typo3/sysext/extbase/Classes/Persistence/Storage/Typo3DbBackend.php

   1 <?php
   2 /***************************************************************
   3 *  Copyright notice
   4 *
   5 *  (c) 2009 Jochen Rau <jochen.rau@typoplanet.de>
   6 *  All rights reserved
   7 *
   8 *  This class is a backport of the corresponding class of FLOW3.
   9 *  All credits go to the v5 team.
  10 *
  11 *  This script is part of the TYPO3 project. The TYPO3 project is
  12 *  free software; you can redistribute it and/or modify
  13 *  it under the terms of the GNU General Public License as published by
  14 *  the Free Software Foundation; either version 2 of the License, or
  15 *  (at your option) any later version.
  16 *
  17 *  The GNU General Public License can be found at
  18 *  http://www.gnu.org/copyleft/gpl.html.
  19 *
  20 *  This script is distributed in the hope that it will be useful,
  21 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 *  GNU General Public License for more details.
  24 *
  25 *  This copyright notice MUST APPEAR in all copies of the script!
  26 ***************************************************************/
  27
  28 /**
  29  * A Storage backend
  30  *
  31  * @package Extbase
  32  * @subpackage Persistence
  33  * @version $Id: $
  34  */
  35 class Tx_Extbase_Persistence_Storage_Typo3DbBackend implements Tx_Extbase_Persistence_Storage_BackendInterface, t3lib_Singleton {
  36
  37         const OPERATOR_EQUAL_TO_NULL = 'operatorEqualToNull';
  38         const OPERATOR_NOT_EQUAL_TO_NULL = 'operatorNotEqualToNull';
  39
  40         /**
  41          * The TYPO3 database object
  42          *
  43          * @var t3lib_db
  44          */
  45         protected $databaseHandle;
  46
  47         /**
  48          * The TYPO3 page select object. Used for language and workspace overlay
  49          *
  50          * @var t3lib_pageSelect
  51          */
  52         protected $pageSelectObject;
  53
  54         /**
  55          * TRUE if the framework should add the "enable fields" (e.g. checking for hidden or deleted records)
  56          *
  57          * @var boolean
  58          */
  59         protected $useEnableFields = TRUE;
  60
  61         /**
  62          * TRUE if automatic cache clearing in TCEMAIN should be done on insert/update/delete, FALSE otherwise.
  63          *
  64          * @var boolean
  65          */
  66         protected $automaticCacheClearing = FALSE;
  67
  68         /**
  69          * Constructs this Storage Backend instance
  70          *
  71          * @param t3lib_db $databaseHandle The database handle
  72          */
  73         public function __construct($databaseHandle) {
  74                 $this->databaseHandle = $databaseHandle;
  75         }
  76
  77         /**
  78          * Set the automatic cache clearing flag.
  79          * If TRUE, then inserted/updated/deleted records trigger a TCEMAIN cache clearing.
