSQLException("Unsupported data type "+SQLTokenizer.getKeyWord(dataType) +" for SUM function."); |
| 151 | } |
| 152 | break; |
| 153 | case MAX: |
| 154 | if(value == null){ |
| 155 | if(expr.isNull()) |
| 156 | dataType = expr.getDataType(); |
| 157 | else |
| 158 | initValue( expr ); |
| 159 | }else if(!expr.isNull()){ |
| 160 | switch(dataType){ |
| 161 | case SQLTokenizer.TINYINT: |
| 162 | case SQLTokenizer.SMALLINT: |
| 163 | case SQLTokenizer.INT: |
| 164 | ((MutableInteger)value).value = Math.max( ((MutableInteger)value).value, expr.getInt()); |
| 165 | break; |
| 166 | case SQLTokenizer.BIGINT: |
| 167 | ((MutableLong)value).value = Math.max( ((MutableLong)value).value, expr.getLong()); |
| 168 | break; |
| 169 | case SQLTokenizer.REAL: |
| 170 | ((MutableFloat)value).value = Math.max( ((MutableFloat)value).value, expr.getFloat()); |
| 171 | break; |
| 172 | case SQLTokenizer.FLOAT: |
| 173 | case SQLTokenizer.DOUBLE: |
| 174 | ((MutableDouble)value).value = Math.max( ((MutableDouble)value).value, expr.getDouble()); |
| 175 | break; |
| 176 | case SQLTokenizer.CHAR: |
| 177 | case SQLTokenizer.VARCHAR: |
| 178 | case SQLTokenizer.LONGVARCHAR: |
| 179 | String str = expr.getString(); |
| 180 | if(String.CASE_INSENSITIVE_ORDER.compare( value, str ) < 0) |
| 181 | value = str; |
| 182 | break; |
| 183 | case SQLTokenizer.NUMERIC: |
| 184 | case SQLTokenizer.DECIMAL: |
| 185 | MutableNumeric newValue = expr.getNumeric(); |
| 186 | if(((MutableNumeric)value).compareTo( newValue ) < 0) |
| 187 | value = newValue; |
| 188 | break; |
| 189 | case SQLTokenizer.MONEY: |
| 190 | ((Money)value).value = Math.max( ((Money)value).value, expr.getMoney()); |
| 191 | break; |
| 192 | case SQLTokenizer.TIMESTAMP: |
| 193 | case SQLTokenizer.SMALLDATETIME: |
| 194 | case SQLTokenizer.DATE: |
| 195 | case SQLTokenizer.TIME: |
| 196 | ((DateTime)value).time = Math.max( ((DateTime)value).time, expr.getLong()); |
| 197 | break; |
| 198 | default: throw new Error(""+dataType); |
| 199 | } |
| 200 | } |
| 201 | break; |
| 202 | case MIN: |
| 203 | if(value == null){ |
| 204 | if(expr.isNull()) |
| 205 | dataType = expr.getDataType(); |
| 206 | else |
| 207 | initValue( expr ); |
| 208 | }else if(!expr.isNull()){ |
| 209 | switch(dataType){ |
| 210 | case SQLTokenizer.TINYINT: |
| 211 | case SQLTokenizer.SMALLINT: |
| 212 | case SQLTokenizer.INT: |
| 213 | ((MutableInteger)value).value = Math.min( ((MutableInteger)value).value, expr.getInt()); |
| 214 | break; |
| 215 | case SQLTokenizer.BIGINT: |
| 216 | ((MutableLong)value).value = Math.min( ((MutableLong)value).value, expr.getLong()); |
| 217 | break; |
| 218 | case SQLTokenizer.REAL: |
| 219 | ((MutableFloat)value).value = Math.min( ((MutableFloat)value).value, expr.getFloat()); |
| 220 | break; |
| 221 | case SQLTokenizer.FLOAT: |
| 222 | case SQLTokenizer.DOUBLE: |
| 223 | ((MutableDouble)value).value = Math.min( ((MutableDouble)value).value, expr.getDouble()); |
| 224 | break; |
| 225 | case SQLTokenizer.CHAR: |
| 226 | case SQLTokenizer.VARCHAR: |
| 227 | case SQLTokenizer.LONGVARCHAR: |
| 228 | String str = expr.getString(); |
