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 | |
26 | /** |
27 | * EscapeProcessor performs all escape code processing as outlined in the JDBC |
28 | * spec by JavaSoft. |
29 | */ |
30 | package com.mysql.jdbc; |
31 | |
32 | import java.sql.SQLException; |
33 | import java.sql.Time; |
34 | import java.sql.Timestamp; |
35 | |
36 | import java.util.Calendar; |
37 | import java.util.Collections; |
38 | import java.util.GregorianCalendar; |
39 | import java.util.HashMap; |
40 | import java.util.Locale; |
41 | import java.util.Map; |
42 | import java.util.StringTokenizer; |
43 | import java.util.TimeZone; |
44 | |
45 | class EscapeProcessor { |
46 | private static Map JDBC_CONVERT_TO_MYSQL_TYPE_MAP; |
47 | |
48 | private static Map JDBC_NO_CONVERT_TO_MYSQL_EXPRESSION_MAP; |
49 | |
50 | static { |
51 | Map tempMap = new HashMap(); |
52 | |
53 | tempMap.put("BIGINT", "0 + ?"); |
54 | tempMap.put("BINARY", "BINARY"); |
55 | tempMap.put("BIT", "0 + ?"); |
56 | tempMap.put("CHAR", "CHAR"); |
57 | tempMap.put("DATE", "DATE"); |
58 | tempMap.put("DECIMAL", "0.0 + ?"); |
59 | tempMap.put("DOUBLE", "0.0 + ?"); |
60 | tempMap.put("FLOAT", "0.0 + ?"); |
61 | tempMap.put("INTEGER", "0 + ?"); |
62 | tempMap.put("LONGVARBINARY", "BINARY"); |
63 | tempMap.put("LONGVARCHAR", "CONCAT(?)"); |
64 | tempMap.put("REAL", "0.0 + ?"); |
65 | tempMap.put("SMALLINT", "CONCAT(?)"); |
66 | tempMap.put("TIME", "TIME"); |
67 | tempMap.put("TIMESTAMP", "DATETIME"); |
68 | tempMap.put("TINYINT", "CONCAT(?)"); |
69 | tempMap.put("VARBINARY", "BINARY"); |
70 | tempMap.put("VARCHAR", "CONCAT(?)"); |
71 | |
72 | JDBC_CONVERT_TO_MYSQL_TYPE_MAP = Collections.unmodifiableMap(tempMap); |
73 | |
74 | tempMap = new HashMap(JDBC_CONVERT_TO_MYSQL_TYPE_MAP); |
75 | |
76 | tempMap.put("BINARY", "CONCAT(?)"); |
77 | tempMap.put("CHAR", "CONCAT(?)"); |
78 | tempMap.remove("DATE"); |
79 | tempMap.put("LONGVARBINARY", "CONCAT(?)"); |
80 | tempMap.remove("TIME"); |
81 | tempMap.remove("TIMESTAMP"); |
82 | tempMap.put("VARBINARY", "CONCAT(?)"); |
83 | |
84 | JDBC_NO_CONVERT_TO_MYSQL_EXPRESSION_MAP = Collections |
85 | .unmodifiableMap(tempMap); |
86 | |
87 | } |
88 | |
89 | /** |
90 | * Escape process one string |
91 | * |
92 | * @param sql |
93 | * the SQL to escape process. |
94 | * |
95 | * @return the SQL after it has been escape processed. |
96 | * |
97 | * @throws java.sql.SQLException |
98 | * DOCUMENT ME! |
99 | * @throws SQLException |
100 | * DOCUMENT ME! |
101 | */ |
102 | public static final Object escapeSQL(String sql, |
103 | boolean serverSupportsConvertFn, |
104 | Connection conn) throws java.sql.SQLException { |
105 | boolean replaceEscapeSequence = false; |
106 | String escapeSequence = null; |
107 | |
108 | if (sql == null) { |
109 | return null; |
110 | } |
111 | |
112 | /* |
113 | * Short circuit this code if we don't have a matching pair of "{}". - |
114 | * Suggested by Ryan Gustafason |
115 | */ |
116 | int beginBrace = sql.indexOf('{'); |
117 | int nextEndBrace = (beginBrace == -1) ? (-1) : sql.indexOf('}', |
118 | beginBrace); |
119 | |
120 | if (nextEndBrace == -1) { |
121 | return sql; |
122 | } |
123 | |
124 | StringBuffer newSql = new StringBuffer(); |
125 | |
126 | EscapeTokenizer escapeTokenizer = new EscapeTokenizer(sql); |
127 | |
128 | byte usesVariables = Statement.USES_VARIABLES_FALSE; |
129 | boolean callingStoredFunction = false; |
130 | |
131 | while (escapeTokenizer.hasMoreTokens()) { |