  80          *
  81          * @param $automaticCacheClearing boolean if TRUE, enables automatic cache clearing
  82          * @return void
  83          * @internal
  84          */
  85         public function setAutomaticCacheClearing($automaticCacheClearing) {
  86                 $this->automaticCacheClearing = (boolean)$automaticCacheClearing;
  87         }
  88
  89         /**
  90          * Adds a row to the storage
  91          *
  92          * @param string $tableName The database table name
  93          * @param array $row The row to be inserted
  94          * @param boolean $isRelation TRUE if we are currently inserting into a relation table, FALSE by default
  95          * @return int The uid of the inserted row
  96          */
  97         public function addRow($tableName, array $row, $isRelation = FALSE) {
  98                 $fields = array();
  99                 $values = array();
 100                 $parameters = array();
 101                 unset($row['uid']); // TODO Check if the offset exists
 102                 foreach ($row as $columnName => $value) {
 103                         $fields[] = $columnName;
 104                         $values[] = '?';
 105                         $parameters[] = $value;
 106                 }
 107
 108                 $sqlString = 'INSERT INTO ' . $tableName . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $values) . ')';
 109                 $this->replacePlaceholders($sqlString, $parameters);
 110                 $this->databaseHandle->sql_query($sqlString);
 111                 $this->checkSqlErrors();
 112                 $uid = $this->databaseHandle->sql_insert_id();
 113                 if (!$isRelation) {
 114                         $this->clearPageCache($tableName, $uid);
 115                 }
 116                 return $uid;
 117         }
 118
 119         /**
 120          * Updates a row in the storage
 121          *
 122          * @param string $tableName The database table name
 123          * @param array $row The row to be updated
 124          * @param boolean $isRelation TRUE if we are currently inserting into a relation table, FALSE by default
 125          * @return void
 126          */
 127         public function updateRow($tableName, array $row, $isRelation = FALSE) {
 128                 if (!isset($row['uid'])) throw new InvalidArgumentException('The given row must contain a value for "uid".');
 129                 $uid = (int)$row['uid'];
 130                 unset($row['uid']);
 131                 $fields = array();
 132                 $parameters = array();
 133                 foreach ($row as $columnName => $value) {
 134                         $fields[] = $columnName . '=?';
 135                         $parameters[] = $value;
 136                 }
 137                 $parameters[] = $uid;
 138
 139                 $sqlString = 'UPDATE ' . $tableName . ' SET ' . implode(', ', $fields) . ' WHERE uid=?';
 140                 $this->replacePlaceholders($sqlString, $parameters);
 141
 142                 $returnValue = $this->databaseHandle->sql_query($sqlString);
 143                 $this->checkSqlErrors();
 144                 if (!$isRelation) {
 145                         $this->clearPageCache($tableName, $uid);
 146                 }
 147                 return $returnValue;
 148         }
 149
 150         /**
 151          * Deletes a row in the storage
 152          *
 153          * @param string $tableName The database table name
 154          * @param array $uid The uid of the row to be deleted
 155          * @param boolean $isRelation TRUE if we are currently inserting into a relation table, FALSE by default
 156          * @return void
 157          */
 158         public function removeRow($tableName, $uid, $isRelation = FALSE) {
 159                 $sqlString = 'DELETE FROM ' . $tableName . ' WHERE uid=?';
 160                 $this->replacePlaceholders($sqlString, array((int)$uid));
 161                 if (!$isRelation) {
 162                         $this->clearPageCache($tableName, $uid, $isRelation);
 163                 }
 164                 $returnValue = $this->databaseHandle->sql_query($sqlString);
 165                 $this->checkSqlErrors();
 166                 return $returnValue;
 167         }
 168
 169         /**
 170          * Returns an array with tuples matching the query.
 171          *
 172          * @param Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query
 173          * @return array The matching tuples
 174          */
 175         public function getRows(Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query) {
 176                 $sql = array();
 177                 $sql['tables'] = array();
 178                 $sql['fields'] = array();
 179                 $sql['where'] = array();
 180                 $sql['enableFields'] = array();
 181                 $sql['orderings'] = array();
 182                 $parameters = array();
 183                 $tuples = array();
 184
 185                 $this->parseSource($query, $sql, $parameters);
