| 1 | /* |
| 2 | Copyright (C) 2002-2004 MySQL AB |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of version 2 of the GNU General Public License as |
| 6 | published by the Free Software Foundation. |
| 7 | |
| 8 | There are special exceptions to the terms and conditions of the GPL |
| 9 | as it is applied to this software. View the full text of the |
| 10 | exception in file EXCEPTIONS-CONNECTOR-J in the directory of this |
| 11 | software distribution. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | |
| 22 | |
| 23 | |
| 24 | */ |
| 25 | package com.mysql.jdbc; |
| 26 | |
| 27 | import java.io.ByteArrayInputStream; |
| 28 | import java.io.IOException; |
| 29 | import java.io.ObjectInputStream; |
| 30 | import java.sql.SQLException; |
| 31 | import java.sql.Types; |
| 32 | |
| 33 | /** |
| 34 | * A ResultSetMetaData object can be used to find out about the types and |
| 35 | * properties of the columns in a ResultSet |
| 36 | * |
| 37 | * @author Mark Matthews |
| 38 | * @version $Id: ResultSetMetaData.java,v 1.1.2.1 2005/05/13 18:58:38 mmatthews |
| 39 | * Exp $ |
| 40 | * |
| 41 | * @see java.sql.ResultSetMetaData |
| 42 | */ |
| 43 | public class ResultSetMetaData implements java.sql.ResultSetMetaData { |
| 44 | private static int clampedGetLength(Field f) { |
| 45 | long fieldLength = f.getLength(); |
| 46 | |
| 47 | if (fieldLength > Integer.MAX_VALUE) { |
| 48 | fieldLength = Integer.MAX_VALUE; |
| 49 | } |
| 50 | |
| 51 | return (int) fieldLength; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Checks if the SQL Type is a Decimal/Number Type |
| 56 | * |
| 57 | * @param type |
| 58 | * SQL Type |
| 59 | * |
| 60 | * @return ... |
| 61 | */ |
| 62 | private static final boolean isDecimalType(int type) { |
| 63 | switch (type) { |
| 64 | case Types.BIT: |
| 65 | case Types.TINYINT: |
| 66 | case Types.SMALLINT: |
| 67 | case Types.INTEGER: |
| 68 | case Types.BIGINT: |
| 69 | case Types.FLOAT: |
| 70 | case Types.REAL: |
| 71 | case Types.DOUBLE: |
| 72 | case Types.NUMERIC: |
| 73 | case Types.DECIMAL: |
| 74 | return true; |
| 75 | } |
| 76 | |
| 77 | return false; |
| 78 | } |
| 79 | |
| 80 | Field[] fields; |
| 81 | |
| 82 | /** |
| 83 | * Initialise for a result with a tuple set and a field descriptor set |
| 84 | * |
| 85 | * @param fields |
| 86 | * the array of field descriptors |
| 87 | */ |
| 88 | public ResultSetMetaData(Field[] fields) { |
| 89 | this.fields = fields; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * What's a column's table's catalog name? |
| 94 | * |
| 95 | * @param column |
| 96 | * the first column is 1, the second is 2... |
| 97 | * |
| 98 | * @return catalog name, or "" if not applicable |
| 99 | * |
| 100 | * @throws SQLException |
| 101 | * if a database access error occurs |
| 102 | */ |
| 103 | public String getCatalogName(int column) throws SQLException { |
| 104 | Field f = getField(column); |
| 105 | |
| 106 | String database = f.getDatabaseName(); |
| 107 | |
| 108 | return (database == null) ? "" : database; //$NON-NLS-1$ |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * What's the Java character encoding name for the given column? |
| 113 | * |
| 114 | * @param column |
| 115 | * the first column is 1, the second is 2, etc. |
| 116 | * |
| 117 | * @return the Java character encoding name for the given column, or null if |
| 118 | * no Java character encoding maps to the MySQL character set for |
| 119 | * the given column. |
| 120 | * |
| 121 | * @throws SQLException |