| 229 | if(String.CASE_INSENSITIVE_ORDER.compare( value, str ) > 0) |
| 230 | value = str; |
| 231 | break; |
| 232 | case SQLTokenizer.NUMERIC: |
| 233 | case SQLTokenizer.DECIMAL: |
| 234 | MutableNumeric newValue = expr.getNumeric(); |
| 235 | if(((MutableNumeric)value).compareTo( newValue ) > 0) |
| 236 | value = newValue; |
| 237 | break; |
| 238 | case SQLTokenizer.MONEY: |
| 239 | ((Money)value).value = Math.min( ((Money)value).value, expr.getMoney()); |
| 240 | break; |
| 241 | case SQLTokenizer.TIMESTAMP: |
| 242 | case SQLTokenizer.SMALLDATETIME: |
| 243 | case SQLTokenizer.DATE: |
| 244 | case SQLTokenizer.TIME: |
| 245 | ((DateTime)value).time = Math.min( ((DateTime)value).time, expr.getLong()); |
| 246 | break; |
| 247 | default: throw new Error(""+dataType); |
| 248 | } |
| 249 | } |
| 250 | break; |
| 251 | default: throw new Error(); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | |
| 256 | /** |
| 257 | * Init a summary field with a Mutable |
| 258 | * @param expr the expression that produce the values which should be summary |
| 259 | * @throws Exception |
| 260 | */ |
| 261 | private void initValue(Expression expr) throws Exception{ |
| 262 | dataType = expr.getDataType(); |
| 263 | switch(dataType){ |
| 264 | case SQLTokenizer.TINYINT: |
| 265 | case SQLTokenizer.SMALLINT: |
| 266 | case SQLTokenizer.INT: |
| 267 | value = new MutableInteger(expr.getInt()); |
| 268 | break; |
| 269 | case SQLTokenizer.BIGINT: |
| 270 | value = new MutableLong(expr.getLong()); |
| 271 | break; |
| 272 | case SQLTokenizer.REAL: |
| 273 | value = new MutableFloat(expr.getFloat()); |
| 274 | break; |
| 275 | case SQLTokenizer.FLOAT: |
| 276 | case SQLTokenizer.DOUBLE: |
| 277 | value = new MutableDouble(expr.getDouble()); |
| 278 | break; |
| 279 | case SQLTokenizer.SMALLMONEY: |
| 280 | case SQLTokenizer.MONEY: |
| 281 | value = Money.createFromUnscaledValue(expr.getMoney()); |
| 282 | break; |
| 283 | case SQLTokenizer.NUMERIC: |
| 284 | case SQLTokenizer.DECIMAL: |
| 285 | value = new MutableNumeric(expr.getNumeric()); |
| 286 | break; |
| 287 | case SQLTokenizer.TIMESTAMP: |
| 288 | case SQLTokenizer.SMALLDATETIME: |
| 289 | case SQLTokenizer.DATE: |
| 290 | case SQLTokenizer.TIME: |
| 291 | value = new DateTime(expr.getLong(), dataType); |
| 292 | break; |
| 293 | default: |
| 294 | // is used for MAX and MIN |
| 295 | value = expr.getObject(); |
| 296 | } |
| 297 | } |
| 298 | /*============================================================================== |
| 299 | methods for PreparedStatement parameters |
| 300 | ==============================================================================*/ |
| 301 | private static final Object EMPTY = new Object(); |
| 302 | final boolean isEmpty(){ |
| 303 | return value == EMPTY; |
| 304 | } |
| 305 | |
| 306 | final void clear(){ |
| 307 | value = EMPTY; |
| 308 | } |
| 309 | |
| 310 | |
| 311 | final void set( Object value, int _dataType, int length ) throws SQLException{ |
| 312 | set( value, _dataType ); |
| 313 | this.length = length; |
| 314 | } |
| 315 | |
| 316 | |
| 317 | /** |
| 318 | * |
| 319 | * @param newValue The new Value. |