 186                 $sqlString = 'SELECT ' . implode(',', $sql['fields']) . ' FROM ' . implode(' ', $sql['tables']);
 187
 188                 $this->parseConstraint($query->getConstraint(), $sql, $parameters, $query->getBoundVariableValues());
 189                 if (!empty($sql['where'])) {
 190                         $sqlString .= ' WHERE ' . implode('', $sql['where']);
 191                         if (!empty($sql['enableFields'])) {
 192                                 $sqlString .= ' AND ' . implode(' AND ', $sql['enableFields']);
 193                         }
 194                 } elseif (!empty($sql['enableFields'])) {
 195                         $sqlString .= ' WHERE ' . implode(' AND ', $sql['enableFields']);
 196                 }
 197
 198                 $this->parseOrderings($query->getOrderings(), $sql, $parameters, $query->getBoundVariableValues());
 199                 if (!empty($sql['orderings'])) {
 200                         $sqlString .= ' ORDER BY ' . implode(', ', $sql['orderings']);
 201                 }
 202
 203                 $this->replacePlaceholders($sqlString, $parameters);
 204
 205                 $result = $this->databaseHandle->sql_query($sqlString);
 206                 $this->checkSqlErrors();
 207                 if ($result) {
 208                         // TODO Check for selector name
 209                         $tuples = $this->getRowsFromResult($query->getSelectorName(), $result);
 210                 }
 211
 212                 return $tuples;
 213         }
 214
 215         /**
 216          * Checks if a Value Object equal to the given Object exists in the data base
 217          *
 218          * @param array $properties The properties of the Value Object
 219          * @param Tx_Extbase_Persistence_Mapper_DataMap $dataMap The Data Map
 220          * @return array The matching tuples
 221          */
 222         public function hasValueObject(array $properties, Tx_Extbase_Persistence_Mapper_DataMap $dataMap) {
 223                 $fields = array();
 224                 $parameters = array();
 225                 foreach ($properties as $propertyName => $propertyValue) {
 226                         if ($dataMap->isPersistableProperty($propertyName) && ($propertyName !== 'uid')) {
 227                                 $fields[] = $dataMap->getColumnMap($propertyName)->getColumnName() . '=?';
 228                                 $parameters[] = $dataMap->convertPropertyValueToFieldValue($propertyValue);
 229                         }
 230                 }
 231
 232                 $sqlString = 'SELECT * FROM ' . $dataMap->getTableName() .  ' WHERE ' . implode('', $fields);
 233                 $this->replacePlaceholders($sqlString, $parameters);
 234                 $res = $this->databaseHandle->sql_query($sqlString);
 235                 $this->checkSqlErrors();
 236                 $row = $this->databaseHandle->sql_fetch_assoc($res);
 237                 if ($row !== FALSE) {
 238                         return $row['uid'];
 239                 } else {
 240                         return FALSE;
 241                 }
 242         }
 243
 244         /**
 245          * Transforms a Query Source into SQL and parameter arrays
 246          *
 247          * @param Tx_Extbase_Persistence_QOM_QueryObjectModel $query
 248          * @param array &$sql
 249          * @param array &$parameters
 250          * @return void
 251          */
 252         protected function parseSource(Tx_Extbase_Persistence_QOM_QueryObjectModel $query, array &$sql, array &$parameters) {
 253                 $source = $query->getSource();
 254                 if ($source instanceof Tx_Extbase_Persistence_QOM_SelectorInterface) {
 255                         $selectorName = $source->getSelectorName();
 256                         $sql['fields'][] = $selectorName . '.*';
 257                         $sql['tables'][] = $selectorName;
 258                         // TODO Should we make the usage of enableFields configurable? And how? Because the Query object and even the QOM should be abstracted from the storage backend.
 259                         if ($this->useEnableFields === TRUE) {
 260                                 $this->addEnableFieldsStatement($selectorName, $sql);
 261                         }
 262                 } elseif ($source instanceof Tx_Extbase_Persistence_QOM_JoinInterface) {
 263                         $this->parseJoin($source, $sql, $parameters);
 264                 }
 265         }
 266
 267         /**
 268          * Transforms a Join into SQL and parameter arrays
 269          *
 270          * @param Tx_Extbase_Persistence_QOM_JoinInterface $join
 271          * @param array &$sql
 272          * @param array &$parameters
 273          * @return void
 274          */
 275         protected function parseJoin(Tx_Extbase_Persistence_QOM_JoinInterface $join, array &$sql, array &$parameters) {
 276                 $leftSelectorName = $join->getLeft()->getSelectorName();
 277                 $rightSelectorName = $join->getRight()->getSelectorName();
 278
 279                 $sql['fields'][] = $leftSelectorName . '.*';
 280                 $sql['fields'][] = $rightSelectorName . '.*';