| 122 | * if an invalid column index is given. |
| 123 | */ |
| 124 | public String getColumnCharacterEncoding(int column) throws SQLException { |
| 125 | String mysqlName = getColumnCharacterSet(column); |
| 126 | |
| 127 | String javaName = null; |
| 128 | |
| 129 | if (mysqlName != null) { |
| 130 | javaName = CharsetMapping.getJavaEncodingForMysqlEncoding( |
| 131 | mysqlName, null); |
| 132 | } |
| 133 | |
| 134 | return javaName; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * What's the MySQL character set name for the given column? |
| 139 | * |
| 140 | * @param column |
| 141 | * the first column is 1, the second is 2, etc. |
| 142 | * |
| 143 | * @return the MySQL character set name for the given column |
| 144 | * |
| 145 | * @throws SQLException |
| 146 | * if an invalid column index is given. |
| 147 | */ |
| 148 | public String getColumnCharacterSet(int column) throws SQLException { |
| 149 | return getField(column).getCharacterSet(); |
| 150 | } |
| 151 | |
| 152 | // --------------------------JDBC 2.0----------------------------------- |
| 153 | |
| 154 | /** |
| 155 | * JDBC 2.0 |
| 156 | * |
| 157 | * <p> |
| 158 | * Return the fully qualified name of the Java class whose instances are |
| 159 | * manufactured if ResultSet.getObject() is called to retrieve a value from |
| 160 | * the column. ResultSet.getObject() may return a subClass of the class |
| 161 | * returned by this method. |
| 162 | * </p> |
| 163 | * |
| 164 | * @param column |
| 165 | * the column number to retrieve information for |
| 166 | * |
| 167 | * @return the fully qualified name of the Java class whose instances are |
| 168 | * manufactured if ResultSet.getObject() is called to retrieve a |
| 169 | * value from the column. |
| 170 | * |
| 171 | * @throws SQLException |
| 172 | * if an error occurs |
| 173 | */ |
| 174 | public String getColumnClassName(int column) throws SQLException { |
| 175 | Field f = getField(column); |
| 176 | |
| 177 | return getClassNameForJavaType(f.getSQLType(), |
| 178 | f.isUnsigned(), |
| 179 | f.getMysqlType(), |
| 180 | f.isBinary() || f.isBlob(), |
| 181 | f.isOpaqueBinary()); |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Whats the number of columns in the ResultSet? |
| 186 | * |
| 187 | * @return the number |
| 188 | * |
| 189 | * @throws SQLException |
| 190 | * if a database access error occurs |
| 191 | */ |
| 192 | public int getColumnCount() throws SQLException { |
| 193 | return this.fields.length; |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * What is the column's normal maximum width in characters? |
| 198 | * |
| 199 | * @param column |
| 200 | * the first column is 1, the second is 2, etc. |
| 201 | * |
| 202 | * @return the maximum width |
| 203 | * |
| 204 | * @throws SQLException |
| 205 | * if a database access error occurs |
| 206 | */ |
| 207 | public int getColumnDisplaySize(int column) throws SQLException { |
| 208 | Field f = getField(column); |
| 209 | |
| 210 | int lengthInBytes = clampedGetLength(f); |
| 211 | |
| 212 | return lengthInBytes / f.getMaxBytesPerCharacter(); |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * What is the suggested column title for use in printouts and displays? |
| 217 | * |
| 218 | * @param column |
| 219 | * the first column is 1, the second is 2, etc. |
| 220 | * |
| 221 | * @return the column label |
| 222 | * |
| 223 | * @throws SQLException |
| 224 | * if a database access error occurs |
| 225 | */ |
