001
014
015 package com.liferay.portal.dao.orm.common;
016
017 import com.liferay.portal.kernel.dao.db.DB;
018 import com.liferay.portal.kernel.dao.db.DBFactoryUtil;
019 import com.liferay.portal.kernel.log.Log;
020 import com.liferay.portal.kernel.log.LogFactoryUtil;
021 import com.liferay.portal.kernel.util.CharPool;
022 import com.liferay.portal.kernel.util.StringBundler;
023 import com.liferay.portal.kernel.util.StringPool;
024 import com.liferay.portal.kernel.util.StringUtil;
025
026 import java.util.Map;
027 import java.util.concurrent.ConcurrentHashMap;
028 import java.util.regex.Matcher;
029 import java.util.regex.Pattern;
030
031
035 public class SQLTransformer {
036
037 public static void reloadSQLTransformer() {
038 _instance._reloadSQLTransformer();
039 }
040
041 public static String transform(String sql) {
042 return _instance._transform(sql);
043 }
044
045 public static String transformFromHqlToJpql(String sql) {
046 return _instance._transformFromHqlToJpql(sql);
047 }
048
049 public static String transformFromJpqlToHql(String sql) {
050 return _instance._transformFromJpqlToHql(sql);
051 }
052
053 private SQLTransformer() {
054 _reloadSQLTransformer();
055 }
056
057 private void _reloadSQLTransformer() {
058 if (_transformedSqls == null) {
059 _transformedSqls = new ConcurrentHashMap<String, String>();
060 }
061 else {
062 _transformedSqls.clear();
063 }
064
065 _vendorDB2 = false;
066 _vendorDerby = false;
067 _vendorFirebird = false;
068
069 _vendorInformix = false;
070 _vendorIngres = false;
071 _vendorInterbase = false;
072 _vendorMySQL = false;
073 _vendorOracle = false;
074 _vendorPostgreSQL = false;
075 _vendorSQLServer = false;
076 _vendorSybase = false;
077
078 DB db = DBFactoryUtil.getDB();
079
080 String dbType = db.getType();
081
082 _db = db;
083
084 if (dbType.equals(DB.TYPE_DB2)) {
085 _vendorDB2 = true;
086 }
087 else if (dbType.equals(DB.TYPE_DERBY)) {
088 _vendorDerby = true;
089 }
090 else if (dbType.equals(DB.TYPE_FIREBIRD)) {
091 _vendorFirebird = true;
092 }
093 else if (dbType.equals(DB.TYPE_HYPERSONIC)) {
094
095 }
096 else if (dbType.equals(DB.TYPE_INFORMIX)) {
097 _vendorInformix = true;
098 }
099 else if (dbType.equals(DB.TYPE_INGRES)) {
100 _vendorIngres = true;
101 }
102 else if (dbType.equals(DB.TYPE_INTERBASE)) {
103 _vendorInterbase = true;
104 }
105 else if (dbType.equals(DB.TYPE_MYSQL)) {
106 _vendorMySQL = true;
107 }
108 else if (db.getType().equals(DB.TYPE_ORACLE)) {
109 _vendorOracle = true;
110 }
111 else if (dbType.equals(DB.TYPE_POSTGRESQL)) {
112 _vendorPostgreSQL = true;
113 }
114 else if (dbType.equals(DB.TYPE_SQLSERVER)) {
115 _vendorSQLServer = true;
116 }
117 else if (dbType.equals(DB.TYPE_SYBASE)) {
118 _vendorSybase = true;
119 }
120 }
121
122 private String _removeLower(String sql) {
123 int x = sql.indexOf(_LOWER_OPEN);
124
125 if (x == -1) {
126 return sql;
127 }
128
129 StringBuilder sb = new StringBuilder(sql.length());
130
131 int y = 0;
132
133 while (true) {
134 sb.append(sql.substring(y, x));
135
136 y = sql.indexOf(_LOWER_CLOSE, x);
137
138 if (y == -1) {
139 sb.append(sql.substring(x));
140
141 break;
142 }
143
144 sb.append(sql.substring(x + _LOWER_OPEN.length(), y));
145
146 y++;
147
148 x = sql.indexOf(_LOWER_OPEN, y);
149
150 if (x == -1) {
151 sb.append(sql.substring(y));
152
153 break;
154 }
155 }
156
157 sql = sb.toString();
158
159 return sql;
160 }
161
162 private String _replaceBitwiseCheck(String sql) {
163 Matcher matcher = _bitwiseCheckPattern.matcher(sql);
164
165 if (_vendorDerby) {
166 return matcher.replaceAll("MOD($1 / $2, 2) != 0");