132 | String token = escapeTokenizer.nextToken(); |
133 | |
134 | if (token.length() != 0) { |
135 | if (token.charAt(0) == '{') { // It's an escape code |
136 | |
137 | if (!token.endsWith("}")) { |
138 | throw SQLError.createSQLException("Not a valid escape sequence: " |
139 | + token); |
140 | } |
141 | |
142 | if (token.length() > 2) { |
143 | int nestedBrace = token.indexOf('{', 2); |
144 | |
145 | if (nestedBrace != -1) { |
146 | StringBuffer buf = new StringBuffer(token |
147 | .substring(0, 1)); |
148 | |
149 | Object remainingResults = escapeSQL(token |
150 | .substring(1, token.length() - 1), |
151 | serverSupportsConvertFn, conn); |
152 | |
153 | String remaining = null; |
154 | |
155 | if (remainingResults instanceof String) { |
156 | remaining = (String) remainingResults; |
157 | } else { |
158 | remaining = ((EscapeProcessorResult) remainingResults).escapedSql; |
159 | |
160 | if (usesVariables != Statement.USES_VARIABLES_TRUE) { |
161 | usesVariables = ((EscapeProcessorResult) remainingResults).usesVariables; |
162 | } |
163 | } |
164 | |
165 | buf.append(remaining); |
166 | |
167 | buf.append('}'); |
168 | |
169 | token = buf.toString(); |
170 | } |
171 | } |
172 | |
173 | // nested escape code |
174 | // Compare to tokens with _no_ whitespace |
175 | String collapsedToken = removeWhitespace(token); |
176 | |
177 | /* |
178 | * Process the escape code |
179 | */ |
180 | if (StringUtils.startsWithIgnoreCase(collapsedToken, |
181 | "{escape")) { |
182 | try { |
183 | StringTokenizer st = new StringTokenizer(token, |
184 | " '"); |
185 | st.nextToken(); // eat the "escape" token |
186 | escapeSequence = st.nextToken(); |
187 | |
188 | if (escapeSequence.length() < 3) { |
189 | throw SQLError.createSQLException( |
190 | "Syntax error for escape sequence '" |
191 | + token + "'", "42000"); |
192 | } |
193 | |
194 | escapeSequence = escapeSequence.substring(1, |
195 | escapeSequence.length() - 1); |
196 | replaceEscapeSequence = true; |
197 | } catch (java.util.NoSuchElementException e) { |
198 | throw SQLError.createSQLException( |
199 | "Syntax error for escape sequence '" |
200 | + token + "'", "42000"); |
201 | } |
202 | } else if (StringUtils.startsWithIgnoreCase(collapsedToken, |
203 | "{fn")) { |
204 | int startPos = token.toLowerCase().indexOf("fn ") + 3; |
205 | int endPos = token.length() - 1; // no } |
206 | |
207 | String fnToken = token.substring(startPos, endPos); |
208 | |
209 | // We need to handle 'convert' by ourselves |
210 | |
211 | if (StringUtils.startsWithIgnoreCaseAndWs(fnToken, |
212 | "convert")) { |
213 | newSql.append(processConvertToken(fnToken, |
214 | serverSupportsConvertFn)); |
215 | } else { |
216 | // just pass functions right to the DB |
217 | newSql.append(fnToken); |
218 | } |
219 | } else if (StringUtils.startsWithIgnoreCase(collapsedToken, |
220 | "{d")) { |
221 | int startPos = token.indexOf('\'') + 1; |
222 | int endPos = token.lastIndexOf('\''); // no } |
223 | |
224 | if ((startPos == -1) || (endPos == -1)) { |
225 | throw SQLError.createSQLException( |
226 | "Syntax error for DATE escape sequence '" |
227 | + token + "'", "42000"); |
228 | } |
229 | |
230 | String argument = token.substring(startPos, endPos); |
231 | |
232 | try { |
233 | StringTokenizer st = new StringTokenizer(argument, |
234 | " -"); |
235 | String year4 = st.nextToken(); |
236 | String month2 = st.nextToken(); |
237 | String day2 = st.nextToken(); |