| 226 | public String getColumnLabel(int column) throws SQLException { |
| 227 | return getField(column).getColumnLabel(); |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * What's a column's name? |
| 232 | * |
| 233 | * @param column |
| 234 | * the first column is 1, the second is 2, etc. |
| 235 | * |
| 236 | * @return the column name |
| 237 | * |
| 238 | * @throws SQLException |
| 239 | * if a databvase access error occurs |
| 240 | */ |
| 241 | public String getColumnName(int column) throws SQLException { |
| 242 | return getField(column).getNameNoAliases(); |
| 243 | } |
| 244 | |
| 245 | /** |
| 246 | * What is a column's SQL Type? (java.sql.Type int) |
| 247 | * |
| 248 | * @param column |
| 249 | * the first column is 1, the second is 2, etc. |
| 250 | * |
| 251 | * @return the java.sql.Type value |
| 252 | * |
| 253 | * @throws SQLException |
| 254 | * if a database access error occurs |
| 255 | * |
| 256 | * @see java.sql.Types |
| 257 | */ |
| 258 | public int getColumnType(int column) throws SQLException { |
| 259 | return getField(column).getSQLType(); |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * Whats is the column's data source specific type name? |
| 264 | * |
| 265 | * @param column |
| 266 | * the first column is 1, the second is 2, etc. |
| 267 | * |
| 268 | * @return the type name |
| 269 | * |
| 270 | * @throws SQLException |
| 271 | * if a database access error occurs |
| 272 | */ |
| 273 | public String getColumnTypeName(int column) throws java.sql.SQLException { |
| 274 | Field field = getField(column); |
| 275 | |
| 276 | int mysqlType = field.getMysqlType(); |
| 277 | int jdbcType = field.getSQLType(); |
| 278 | |
| 279 | switch (mysqlType) { |
| 280 | case MysqlDefs.FIELD_TYPE_BIT: |
| 281 | return "BIT"; |
| 282 | case MysqlDefs.FIELD_TYPE_DECIMAL: |
| 283 | case MysqlDefs.FIELD_TYPE_NEW_DECIMAL: |
| 284 | return field.isUnsigned() ? "DECIMAL UNSIGNED" : "DECIMAL"; |
| 285 | |
| 286 | case MysqlDefs.FIELD_TYPE_TINY: |
| 287 | return field.isUnsigned() ? "TINYINT UNSIGNED" : "TINYINT"; |
| 288 | |
| 289 | case MysqlDefs.FIELD_TYPE_SHORT: |
| 290 | return field.isUnsigned() ? "SMALLINT UNSIGNED" : "SMALLINT"; |
| 291 | |
| 292 | case MysqlDefs.FIELD_TYPE_LONG: |
| 293 | return field.isUnsigned() ? "INTEGER UNSIGNED" : "INTEGER"; |
| 294 | |
| 295 | case MysqlDefs.FIELD_TYPE_FLOAT: |
| 296 | return field.isUnsigned() ? "FLOAT UNSIGNED" : "FLOAT"; |
| 297 | |
| 298 | case MysqlDefs.FIELD_TYPE_DOUBLE: |
| 299 | return field.isUnsigned() ? "DOUBLE UNSIGNED" : "DOUBLE"; |
| 300 | |
| 301 | case MysqlDefs.FIELD_TYPE_NULL: |
| 302 | return "NULL"; //$NON-NLS-1$ |
| 303 | |
| 304 | case MysqlDefs.FIELD_TYPE_TIMESTAMP: |
| 305 | return "TIMESTAMP"; //$NON-NLS-1$ |
| 306 | |
| 307 | case MysqlDefs.FIELD_TYPE_LONGLONG: |
| 308 | return field.isUnsigned() ? "BIGINT UNSIGNED" : "BIGINT"; |
| 309 | |
| 310 | case MysqlDefs.FIELD_TYPE_INT24: |
| 311 | return field.isUnsigned() ? "MEDIUMINT UNSIGNED" : "MEDIUMINT"; |
| 312 | |
| 313 | case MysqlDefs.FIELD_TYPE_DATE: |
| 314 | return "DATE"; //$NON-NLS-1$ |
| 315 | |
| 316 | case MysqlDefs.FIELD_TYPE_TIME: |
| 317 | return "TIME"; //$NON-NLS-1$ |
| 318 | |
| 319 | case MysqlDefs.FIELD_TYPE_DATETIME: |
| 320 | return "DATETIME"; //$NON-NLS-1$ |
| 321 | |
| 322 | case MysqlDefs.FIELD_TYPE_TINY_BLOB: |
| 323 | return "TINYBLOB"; //$NON-NLS-1$ |
| 324 | |
| 325 | case MysqlDefs.FIELD_TYPE_MEDIUM_BLOB: |
| 326 | return "MEDIUMBLOB"; //$NON-NLS-1$ |
| 327 | |
| 328 | case MysqlDefs.FIELD_TYPE_LONG_BLOB: |