| 320 | * @param newDataType The data type of the new Value (One of the SQLTokenizer const). |
| 321 | * If the type is -1 then the data type is verify with many instanceof expressions. |
| 322 | * @throws SQLException If the newValue is not a instance of a know class. |
| 323 | */ |
| 324 | final void set( Object newValue, int newDataType ) throws SQLException{ |
| 325 | this.value = newValue; |
| 326 | this.dataType = newDataType; |
| 327 | if(dataType < 0){ |
| 328 | if(newValue == null) |
| 329 | this.dataType = SQLTokenizer.NULL; |
| 330 | else |
| 331 | if(newValue instanceof String) |
| 332 | this.dataType = SQLTokenizer.VARCHAR; |
| 333 | else |
| 334 | if(newValue instanceof Byte) |
| 335 | this.dataType = SQLTokenizer.TINYINT; |
| 336 | else |
| 337 | if(newValue instanceof Short) |
| 338 | this.dataType = SQLTokenizer.SMALLINT; |
| 339 | else |
| 340 | if(newValue instanceof Integer) |
| 341 | this.dataType = SQLTokenizer.INT; |
| 342 | else |
| 343 | if(newValue instanceof Long) |
| 344 | this.dataType = SQLTokenizer.BIGINT; |
| 345 | else |
| 346 | if(newValue instanceof Float) |
| 347 | this.dataType = SQLTokenizer.REAL; |
| 348 | else |
| 349 | if(newValue instanceof Double) |
| 350 | this.dataType = SQLTokenizer.DOUBLE; |
| 351 | else |
| 352 | if(newValue instanceof Number) |
| 353 | this.dataType = SQLTokenizer.DECIMAL; |
| 354 | else |
| 355 | if(newValue instanceof java.util.Date){ |
| 356 | DateTime dateTime; |
| 357 | this.value = dateTime = DateTime.valueOf((java.util.Date)newValue); |
| 358 | this.dataType = dateTime.getDataType(); |
| 359 | }else |
| 360 | if(newValue instanceof byte[]) |
| 361 | this.dataType = SQLTokenizer.VARBINARY; |
| 362 | else |
| 363 | if(newValue instanceof Boolean) |
| 364 | this.dataType = SQLTokenizer.BOOLEAN; |
| 365 | else |
| 366 | if(newValue instanceof Money) |
| 367 | this.dataType = SQLTokenizer.MONEY; |
| 368 | else |
| 369 | throw Utils.createSQLException("Unknown parameter class:" + newValue.getClass().getName()); |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | |
| 374 | final void set(ExpressionValue val){ |
| 375 | this.value = val.value; |
| 376 | this.dataType = val.dataType; |
| 377 | this.length = val.length; |
| 378 | } |
| 379 | /*============================================================================== |
| 380 | overriden abstact methods extends from expression |
| 381 | ==============================================================================*/ |
| 382 | |
| 383 | |
| 384 | boolean isNull(){ |
| 385 | return value == null; |
| 386 | } |
| 387 | |
| 388 | boolean getBoolean() throws Exception{ |
| 389 | return getBoolean( value, dataType ); |
| 390 | } |
| 391 | |
| 392 | static boolean getBoolean(Object obj, int dataType) throws Exception{ |
| 393 | if(obj == null) return false; |
| 394 | switch(dataType){ |
| 395 | case SQLTokenizer.BIT: |
| 396 | case SQLTokenizer.BOOLEAN: |
| 397 | return (obj.equals(Boolean.TRUE)); |
| 398 | case SQLTokenizer.TINYINT: |
| 399 | case SQLTokenizer.SMALLINT: |
| 400 | case SQLTokenizer.INT: |
| 401 | case SQLTokenizer.BIGINT: |
| 402 | return ((Number)obj).intValue() != 0; |
| 403 | case SQLTokenizer.REAL: |