238 | String dateString = "'" + year4 + "-" + month2 |
239 | + "-" + day2 + "'"; |
240 | newSql.append(dateString); |
241 | } catch (java.util.NoSuchElementException e) { |
242 | throw SQLError.createSQLException( |
243 | "Syntax error for DATE escape sequence '" |
244 | + argument + "'", "42000"); |
245 | } |
246 | } else if (StringUtils.startsWithIgnoreCase(collapsedToken, |
247 | "{ts")) { |
248 | int startPos = token.indexOf('\'') + 1; |
249 | int endPos = token.lastIndexOf('\''); // no } |
250 | |
251 | if ((startPos == -1) || (endPos == -1)) { |
252 | throw SQLError.createSQLException( |
253 | "Syntax error for TIMESTAMP escape sequence '" |
254 | + token + "'", "42000"); |
255 | } |
256 | |
257 | String argument = token.substring(startPos, endPos); |
258 | |
259 | try { |
260 | StringTokenizer st = new StringTokenizer(argument, |
261 | " .-:"); |
262 | String year4 = st.nextToken(); |
263 | String month2 = st.nextToken(); |
264 | String day2 = st.nextToken(); |
265 | String hour = st.nextToken(); |
266 | String minute = st.nextToken(); |
267 | String second = st.nextToken(); |
268 | |
269 | /* |
270 | * For now, we get the fractional seconds part, but |
271 | * we don't use it, as MySQL doesn't support it in |
272 | * it's TIMESTAMP data type |
273 | * |
274 | * String fractionalSecond = ""; |
275 | * |
276 | * if (st.hasMoreTokens()) { fractionalSecond = |
277 | * st.nextToken(); } |
278 | */ |
279 | /* |
280 | * Use the full format because number format will |
281 | * not work for "between" clauses. |
282 | * |
283 | * Ref. Mysql Docs |
284 | * |
285 | * You can specify DATETIME, DATE and TIMESTAMP |
286 | * values using any of a common set of formats: |
287 | * |
288 | * As a string in either 'YYYY-MM-DD HH:MM:SS' or |
289 | * 'YY-MM-DD HH:MM:SS' format. |
290 | * |
291 | * Thanks to Craig Longman for pointing out this bug |
292 | */ |
293 | if (!conn.getUseTimezone() && !conn.getUseJDBCCompliantTimezoneShift()) { |
294 | newSql.append("'").append(year4).append("-") |
295 | .append(month2).append("-").append(day2) |
296 | .append(" ").append(hour).append(":") |
297 | .append(minute).append(":").append(second) |
298 | .append("'"); |
299 | } else { |
300 | Calendar sessionCalendar; |
301 | |
302 | if (conn != null) { |
303 | sessionCalendar = conn.getCalendarInstanceForSessionOrNew(); |
304 | } else { |
305 | sessionCalendar = new GregorianCalendar(); |
306 | sessionCalendar.setTimeZone(TimeZone.getTimeZone("GMT")); |
307 | } |
308 | |
309 | try { |
310 | int year4Int = Integer.parseInt(year4); |
311 | int month2Int = Integer.parseInt(month2); |
312 | int day2Int = Integer.parseInt(day2); |
313 | int hourInt = Integer.parseInt(hour); |
314 | int minuteInt = Integer.parseInt(minute); |
315 | int secondInt = Integer.parseInt(second); |
316 | |
317 | synchronized (sessionCalendar) { |
318 | boolean useGmtMillis = conn.getUseGmtMillisForDatetimes(); |
319 | |
320 | Timestamp toBeAdjusted = TimeUtil.fastTimestampCreate(useGmtMillis, |
321 | useGmtMillis ? Calendar.getInstance(TimeZone.getTimeZone("GMT")): null, |
322 | sessionCalendar, |
323 | year4Int, |
324 | month2Int, |
325 | day2Int, |
326 | hourInt, |
327 | minuteInt, |
328 | secondInt, |
329 | 0); |
330 | |
331 | Timestamp inServerTimezone = TimeUtil.changeTimezone( |
332 | conn, |
333 | sessionCalendar, |
334 | null, |
335 | toBeAdjusted, |
336 | sessionCalendar.getTimeZone(), |