| 329 | return "LONGBLOB"; //$NON-NLS-1$ |
| 330 | |
| 331 | case MysqlDefs.FIELD_TYPE_BLOB: |
| 332 | if (getField(column).isBinary()) { |
| 333 | return "BLOB";//$NON-NLS-1$ |
| 334 | } |
| 335 | |
| 336 | return "TEXT";//$NON-NLS-1$ |
| 337 | |
| 338 | case MysqlDefs.FIELD_TYPE_VARCHAR: |
| 339 | return "VARCHAR"; //$NON-NLS-1$ |
| 340 | |
| 341 | case MysqlDefs.FIELD_TYPE_VAR_STRING: |
| 342 | if (jdbcType == Types.VARBINARY) { |
| 343 | return "VARBINARY"; |
| 344 | } |
| 345 | |
| 346 | return "VARCHAR"; //$NON-NLS-1$ |
| 347 | |
| 348 | case MysqlDefs.FIELD_TYPE_STRING: |
| 349 | if (jdbcType == Types.BINARY) { |
| 350 | return "BINARY"; |
| 351 | } |
| 352 | |
| 353 | return "CHAR"; //$NON-NLS-1$ |
| 354 | |
| 355 | case MysqlDefs.FIELD_TYPE_ENUM: |
| 356 | return "ENUM"; //$NON-NLS-1$ |
| 357 | |
| 358 | case MysqlDefs.FIELD_TYPE_YEAR: |
| 359 | return "YEAR"; // $NON_NLS-1$ |
| 360 | |
| 361 | case MysqlDefs.FIELD_TYPE_SET: |
| 362 | return "SET"; //$NON-NLS-1$ |
| 363 | |
| 364 | default: |
| 365 | return "UNKNOWN"; //$NON-NLS-1$ |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | /** |
| 370 | * Returns the field instance for the given column index |
| 371 | * |
| 372 | * @param columnIndex |
| 373 | * the column number to retrieve a field instance for |
| 374 | * |
| 375 | * @return the field instance for the given column index |
| 376 | * |
| 377 | * @throws SQLException |
| 378 | * if an error occurs |
| 379 | */ |
| 380 | protected Field getField(int columnIndex) throws SQLException { |
| 381 | if ((columnIndex < 1) || (columnIndex > this.fields.length)) { |
| 382 | throw SQLError.createSQLException(Messages.getString("ResultSetMetaData.46"), //$NON-NLS-1$ |
| 383 | SQLError.SQL_STATE_INVALID_COLUMN_NUMBER); |
| 384 | } |
| 385 | |
| 386 | return this.fields[columnIndex - 1]; |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * What is a column's number of decimal digits. |
| 391 | * |
| 392 | * @param column |
| 393 | * the first column is 1, the second is 2... |
| 394 | * |
| 395 | * @return the precision |
| 396 | * |
| 397 | * @throws SQLException |
| 398 | * if a database access error occurs |
| 399 | */ |
| 400 | public int getPrecision(int column) throws SQLException { |
| 401 | Field f = getField(column); |
| 402 | |
| 403 | // if (f.getMysqlType() == MysqlDefs.FIELD_TYPE_NEW_DECIMAL) { |
| 404 | // return f.getLength(); |
| 405 | // } |
| 406 | |
| 407 | if (isDecimalType(f.getSQLType())) { |
| 408 | if (f.getDecimals() > 0) { |
| 409 | return clampedGetLength(f) - 1 + f.getPrecisionAdjustFactor(); |
| 410 | } |
| 411 | |
| 412 | return clampedGetLength(f) + f.getPrecisionAdjustFactor(); |
| 413 | } |
| 414 | |
| 415 | switch (f.getMysqlType()) { |
| 416 | case MysqlDefs.FIELD_TYPE_TINY_BLOB: |
| 417 | case MysqlDefs.FIELD_TYPE_BLOB: |
| 418 | case MysqlDefs.FIELD_TYPE_MEDIUM_BLOB: |
| 419 | case MysqlDefs.FIELD_TYPE_LONG_BLOB: |
| 420 | return clampedGetLength(f); // this may change in the future |
| 421 | // for now, the server only |
| 422 | // returns FIELD_TYPE_BLOB for _all_ |
| 423 | // BLOB types, but varying lengths |
| 424 | // indicating the _maximum_ size |
| 425 | // for each BLOB type. |
| 426 | default: |
| 427 | return clampedGetLength(f) / f.getMaxBytesPerCharacter(); |
| 428 | |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * What is a column's number of digits to the right of the decimal point? |
| 434 | * |
| 435 | * @param column |
| 436 | * the first column is 1, the second is 2... |