167 }
168 else if (_vendorInformix || _vendorIngres) {
169 return matcher.replaceAll("BIT_AND($1, $2)");
170 }
171 else if (_vendorFirebird || _vendorInterbase) {
172 return matcher.replaceAll("BIN_AND($1, $2)");
173 }
174 else if (_vendorMySQL || _vendorPostgreSQL || _vendorSQLServer ||
175 _vendorSybase) {
176
177 return matcher.replaceAll("($1 & $2)");
178 }
179 else {
180 return sql;
181 }
182 }
183
184 private String _replaceBoolean(String newSQL) {
185 return StringUtil.replace(
186 newSQL,
187 new String[] {"[$FALSE$]", "[$TRUE$]"},
188 new String[] {_db.getTemplateFalse(), _db.getTemplateTrue()});
189 }
190
191 private String _replaceCastLong(String sql) {
192 Matcher matcher = _castLongPattern.matcher(sql);
193
194 if (_vendorSybase) {
195 return matcher.replaceAll("CONVERT(BIGINT, $1)");
196 }
197 else {
198 return matcher.replaceAll("$1");
199 }
200 }
201
202 private String _replaceCastText(String sql) {
203 Matcher matcher = _castTextPattern.matcher(sql);
204
205 if (_vendorDB2 || _vendorDerby) {
206 return matcher.replaceAll("CAST($1 AS CHAR(254))");
207 }
208 else if (_vendorOracle) {
209 return matcher.replaceAll("CAST($1 AS VARCHAR(4000))");
210 }
211 else if (_vendorPostgreSQL) {
212 return matcher.replaceAll("CAST($1 AS TEXT)");
213 }
214 else if (_vendorSQLServer) {
215 return matcher.replaceAll("CAST($1 AS NVARCHAR(MAX))");
216 }
217 else if (_vendorSybase) {
218 return matcher.replaceAll("CAST($1 AS NVARCHAR(16384))");
219 }
220 else {
221 return matcher.replaceAll("$1");
222 }
223 }
224
225 private String _replaceIntegerDivision(String sql) {
226 Matcher matcher = _integerDivisionPattern.matcher(sql);
227
228 if (_vendorMySQL) {
229 return matcher.replaceAll("$1 DIV $2");
230 }
231 else if (_vendorOracle) {
232 return matcher.replaceAll("TRUNC($1 / $2)");
233 }
234 else {
235 return matcher.replaceAll("$1 / $2");
236 }
237 }
238
239 private String _replaceMod(String sql) {
240 Matcher matcher = _modPattern.matcher(sql);
241
242 return matcher.replaceAll("$1 % $2");
243 }
244
245 private String _replaceNegativeComparison(String sql) {
246 Matcher matcher = _negativeComparisonPattern.matcher(sql);
247
248 return matcher.replaceAll("$1 ($2)");
249 }
250
251 private String _replaceReplace(String newSQL) {
252 return StringUtil.replace(newSQL, "replace(", "str_replace(");
253 }
254
255 private String _replaceUnion(String sql) {
256 Matcher matcher = _unionAllPattern.matcher(sql);
257
258 return matcher.replaceAll("$1 $2");
259 }
260
261 private String _transform(String sql) {
262 if (sql == null) {
263 return sql;
264 }
265
266 String newSQL = sql;
267
268 newSQL = _replaceBitwiseCheck(newSQL);
269 newSQL = _replaceBoolean(newSQL);
270 newSQL = _replaceCastLong(newSQL);
271 newSQL = _replaceCastText(newSQL);
272 newSQL = _replaceIntegerDivision(newSQL);
273
274 if (_vendorDerby) {
275 newSQL = _replaceUnion(newSQL);
276 }
277 else if (_vendorMySQL) {
278 DB db = DBFactoryUtil.getDB();
279
280 if (!db.isSupportsStringCaseSensitiveQuery()) {
281 newSQL = _removeLower(newSQL);
282 }
283 }
284 else if (_vendorPostgreSQL) {
285 newSQL = _replaceNegativeComparison(newSQL);
286 }
287 else if (_vendorSQLServer) {
288 newSQL = _replaceMod(newSQL);
289 }
290 else if (_vendorSybase) {
291 newSQL = _replaceMod(newSQL);
292 newSQL = _replaceReplace(newSQL);
293 }
294
295 if (_log.isDebugEnabled()) {
296 _log.debug("Original SQL " + sql);
297 _log.debug("Modified SQL " + newSQL);
298 }
299
300 return newSQL;
301 }
302
303 private String _transformFromHqlToJpql(String sql) {
304 String newSQL = _transformedSqls.get(sql);
305