337 | conn.getServerTimezoneTZ(), |
338 | false); |
339 | |
340 | |
341 | newSql.append("'"); |
342 | |
343 | String timezoneLiteral = inServerTimezone.toString(); |
344 | |
345 | int indexOfDot = timezoneLiteral.indexOf("."); |
346 | |
347 | if (indexOfDot != -1) { |
348 | timezoneLiteral = timezoneLiteral.substring(0, indexOfDot); |
349 | } |
350 | |
351 | newSql.append(timezoneLiteral); |
352 | } |
353 | |
354 | newSql.append("'"); |
355 | |
356 | |
357 | } catch (NumberFormatException nfe) { |
358 | throw SQLError.createSQLException("Syntax error in TIMESTAMP escape sequence '" |
359 | + token + "'.", |
360 | SQLError.SQL_STATE_ILLEGAL_ARGUMENT); |
361 | } |
362 | } |
363 | } catch (java.util.NoSuchElementException e) { |
364 | throw SQLError.createSQLException( |
365 | "Syntax error for TIMESTAMP escape sequence '" |
366 | + argument + "'", "42000"); |
367 | } |
368 | } else if (StringUtils.startsWithIgnoreCase(collapsedToken, |
369 | "{t")) { |
370 | int startPos = token.indexOf('\'') + 1; |
371 | int endPos = token.lastIndexOf('\''); // no } |
372 | |
373 | if ((startPos == -1) || (endPos == -1)) { |
374 | throw SQLError.createSQLException( |
375 | "Syntax error for TIME escape sequence '" |
376 | + token + "'", "42000"); |
377 | } |
378 | |
379 | String argument = token.substring(startPos, endPos); |
380 | |
381 | try { |
382 | StringTokenizer st = new StringTokenizer(argument, |
383 | " :"); |
384 | String hour = st.nextToken(); |
385 | String minute = st.nextToken(); |
386 | String second = st.nextToken(); |
387 | |
388 | if (!conn.getUseTimezone()) { |
389 | String timeString = "'" + hour + ":" + minute + ":" |
390 | + second + "'"; |
391 | newSql.append(timeString); |
392 | } else { |
393 | Calendar sessionCalendar = null; |
394 | |
395 | if (conn != null) { |
396 | sessionCalendar = conn.getCalendarInstanceForSessionOrNew(); |
397 | } else { |
398 | sessionCalendar = new GregorianCalendar(); |
399 | } |
400 | |
401 | try { |
402 | int hourInt = Integer.parseInt(hour); |
403 | int minuteInt = Integer.parseInt(minute); |
404 | int secondInt = Integer.parseInt(second); |
405 | |
406 | synchronized (sessionCalendar) { |
407 | Time toBeAdjusted = TimeUtil.fastTimeCreate( |
408 | sessionCalendar, |
409 | hourInt, |
410 | minuteInt, |
411 | secondInt); |
412 | |
413 | Time inServerTimezone = TimeUtil.changeTimezone( |
414 | conn, |
415 | sessionCalendar, |
416 | null, |
417 | toBeAdjusted, |
418 | sessionCalendar.getTimeZone(), |
419 | conn.getServerTimezoneTZ(), |
420 | false); |
421 | |
422 | newSql.append("'"); |
423 | newSql.append(inServerTimezone.toString()); |
424 | newSql.append("'"); |
425 | } |
426 | |
427 | } catch (NumberFormatException nfe) { |
428 | throw SQLError.createSQLException("Syntax error in TIMESTAMP escape sequence '" |
429 | + token + "'.", |
430 | SQLError.SQL_STATE_ILLEGAL_ARGUMENT); |
431 | } |
432 | } |
433 | } catch (java.util.NoSuchElementException e) { |
434 | throw SQLError.createSQLException( |
435 | "Syntax error for escape sequence '" |
436 | + argument + "'", "42000"); |
437 | } |
438 | } else if (StringUtils.startsWithIgnoreCase(collapsedToken, |
439 | "{call") |
440 | || StringUtils.startsWithIgnoreCase(collapsedToken, |
441 | "{?=call")) { |
442 | |
443 | int startPos = StringUtils.indexOfIgnoreCase(token, |
444 | "CALL") + 5; |
445 | int endPos = token.length() - 1; |
446 | |
447 | if (StringUtils.startsWithIgnoreCase(collapsedToken, |