| 437 | * |
| 438 | * @return the scale |
| 439 | * |
| 440 | * @throws SQLException |
| 441 | * if a database access error occurs |
| 442 | */ |
| 443 | public int getScale(int column) throws SQLException { |
| 444 | Field f = getField(column); |
| 445 | |
| 446 | if (isDecimalType(f.getSQLType())) { |
| 447 | return f.getDecimals(); |
| 448 | } |
| 449 | |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * What is a column's table's schema? This relies on us knowing the table |
| 455 | * name. The JDBC specification allows us to return "" if this is not |
| 456 | * applicable. |
| 457 | * |
| 458 | * @param column |
| 459 | * the first column is 1, the second is 2... |
| 460 | * |
| 461 | * @return the Schema |
| 462 | * |
| 463 | * @throws SQLException |
| 464 | * if a database access error occurs |
| 465 | */ |
| 466 | public String getSchemaName(int column) throws SQLException { |
| 467 | return ""; //$NON-NLS-1$ |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * Whats a column's table's name? |
| 472 | * |
| 473 | * @param column |
| 474 | * the first column is 1, the second is 2... |
| 475 | * |
| 476 | * @return column name, or "" if not applicable |
| 477 | * |
| 478 | * @throws SQLException |
| 479 | * if a database access error occurs |
| 480 | */ |
| 481 | public String getTableName(int column) throws SQLException { |
| 482 | return getField(column).getTableNameNoAliases(); |
| 483 | } |
| 484 | |
| 485 | /** |
| 486 | * Is the column automatically numbered (and thus read-only) |
| 487 | * |
| 488 | * @param column |
| 489 | * the first column is 1, the second is 2... |
| 490 | * |
| 491 | * @return true if so |
| 492 | * |
| 493 | * @throws SQLException |
| 494 | * if a database access error occurs |
| 495 | */ |
| 496 | public boolean isAutoIncrement(int column) throws SQLException { |
| 497 | Field f = getField(column); |
| 498 | |
| 499 | return f.isAutoIncrement(); |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * Does a column's case matter? |
| 504 | * |
| 505 | * @param column |
| 506 | * the first column is 1, the second is 2... |
| 507 | * |
| 508 | * @return true if so |
| 509 | * |
| 510 | * @throws java.sql.SQLException |
| 511 | * if a database access error occurs |
| 512 | */ |
| 513 | public boolean isCaseSensitive(int column) throws java.sql.SQLException { |
| 514 | Field field = getField(column); |
| 515 | |
| 516 | int sqlType = field.getSQLType(); |
| 517 | |
| 518 | switch (sqlType) { |
| 519 | case Types.BIT: |
| 520 | case Types.TINYINT: |
| 521 | case Types.SMALLINT: |
| 522 | case Types.INTEGER: |
| 523 | case Types.BIGINT: |
| 524 | case Types.FLOAT: |
| 525 | case Types.REAL: |
| 526 | case Types.DOUBLE: |
| 527 | case Types.DATE: |
| 528 | case Types.TIME: |
| 529 | case Types.TIMESTAMP: |
| 530 | return false; |
| 531 | |
| 532 | case Types.CHAR: |
| 533 | case Types.VARCHAR: |
| 534 | case Types.LONGVARCHAR: |
| 535 | |
| 536 | if (field.isBinary()) { |
| 537 | return true; |
| 538 | } |
| 539 | |
| 540 | String collationName = field.getCollation(); |
| 541 | |
| 542 | return ((collationName != null) && !collationName.endsWith("_ci")); |
| 543 | |
| 544 | default: |
| 545 | return true; |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | /** |
| 550 | * Is the column a cash value? |
| 551 | * |
| 552 | * @param column |
| 553 | * the first column is 1, the second is 2... |
| 554 | * |
| 555 | * @return true if its a cash column |
| 556 | * |