306 if (newSQL != null) {
307 return newSQL;
308 }
309
310 newSQL = _transform(sql);
311
312 newSQL = _transformPositionalParams(newSQL);
313
314 newSQL = StringUtil.replace(newSQL, _HQL_NOT_EQUALS, _JPQL_NOT_EQUALS);
315 newSQL = StringUtil.replace(
316 newSQL, _HQL_COMPOSITE_ID_MARKER, _JPQL_DOT_SEPARTOR);
317
318 _transformedSqls.put(sql, newSQL);
319
320 return newSQL;
321 }
322
323 private String _transformFromJpqlToHql(String sql) {
324 String newSQL = _transformedSqls.get(sql);
325
326 if (newSQL != null) {
327 return newSQL;
328 }
329
330 newSQL = _transform(sql);
331
332 Matcher matcher = _jpqlCountPattern.matcher(newSQL);
333
334 if (matcher.find()) {
335 String countExpression = matcher.group(1);
336 String entityAlias = matcher.group(3);
337
338 if (entityAlias.equals(countExpression)) {
339 newSQL = matcher.replaceFirst(_HQL_COUNT_SQL);
340 }
341 }
342
343 _transformedSqls.put(sql, newSQL);
344
345 return newSQL;
346 }
347
348 private String _transformPositionalParams(String queryString) {
349 if (queryString.indexOf(CharPool.QUESTION) == -1) {
350 return queryString;
351 }
352
353 StringBundler sb = new StringBundler();
354
355 int i = 1;
356 int from = 0;
357 int to = 0;
358
359 while ((to = queryString.indexOf(CharPool.QUESTION, from)) != -1) {
360 sb.append(queryString.substring(from, to));
361 sb.append(StringPool.QUESTION);
362 sb.append(i++);
363
364 from = to + 1;
365 }
366
367 sb.append(queryString.substring(from, queryString.length()));
368
369 return sb.toString();
370 }
371
372 private static final String _HQL_COMPOSITE_ID_MARKER = "\\.id\\.";
373
374 private static final String _HQL_COUNT_SQL = "SELECT COUNT(*) FROM $2 $3";
375
376 private static final String _HQL_NOT_EQUALS = "!=";
377
378 private static final String _JPQL_DOT_SEPARTOR = ".";
379
380 private static final String _JPQL_NOT_EQUALS = "<>";
381
382 private static final String _LOWER_CLOSE = StringPool.CLOSE_PARENTHESIS;
383
384 private static final String _LOWER_OPEN = "lower(";
385
386 private static Log _log = LogFactoryUtil.getLog(SQLTransformer.class);
387
388 private static SQLTransformer _instance = new SQLTransformer();
389
390 private static Pattern _bitwiseCheckPattern = Pattern.compile(
391 "BITAND\\((.+?),(.+?)\\)");
392 private static Pattern _castLongPattern = Pattern.compile(
393 "CAST_LONG\\((.+?)\\)", Pattern.CASE_INSENSITIVE);
394 private static Pattern _castTextPattern = Pattern.compile(
395 "CAST_TEXT\\((.+?)\\)", Pattern.CASE_INSENSITIVE);
396 private static Pattern _integerDivisionPattern = Pattern.compile(
397 "INTEGER_DIV\\((.+?),(.+?)\\)", Pattern.CASE_INSENSITIVE);
398 private static Pattern _jpqlCountPattern = Pattern.compile(
399 "SELECT COUNT\\((\\S+)\\) FROM (\\S+) (\\S+)");
400 private static Pattern _modPattern = Pattern.compile(
401 "MOD\\((.+?),(.+?)\\)", Pattern.CASE_INSENSITIVE);
402 private static Pattern _negativeComparisonPattern = Pattern.compile(
403 "(!=)?( -([0-9]+)?)", Pattern.CASE_INSENSITIVE);
404 private static Pattern _unionAllPattern = Pattern.compile(
405 "SELECT \\* FROM(.*)TEMP_TABLE(.*)", Pattern.CASE_INSENSITIVE);
406
407 private DB _db;
408 private Map<String, String> _transformedSqls;
409 private boolean _vendorDB2;
410 private boolean _vendorDerby;
411 private boolean _vendorFirebird;
412
413 private boolean _vendorInformix;
414 private boolean _vendorIngres;
415 private boolean _vendorInterbase;
416 private boolean _vendorMySQL;
417 private boolean _vendorOracle;
418 private boolean _vendorPostgreSQL;
419 private boolean _vendorSQLServer;
420 private boolean _vendorSybase;
421
422 }