448 | "{?=call")) { |
449 | callingStoredFunction = true; |
450 | newSql.append("SELECT "); |
451 | newSql.append(token.substring(startPos, endPos)); |
452 | } else { |
453 | callingStoredFunction = false; |
454 | newSql.append("CALL "); |
455 | newSql.append(token.substring(startPos, endPos)); |
456 | } |
457 | } else if (StringUtils.startsWithIgnoreCase(collapsedToken, |
458 | "{oj")) { |
459 | // MySQL already handles this escape sequence |
460 | // because of ODBC. Cool. |
461 | newSql.append(token); |
462 | } |
463 | } else { |
464 | newSql.append(token); // it's just part of the query |
465 | } |
466 | } |
467 | } |
468 | |
469 | String escapedSql = newSql.toString(); |
470 | |
471 | // |
472 | // FIXME: Let MySQL do this, however requires |
473 | // lightweight parsing of statement |
474 | // |
475 | if (replaceEscapeSequence) { |
476 | String currentSql = escapedSql; |
477 | |
478 | while (currentSql.indexOf(escapeSequence) != -1) { |
479 | int escapePos = currentSql.indexOf(escapeSequence); |
480 | String lhs = currentSql.substring(0, escapePos); |
481 | String rhs = currentSql.substring(escapePos + 1, currentSql |
482 | .length()); |
483 | currentSql = lhs + "\\" + rhs; |
484 | } |
485 | |
486 | escapedSql = currentSql; |
487 | } |
488 | |
489 | EscapeProcessorResult epr = new EscapeProcessorResult(); |
490 | epr.escapedSql = escapedSql; |
491 | epr.callingStoredFunction = callingStoredFunction; |
492 | |
493 | if (usesVariables != Statement.USES_VARIABLES_TRUE) { |
494 | if (escapeTokenizer.sawVariableUse()) { |
495 | epr.usesVariables = Statement.USES_VARIABLES_TRUE; |
496 | } else { |
497 | epr.usesVariables = Statement.USES_VARIABLES_FALSE; |
498 | } |
499 | } |
500 | |
501 | return epr; |
502 | } |
503 | |
504 | /** |
505 | * Re-writes {fn convert (expr, type)} as cast(expr AS type) |
506 | * |
507 | * @param functionToken |
508 | * @return |
509 | * @throws SQLException |
510 | */ |
511 | private static String processConvertToken(String functionToken, |
512 | boolean serverSupportsConvertFn) throws SQLException { |
513 | // The JDBC spec requires these types: |
514 | // |
515 | // BIGINT |
516 | // BINARY |
517 | // BIT |
518 | // CHAR |
519 | // DATE |
520 | // DECIMAL |
521 | // DOUBLE |
522 | // FLOAT |
523 | // INTEGER |
524 | // LONGVARBINARY |
525 | // LONGVARCHAR |
526 | // REAL |
527 | // SMALLINT |
528 | // TIME |
529 | // TIMESTAMP |
530 | // TINYINT |
531 | // VARBINARY |
532 | // VARCHAR |
533 | |
534 | // MySQL supports these types: |
535 | // |
536 | // BINARY |
537 | // CHAR |
538 | // DATE |
539 | // DATETIME |
540 | // SIGNED (integer) |
541 | // UNSIGNED (integer) |
542 | // TIME |
543 | |
544 | int firstIndexOfParen = functionToken.indexOf("("); |
545 | |
546 | if (firstIndexOfParen == -1) { |
547 | throw SQLError.createSQLException( |
548 | "Syntax error while processing {fn convert (... , ...)} token, missing opening parenthesis in token '" |
549 | + functionToken + "'.", |
550 | SQLError.SQL_STATE_SYNTAX_ERROR); |
551 | } |
552 | |
553 | int tokenLength = functionToken.length(); |
554 | |
555 | int indexOfComma = functionToken.lastIndexOf(","); |
556 | |
557 | if (indexOfComma == -1) { |
558 | throw SQLError.createSQLException( |
559 | "Syntax error while processing {fn convert (... , ...)} token, missing comma in token '" |
560 | + functionToken + "'.", |
561 | SQLError.SQL_STATE_SYNTAX_ERROR); |
562 | } |
563 | |