| 557 | * @throws SQLException |
| 558 | * if a database access error occurs |
| 559 | */ |
| 560 | public boolean isCurrency(int column) throws SQLException { |
| 561 | return false; |
| 562 | } |
| 563 | |
| 564 | /** |
| 565 | * Will a write on this column definately succeed? |
| 566 | * |
| 567 | * @param column |
| 568 | * the first column is 1, the second is 2, etc.. |
| 569 | * |
| 570 | * @return true if so |
| 571 | * |
| 572 | * @throws SQLException |
| 573 | * if a database access error occurs |
| 574 | */ |
| 575 | public boolean isDefinitelyWritable(int column) throws SQLException { |
| 576 | return isWritable(column); |
| 577 | } |
| 578 | |
| 579 | /** |
| 580 | * Can you put a NULL in this column? |
| 581 | * |
| 582 | * @param column |
| 583 | * the first column is 1, the second is 2... |
| 584 | * |
| 585 | * @return one of the columnNullable values |
| 586 | * |
| 587 | * @throws SQLException |
| 588 | * if a database access error occurs |
| 589 | */ |
| 590 | public int isNullable(int column) throws SQLException { |
| 591 | if (!getField(column).isNotNull()) { |
| 592 | return java.sql.ResultSetMetaData.columnNullable; |
| 593 | } |
| 594 | |
| 595 | return java.sql.ResultSetMetaData.columnNoNulls; |
| 596 | } |
| 597 | |
| 598 | /** |
| 599 | * Is the column definitely not writable? |
| 600 | * |
| 601 | * @param column |
| 602 | * the first column is 1, the second is 2, etc. |
| 603 | * |
| 604 | * @return true if so |
| 605 | * |
| 606 | * @throws SQLException |
| 607 | * if a database access error occurs |
| 608 | */ |
| 609 | public boolean isReadOnly(int column) throws SQLException { |
| 610 | return getField(column).isReadOnly(); |
| 611 | } |
| 612 | |
| 613 | /** |
| 614 | * Can the column be used in a WHERE clause? Basically for this, I split the |
| 615 | * functions into two types: recognised types (which are always useable), |
| 616 | * and OTHER types (which may or may not be useable). The OTHER types, for |
| 617 | * now, I will assume they are useable. We should really query the catalog |
| 618 | * to see if they are useable. |
| 619 | * |
| 620 | * @param column |
| 621 | * the first column is 1, the second is 2... |
| 622 | * |
| 623 | * @return true if they can be used in a WHERE clause |
| 624 | * |
| 625 | * @throws SQLException |
| 626 | * if a database access error occurs |
| 627 | */ |
| 628 | public boolean isSearchable(int column) throws SQLException { |
| 629 | return true; |
| 630 | } |
| 631 | |
| 632 | /** |
| 633 | * Is the column a signed number? |
| 634 | * |
| 635 | * @param column |
| 636 | * the first column is 1, the second is 2... |
| 637 | * |
| 638 | * @return true if so |
| 639 | * |
| 640 | * @throws SQLException |
| 641 | * if a database access error occurs |
| 642 | */ |
| 643 | public boolean isSigned(int column) throws SQLException { |
| 644 | Field f = getField(column); |
| 645 | int sqlType = f.getSQLType(); |
| 646 | |
| 647 | switch (sqlType) { |
| 648 | case Types.TINYINT: |
| 649 | case Types.SMALLINT: |
| 650 | case Types.INTEGER: |
| 651 | case Types.BIGINT: |
| 652 | case Types.FLOAT: |
| 653 | case Types.REAL: |
| 654 | case Types.DOUBLE: |
| 655 | case Types.NUMERIC: |
| 656 | case Types.DECIMAL: |
| 657 | return !f.isUnsigned(); |
| 658 | |
| 659 | case Types.DATE: |
| 660 | case Types.TIME: |
| 661 | case Types.TIMESTAMP: |
| 662 | return false; |
| 663 | |
| 664 | default: |
| 665 | return false; |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | /** |