 281
 282                 // TODO Implement support for different join types and nested joins
 283                 $sql['tables'][] = $leftSelectorName . ' LEFT JOIN ' . $rightSelectorName;
 284
 285                 $joinCondition = $join->getJoinCondition();
 286                 // TODO Check the parsing of the join
 287                 if ($joinCondition instanceof Tx_Extbase_Persistence_QOM_EquiJoinCondition) {
 288                         $sql['tables'][] = 'ON ' . $joinCondition->getSelector1Name() . '.' . $joinCondition->getProperty1Name() . ' = ' . $joinCondition->getSelector2Name() . '.' . $joinCondition->getProperty2Name();
 289                 }
 290                 // TODO Implement childtableWhere
 291
 292                 $this->addEnableFieldsStatement($leftSelectorName, $sql);
 293                 $this->addEnableFieldsStatement($rightSelectorName, $sql);
 294         }
 295
 296         /**
 297          * Transforms a constraint into SQL and parameter arrays
 298          *
 299          * @param Tx_Extbase_Persistence_QOM_ConstraintInterface $constraint
 300          * @param array &$sql
 301          * @param array &$parameters
 302          * @param array $boundVariableValues
 303          * @return void
 304          */
 305         protected function parseConstraint(Tx_Extbase_Persistence_QOM_ConstraintInterface $constraint = NULL, array &$sql, array &$parameters, array $boundVariableValues) {
 306                 if ($constraint instanceof Tx_Extbase_Persistence_QOM_AndInterface) {
 307                         $sql['where'][] = '(';
 308                         $this->parseConstraint($constraint->getConstraint1(), $sql, $parameters, $boundVariableValues);
 309                         $sql['where'][] = ' AND ';
 310                         $this->parseConstraint($constraint->getConstraint2(), $sql, $parameters, $boundVariableValues);
 311                         $sql['where'][] = ')';
 312                 } elseif ($constraint instanceof Tx_Extbase_Persistence_QOM_OrInterface) {
 313                         $sql['where'][] = '(';
 314                         $this->parseConstraint($constraint->getConstraint1(), $sql, $parameters, $boundVariableValues);
 315                         $sql['where'][] = ' OR ';
 316                         $this->parseConstraint($constraint->getConstraint2(), $sql, $parameters, $boundVariableValues);
 317                         $sql['where'][] = ')';
 318                 } elseif ($constraint instanceof Tx_Extbase_Persistence_QOM_NotInterface) {
 319                         $sql['where'][] = 'NOT (';
 320                         $this->parseConstraint($constraint->getConstraint(), $sql, $parameters, $boundVariableValues);
 321                         $sql['where'][] = ')';
 322                 } elseif ($constraint instanceof Tx_Extbase_Persistence_QOM_ComparisonInterface) {
 323                         $this->parseComparison($constraint, $sql, $parameters, $boundVariableValues);
 324                 } elseif ($constraint instanceof Tx_Extbase_Persistence_QOM_RelatedInterface) {
 325                         $this->parseRelated($constraint, $sql, $parameters, $boundVariableValues);
 326                 }
 327         }
 328
 329         /**
 330          * Parse a Comparison into SQL and parameter arrays.
 331          *
 332          * @param Tx_Extbase_Persistence_QOM_ComparisonInterface $comparison The comparison to parse
 333          * @param array &$sql SQL query parts to add to
 334          * @param array &$parameters Parameters to bind to the SQL
 335          * @param array $boundVariableValues The bound variables in the query and their values
 336          * @return void
 337          */
 338         protected function parseComparison(Tx_Extbase_Persistence_QOM_ComparisonInterface $comparison, array &$sql, array &$parameters, array $boundVariableValues) {
 339                 if (!($comparison->getOperand2() instanceof Tx_Extbase_Persistence_QOM_BindVariableValueInterface)) throw new Tx_Extbase_Persistence_Exception('Type of operand is not supported', 1247581135);
 340
 341                 $value = $boundVariableValues[$comparison->getOperand2()->getBindVariableName()];
 342                 $operator = $comparison->getOperator();
 343                 if ($value === NULL) {
 344                         if ($operator === Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_EQUAL_TO) {
 345                                 $operator = self::OPERATOR_EQUAL_TO_NULL;
 346                         } elseif ($operator === Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_NOT_EQUAL_TO) {
 347                                 $operator = self::OPERATOR_NOT_EQUAL_TO_NULL;
 348                         } else {
 349                                 // TODO Throw exception
 350                         }
 351                 }
 352                 $parameters[] = $value;
 353
 354                 $this->parseDynamicOperand($comparison->getOperand1(), $operator, $sql, $parameters);
 355         }
 356
 357         /**
 358          * Parse a DynamicOperand into SQL and parameter arrays.