564 | int indexOfCloseParen = functionToken.indexOf(')', indexOfComma); |
565 | |
566 | if (indexOfCloseParen == -1) { |
567 | throw SQLError.createSQLException( |
568 | "Syntax error while processing {fn convert (... , ...)} token, missing closing parenthesis in token '" |
569 | + functionToken + "'.", |
570 | SQLError.SQL_STATE_SYNTAX_ERROR); |
571 | |
572 | } |
573 | |
574 | String expression = functionToken.substring(firstIndexOfParen + 1, |
575 | indexOfComma); |
576 | String type = functionToken.substring(indexOfComma + 1, |
577 | indexOfCloseParen); |
578 | |
579 | String newType = null; |
580 | |
581 | String trimmedType = type.trim(); |
582 | |
583 | if (StringUtils.startsWithIgnoreCase(trimmedType, "SQL_")) { |
584 | trimmedType = trimmedType.substring(4, trimmedType.length()); |
585 | } |
586 | |
587 | if (serverSupportsConvertFn) { |
588 | newType = (String) JDBC_CONVERT_TO_MYSQL_TYPE_MAP.get(trimmedType |
589 | .toUpperCase(Locale.ENGLISH)); |
590 | } else { |
591 | newType = (String) JDBC_NO_CONVERT_TO_MYSQL_EXPRESSION_MAP |
592 | .get(trimmedType.toUpperCase(Locale.ENGLISH)); |
593 | |
594 | // We need a 'special' check here to give a better error message. If |
595 | // we're in this |
596 | // block, the version of MySQL we're connected to doesn't support |
597 | // CAST/CONVERT, |
598 | // so we can't re-write some data type conversions |
599 | // (date,time,timestamp, datetime) |
600 | |
601 | if (newType == null) { |
602 | throw SQLError.createSQLException( |
603 | "Can't find conversion re-write for type '" |
604 | + type |
605 | + "' that is applicable for this server version while processing escape tokens.", |
606 | SQLError.SQL_STATE_GENERAL_ERROR); |
607 | } |
608 | } |
609 | |
610 | if (newType == null) { |
611 | throw SQLError.createSQLException("Unsupported conversion type '" |
612 | + type.trim() + "' found while processing escape token.", |
613 | SQLError.SQL_STATE_GENERAL_ERROR); |
614 | } |
615 | |
616 | int replaceIndex = newType.indexOf("?"); |
617 | |
618 | if (replaceIndex != -1) { |
619 | StringBuffer convertRewrite = new StringBuffer(newType.substring(0, |
620 | replaceIndex)); |
621 | convertRewrite.append(expression); |
622 | convertRewrite.append(newType.substring(replaceIndex + 1, newType |
623 | .length())); |
624 | |
625 | return convertRewrite.toString(); |
626 | } else { |
627 | |
628 | StringBuffer castRewrite = new StringBuffer("CAST("); |
629 | castRewrite.append(expression); |
630 | castRewrite.append(" AS "); |
631 | castRewrite.append(newType); |
632 | castRewrite.append(")"); |
633 | |
634 | return castRewrite.toString(); |
635 | } |
636 | } |
637 | |
638 | /** |
639 | * Removes all whitespace from the given String. We use this to make escape |
640 | * token comparison white-space ignorant. |
641 | * |
642 | * @param toCollapse |
643 | * the string to remove the whitespace from |
644 | * |
645 | * @return a string with _no_ whitespace. |
646 | */ |
647 | private static String removeWhitespace(String toCollapse) { |
648 | if (toCollapse == null) { |
649 | return null; |
650 | } |
651 | |
652 | int length = toCollapse.length(); |
653 | |
654 | StringBuffer collapsed = new StringBuffer(length); |
655 | |
656 | for (int i = 0; i < length; i++) { |
657 | char c = toCollapse.charAt(i); |
658 | |
659 | if (!Character.isWhitespace(c)) { |
660 | collapsed.append(c); |
661 | } |
662 | } |
663 | |
664 | return collapsed.toString(); |
665 | } |
666 | } |