| 404 | case SQLTokenizer.DOUBLE: |
| 405 | case SQLTokenizer.MONEY: |
| 406 | return ((Number)obj).doubleValue() != 0; |
| 407 | default: return Utils.string2boolean( obj.toString() ); |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | int getInt() throws Exception{ |
| 412 | return getInt( value, dataType ); |
| 413 | } |
| 414 | |
| 415 | static int getInt(Object obj, int dataType) throws Exception{ |
| 416 | if(obj == null) return 0; |
| 417 | switch(dataType){ |
| 418 | case SQLTokenizer.BIT: |
| 419 | case SQLTokenizer.BOOLEAN: |
| 420 | return (obj == Boolean.TRUE) ? 1 : 0; |
| 421 | case SQLTokenizer.TINYINT: |
| 422 | case SQLTokenizer.SMALLINT: |
| 423 | case SQLTokenizer.INT: |
| 424 | case SQLTokenizer.BIGINT: |
| 425 | case SQLTokenizer.REAL: |
| 426 | case SQLTokenizer.DOUBLE: |
| 427 | case SQLTokenizer.MONEY: |
| 428 | return ((Number)obj).intValue(); |
| 429 | case SQLTokenizer.TIMESTAMP: |
| 430 | case SQLTokenizer.TIME: |
| 431 | case SQLTokenizer.DATE: |
| 432 | case SQLTokenizer.SMALLDATETIME: |
| 433 | return (int)((DateTime)obj).getTimeMillis(); |
| 434 | default: |
| 435 | String str = obj.toString(); |
| 436 | try{ |
| 437 | return Integer.parseInt( str ); |
| 438 | }catch(Throwable th){} |
| 439 | return (int)Double.parseDouble( str ); |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | long getLong() throws Exception{ |
| 444 | return getLong(value, dataType); |
| 445 | } |
| 446 | |
| 447 | static long getLong(Object obj, int dataType) throws Exception{ |
| 448 | if(obj == null) return 0; |
| 449 | switch(dataType){ |
| 450 | case SQLTokenizer.BIT: |
| 451 | case SQLTokenizer.BOOLEAN: |
| 452 | return (obj == Boolean.TRUE) ? 1 : 0; |
| 453 | case SQLTokenizer.TINYINT: |
| 454 | case SQLTokenizer.SMALLINT: |
| 455 | case SQLTokenizer.INT: |
| 456 | case SQLTokenizer.BIGINT: |
| 457 | case SQLTokenizer.DOUBLE: |
| 458 | case SQLTokenizer.MONEY: |
| 459 | return ((Number)obj).longValue(); |
| 460 | case SQLTokenizer.TIMESTAMP: |
| 461 | case SQLTokenizer.TIME: |
| 462 | case SQLTokenizer.DATE: |
| 463 | case SQLTokenizer.SMALLDATETIME: |
| 464 | return ((DateTime)obj).getTimeMillis(); |
| 465 | default: |
| 466 | String str = obj.toString(); |
| 467 | if(str.indexOf('-') > 0 || str.indexOf(':') > 0) |
| 468 | return DateTime.parse(str); |
| 469 | try{ |
| 470 | return Long.parseLong( str ); |
| 471 | }catch(NumberFormatException e){ |
| 472 | return (long)Double.parseDouble( str ); |
| 473 | } |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | float getFloat() throws Exception{ |
| 478 | return getFloat( value, dataType); |
| 479 | } |
| 480 | |
| 481 | static float getFloat(Object obj, int dataType) throws Exception{ |
| 482 | if(obj == null) return 0; |
| 483 | switch(dataType){ |
| 484 | case SQLTokenizer.BIT: |
| 485 | return (obj.equals(Boolean.TRUE)) ? 1 : 0; |
| 486 | case SQLTokenizer.INT: |
| 487 | case SQLTokenizer.BIGINT: |
| 488 | case SQLTokenizer.DOUBLE: |
| 489 | case SQLTokenizer.FLOAT: |
| 490 | case SQLTokenizer.REAL: |
| 491 | case SQLTokenizer.MONEY: |
| 492 | return ((Number)obj).floatValue(); |
| 493 | case SQLTokenizer.TIMESTAMP: |