 359          *
 360          * @param Tx_Extbase_Persistence_QOM_DynamicOperandInterface $operand
 361          * @param string $operator One of the JCR_OPERATOR_* constants
 362          * @param array $boundVariableValues
 363          * @param array &$parameters
 364          * @param string $valueFunction an aoptional SQL function to apply to the operand value
 365          * @return void
 366          */
 367         protected function parseDynamicOperand(Tx_Extbase_Persistence_QOM_DynamicOperandInterface $operand, $operator, array &$sql, array &$parameters, $valueFunction = NULL) {
 368                 if ($operand instanceof Tx_Extbase_Persistence_QOM_LowerCaseInterface) {
 369                         $this->parseDynamicOperand($operand->getOperand(), $operator, $sql, $parameters, 'LOWER');
 370                 } elseif ($operand instanceof Tx_Extbase_Persistence_QOM_UpperCaseInterface) {
 371                         $this->parseDynamicOperand($operand->getOperand(), $operator, $sql, $parameters, 'UPPER');
 372                 } elseif ($operand instanceof Tx_Extbase_Persistence_QOM_PropertyValueInterface) {
 373                         $selectorName = $operand->getSelectorName();
 374                         $operator = $this->resolveOperator($operator);
 375
 376                         if ($valueFunction === NULL) {
 377                                 $constraintSQL .= (!empty($selectorName) ? $selectorName . '.' : '') . $operand->getPropertyName() .  ' ' . $operator . ' ?';
 378                         } else {
 379                                 $constraintSQL .= $valueFunction . '(' . (!empty($selectorName) ? $selectorName . '.' : '') . $operand->getPropertyName() .  ' ' . $operator . ' ?';
 380                         }
 381
 382                         $sql['where'][] = $constraintSQL;
 383                 }
 384         }
 385
 386         /**
 387          * Returns the SQL operator for the given JCR operator type.
 388          *
 389          * @param string $operator One of the JCR_OPERATOR_* constants
 390          * @return string an SQL operator
 391          */
 392         protected function resolveOperator($operator) {
 393                 switch ($operator) {
 394                         case self::OPERATOR_EQUAL_TO_NULL:
 395                                 $operator = 'IS';
 396                                 break;
 397                         case self::OPERATOR_NOT_EQUAL_TO_NULL:
 398                                 $operator = 'IS NOT';
 399                                 break;
 400                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_EQUAL_TO:
 401                                 $operator = '=';
 402                                 break;
 403                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_NOT_EQUAL_TO:
 404                                 $operator = '!=';
 405                                 break;
 406                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_LESS_THAN:
 407                                 $operator = '<';
 408                                 break;
 409                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_LESS_THAN_OR_EQUAL_TO:
 410                                 $operator = '<=';
 411                                 break;
 412                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_GREATER_THAN:
 413                                 $operator = '>';
 414                                 break;
 415                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_GREATER_THAN_OR_EQUAL_TO:
 416                                 $operator = '>=';
 417                                 break;
 418                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_LIKE:
 419                                 $operator = 'LIKE';
 420                                 break;
 421                         default:
 422                                 throw new Tx_Extbase_Persistence_Exception('Unsupported operator encountered.', 1242816073);
 423                 }
 424
 425                 return $operator;
 426         }
 427
 428         /**
 429          * Replace query placeholders in a query part by the given
 430          * parameters.