| 670 | * Is it possible for a write on the column to succeed? |
| 671 | * |
| 672 | * @param column |
| 673 | * the first column is 1, the second is 2, etc. |
| 674 | * |
| 675 | * @return true if so |
| 676 | * |
| 677 | * @throws SQLException |
| 678 | * if a database access error occurs |
| 679 | */ |
| 680 | public boolean isWritable(int column) throws SQLException { |
| 681 | return !isReadOnly(column); |
| 682 | } |
| 683 | |
| 684 | /** |
| 685 | * Returns a string representation of this object |
| 686 | * |
| 687 | * @return ... |
| 688 | */ |
| 689 | public String toString() { |
| 690 | StringBuffer toStringBuf = new StringBuffer(); |
| 691 | toStringBuf.append(super.toString()); |
| 692 | toStringBuf.append(" - Field level information: "); //$NON-NLS-1$ |
| 693 | |
| 694 | for (int i = 0; i < this.fields.length; i++) { |
| 695 | toStringBuf.append("\n\t"); //$NON-NLS-1$ |
| 696 | toStringBuf.append(this.fields[i].toString()); |
| 697 | } |
| 698 | |
| 699 | return toStringBuf.toString(); |
| 700 | } |
| 701 | |
| 702 | static String getClassNameForJavaType(int javaType, |
| 703 | boolean isUnsigned, int mysqlTypeIfKnown, |
| 704 | boolean isBinaryOrBlob, |
| 705 | boolean isOpaqueBinary) { |
| 706 | switch (javaType) { |
| 707 | case Types.BIT: |
| 708 | case Types.BOOLEAN: |
| 709 | return "java.lang.Boolean"; //$NON-NLS-1$ |
| 710 | |
| 711 | case Types.TINYINT: |
| 712 | |
| 713 | if (isUnsigned) { |
| 714 | return "java.lang.Integer"; //$NON-NLS-1$ |
| 715 | } |
| 716 | |
| 717 | return "java.lang.Integer"; //$NON-NLS-1$ |
| 718 | |
| 719 | case Types.SMALLINT: |
| 720 | |
| 721 | if (isUnsigned) { |
| 722 | return "java.lang.Integer"; //$NON-NLS-1$ |
| 723 | } |
| 724 | |
| 725 | return "java.lang.Integer"; //$NON-NLS-1$ |
| 726 | |
| 727 | case Types.INTEGER: |
| 728 | |
| 729 | if (!isUnsigned || |
| 730 | mysqlTypeIfKnown == MysqlDefs.FIELD_TYPE_INT24) { |
| 731 | return "java.lang.Integer"; //$NON-NLS-1$ |
| 732 | } |
| 733 | |
| 734 | return "java.lang.Long"; //$NON-NLS-1$ |
| 735 | |
| 736 | case Types.BIGINT: |
| 737 | |
| 738 | if (!isUnsigned) { |
| 739 | return "java.lang.Long"; //$NON-NLS-1$ |
| 740 | } |
| 741 | |
| 742 | return "java.math.BigInteger"; //$NON-NLS-1$ |
| 743 | |
| 744 | case Types.DECIMAL: |
| 745 | case Types.NUMERIC: |
| 746 | return "java.math.BigDecimal"; //$NON-NLS-1$ |
| 747 | |
| 748 | case Types.REAL: |
| 749 | return "java.lang.Float"; //$NON-NLS-1$ |
| 750 | |
| 751 | case Types.FLOAT: |
| 752 | case Types.DOUBLE: |
| 753 | return "java.lang.Double"; //$NON-NLS-1$ |
| 754 | |
| 755 | case Types.CHAR: |
| 756 | case Types.VARCHAR: |
| 757 | case Types.LONGVARCHAR: |
| 758 | if (!isOpaqueBinary) { |
| 759 | return "java.lang.String"; //$NON-NLS-1$ |
| 760 | } |
| 761 | |
| 762 | return "[B"; |
| 763 | |
| 764 | case Types.BINARY: |
| 765 | case Types.VARBINARY: |
| 766 | case Types.LONGVARBINARY: |
| 767 | |
| 768 | if (mysqlTypeIfKnown == MysqlDefs.FIELD_TYPE_GEOMETRY) { |
| 769 | return "[B"; |
| 770 | } else if (isBinaryOrBlob) { |
| 771 | return "[B"; |
| 772 | } else { |
| 773 | return "java.lang.String"; |
| 774 | } |
| 775 | |
| 776 | case Types.DATE: |
| 777 | return "java.sql.Date"; //$NON-NLS-1$ |
| 778 | |
| 779 | case Types.TIME: |
| 780 | return "java.sql.Time"; //$NON-NLS-1$ |
| 781 | |
| 782 | case Types.TIMESTAMP: |
| 783 | return "java.sql.Timestamp"; //$NON-NLS-1$ |
| 784 | |
| 785 | default: |
| 786 | return "java.lang.Object"; //$NON-NLS-1$ |
| 787 | } |
| 788 | } |
| 789 | } |