| 494 | case SQLTokenizer.TIME: |
| 495 | case SQLTokenizer.DATE: |
| 496 | case SQLTokenizer.SMALLDATETIME: |
| 497 | return ((DateTime)obj).getTimeMillis(); |
| 498 | default: return Float.parseFloat( obj.toString() ); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | double getDouble() throws Exception{ |
| 503 | return getDouble( value, dataType); |
| 504 | } |
| 505 | |
| 506 | static double getDouble(Object obj, int dataType) throws Exception{ |
| 507 | if(obj == null) return 0; |
| 508 | switch(dataType){ |
| 509 | case SQLTokenizer.BIT: |
| 510 | return (obj.equals(Boolean.TRUE)) ? 1 : 0; |
| 511 | case SQLTokenizer.INT: |
| 512 | case SQLTokenizer.BIGINT: |
| 513 | case SQLTokenizer.DOUBLE: |
| 514 | case SQLTokenizer.MONEY: |
| 515 | return ((Number)obj).doubleValue(); |
| 516 | case SQLTokenizer.TIMESTAMP: |
| 517 | case SQLTokenizer.TIME: |
| 518 | case SQLTokenizer.DATE: |
| 519 | case SQLTokenizer.SMALLDATETIME: |
| 520 | return ((DateTime)obj).getTimeMillis(); |
| 521 | default: return Double.parseDouble( obj.toString() ); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | |
| 526 | long getMoney() throws Exception{ |
| 527 | return getMoney( value, dataType ); |
| 528 | } |
| 529 | |
| 530 | |
| 531 | static long getMoney(Object obj, int dataType) throws Exception{ |
| 532 | if(obj == null) return 0; |
| 533 | switch(dataType){ |
| 534 | case SQLTokenizer.BIT: |
| 535 | return (obj == Boolean.TRUE) ? 10000 : 0; |
| 536 | case SQLTokenizer.TINYINT: |
| 537 | case SQLTokenizer.SMALLINT: |
| 538 | case SQLTokenizer.INT: |
| 539 | case SQLTokenizer.BIGINT: |
| 540 | return ((Number)obj).longValue() * 10000; |
| 541 | case SQLTokenizer.REAL: |
| 542 | case SQLTokenizer.FLOAT: |
| 543 | case SQLTokenizer.DOUBLE: |
| 544 | return Utils.doubleToMoney(((Number)obj).doubleValue()); |
| 545 | case SQLTokenizer.MONEY: |
| 546 | case SQLTokenizer.SMALLMONEY: |
| 547 | return ((Money)obj).value; |
| 548 | default: return Money.parseMoney( obj.toString() ); |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | |
| 553 | MutableNumeric getNumeric(){ |
| 554 | return getNumeric(value, dataType ); |
| 555 | } |
| 556 | |
| 557 | |
| 558 | static MutableNumeric getNumeric(Object obj, int dataType){ |
| 559 | if(obj == null) return null; |
| 560 | switch(dataType){ |
| 561 | case SQLTokenizer.BIT: |
| 562 | return new MutableNumeric( (obj == Boolean.TRUE) ? 1 : 0); |
| 563 | case SQLTokenizer.INT: |
| 564 | return new MutableNumeric( ((Number)obj).intValue() ); |
| 565 | case SQLTokenizer.BIGINT: |
| 566 | return new MutableNumeric( ((Number)obj).longValue() ); |
| 567 | case SQLTokenizer.REAL: |
| 568 | float fValue = ((Number)obj).floatValue(); |
| 569 | if(Float.isInfinite(fValue) || Float.isNaN(fValue)) |
| 570 | return null; |
| 571 | return new MutableNumeric( fValue ); |
| 572 | case SQLTokenizer.FLOAT: |
| 573 | case SQLTokenizer.DOUBLE: |
| 574 | double dValue = ((Number)obj).doubleValue(); |
| 575 | if(Double.isInfinite(dValue) || Double.isNaN(dValue)) |
| 576 | return null; |
| 577 | return new MutableNumeric( dValue ); |
| 578 | case SQLTokenizer.MONEY: |
| 579 | case SQLTokenizer.SMALLMONEY: |
| 580 | return new MutableNumeric( ((Money)obj).value, 4 ); |
| 581 | case SQLTokenizer.DECIMAL: |
| 582 | case SQLTokenizer.NUMERIC: |
| 583 | if(obj instanceof MutableNumeric) |
| 584 | return (MutableNumeric)obj; |
| 585 | return new MutableNumeric( (BigDecimal)obj ); |
| 586 | default: return new MutableNumeric( obj.toString() ); |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | |
| 591 | Object getObject(){ |
| 592 | return value; |
| 593 | } |
| 594 | |
| 595 | String getString(){ |
| 596 | if(value == null) return null; |
| 597 | if(dataType == SQLTokenizer.BIT){ |
| 598 | return (value == Boolean.TRUE) ? "1" : "0"; |
| 599 | } |
| 600 | return value.toString(); |
| 601 | } |
| 602 | |
| 603 | byte[] getBytes() throws Exception{ |
| 604 | return getBytes( value, dataType); |
| 605 | } |
| 606 | |
| 607 | |
| 608 | static byte[] getBytes(Object obj, int dataType) throws Exception{ |
| 609 | if(obj == null) return null; |
| 610 | switch(dataType){ |
| 611 | case SQLTokenizer.BINARY: |
| 612 | case SQLTokenizer.VARBINARY: |
| 613 | return (byte[])obj; |
| 614 | case SQLTokenizer.VARCHAR: |
| 615 | case SQLTokenizer.CHAR: |
| 616 | case SQLTokenizer.NVARCHAR: |
| 617 | case SQLTokenizer.NCHAR: |
| 618 | return ((String)obj).getBytes(); |
| 619 | case SQLTokenizer.INT: |
| 620 | return Utils.int2bytes( ((Number)obj).intValue() ); |
| 621 | case SQLTokenizer.UNIQUEIDENTIFIER: |
| 622 | return Utils.unique2bytes((String)obj); |
| 623 | default: throw createUnspportedConversion(dataType, obj, SQLTokenizer.VARBINARY); |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | |
| 628 | |
| 629 | final int getDataType(){ |
| 630 | return dataType; |
| 631 | } |
| 632 | |
| 633 | /*======================================================================= |
| 634 | |
| 635 | Methods for ResultSetMetaData |
| 636 | |
| 637 | =======================================================================*/ |
| 638 | |
| 639 | String getTableName(){ |
| 640 | return null; |
| 641 | } |
| 642 | |
| 643 | final int getPrecision(){ |
| 644 | switch(dataType){ |
| 645 | case SQLTokenizer.VARCHAR: |
| 646 | case SQLTokenizer.CHAR: |
| 647 | return ((String)value).length(); |
| 648 | case SQLTokenizer.VARBINARY: |
| 649 | case SQLTokenizer.BINARY: |
| 650 | return ((byte[])value).length; |
| 651 | default: |
| 652 | return super.getPrecision(); |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | |
| 657 | int getScale(){ |
| 658 | switch(dataType){ |
| 659 | case SQLTokenizer.DECIMAL: |
| 660 | case SQLTokenizer.NUMERIC: |
| 661 | MutableNumeric obj = getNumeric(); |
| 662 | return (obj == null) ? 0: obj.scale; |
| 663 | default: |
| 664 | return getScale(dataType); |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | |
| 669 | static SQLException createUnspportedConversion( int fromDataType, Object obj, int toDataType ){ |
| 670 | return Utils.createSQLException("Can't convert '" + |
| 671 | SQLTokenizer.getKeyWord(fromDataType) + |
| 672 | "' [" + obj + ']' + |
| 673 | "' to '" + |
| 674 | SQLTokenizer.getKeyWord(toDataType) + '\''); |
| 675 | } |
| 676 | |
| 677 | |
| 678 | } |