 431          *
 432          * @param string $queryPart The query part with placeholders
 433          * @param array $parameters The parameters
 434          * @return string The query part with replaced placeholders
 435          */
 436         protected function replacePlaceholders(&$sqlString, array $parameters) {
 437                 if (substr_count($sqlString, '?') !== count($parameters)) throw new Tx_Extbase_Persistence_Exception('The number of question marks to replace must be equal to the number of parameters.', 1242816074);
 438                 foreach ($parameters as $parameter) {
 439                         $markPosition = strpos($sqlString, '?');
 440                         if ($markPosition !== FALSE) {
 441                                 // TODO This is a bit hacky; improve the handling of $parameter === NULL
 442                                 if ($parameter === NULL) {
 443                                         $parameter = 'NULL';
 444                                 } else {
 445                                         $parameter = '"' . $parameter . '"';
 446                                 }
 447                                 $sqlString = substr($sqlString, 0, $markPosition) . $parameter . substr($sqlString, $markPosition + 1);
 448                         }
 449                 }
 450         }
 451
 452         /**
 453          * Builds the enable fields statement
 454          *
 455          * @param string $selectorName The selector name (= database table name)
 456          * @param array &$sql The query parts
 457          * @return void
 458          */
 459         protected function addEnableFieldsStatement($selectorName, array &$sql) {
 460                 // TODO We have to call the appropriate API method if we are in TYPO3BE mode
 461                 if (is_array($GLOBALS['TCA'][$selectorName]['ctrl'])) {
 462                         $statement = substr($GLOBALS['TSFE']->sys_page->enableFields($selectorName), 4);
 463                         if(!empty($statement)) {
 464                                 $sql['enableFields'][] = $statement;
 465                         }
 466                 }
 467         }
 468
 469         /**
 470          * Transforms orderings into SQL
 471          *
 472          * @param array $orderings
 473          * @param array &$sql
 474          * @param array &$parameters
 475          * @param array $boundVariableValues
 476          * @return void
 477          */
 478         protected function parseOrderings(array $orderings, array &$sql, array &$parameters, array $boundVariableValues) {
 479                 foreach ($orderings as $ordering) {
 480                         $operand = $ordering->getOperand();
 481                         $order = $ordering->getOrder();
 482                         if ($operand instanceof Tx_Extbase_Persistence_QOM_PropertyValue) {
 483                                 switch ($order) {
 484                                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_ORDER_ASCENDING:
 485                                                 $order = 'ASC';
 486                                                 break;
 487                                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_ORDER_DESCENDING:
 488                                                 $order = 'DESC';
 489                                                 break;
 490                                         default:
 491                                                 throw new Tx_Extbase_Persistence_Exception('Unsupported order encountered.', 1242816074);
 492                                 }
 493
 494                                 $sql['orderings'][] = $ordering->getOperand()->getPropertyName() . ' ' . $order;
 495                         }
 496                 }
 497         }
 498
 499         /**
 500          * Transforms a Resource from a database query to an array of rows. Performs the language and
 501          * workspace overlay before.
 502          *
 503          * @return array The result as an array of rows (tuples)
 504          */
 505         protected function getRowsFromResult($tableName, $res) {
 506                 $rows = array();
 507                 while ($row = $this->databaseHandle->sql_fetch_assoc($res)) {
 508                         $row = $this->doLanguageAndWorkspaceOverlay($tableName, $row);
 509                         if (is_array($row)) {
 510                                 // TODO Check if this is necessary, maybe the last line is enough
 511                                 $arrayKeys = range(0,count($row));
 512                                 array_fill_keys($arrayKeys, $row);
 513                                 $rows[] = $row;
 514                         }
 515                 }
 516                 return $rows;
 517         }
 518
 519         /**
 520          * Performs workspace and language overlay on the given row array. The language and workspace id is automatically
 521          * detected (depending on FE or BE context). You can also explicitly set the language/workspace id.
 522          *
 523          * @param Tx_Extbase_Persistence_Mapper_DataMap $dataMap
 524          * @param array $row The row array (as reference)
 525          * @param string $languageUid The language id
 526          * @param string $workspaceUidUid The workspace id
 527          * @return void
 528          */
 529         protected function doLanguageAndWorkspaceOverlay($tableName, array $row, $languageUid = NULL, $workspaceUid = NULL) {
 530                 if (!($this->pageSelectObject instanceof t3lib_pageSelect)) {
 531                         if (TYPO3_MODE == 'FE') {
 532                                 if (is_object($GLOBALS['TSFE'])) {
 533                                         $this->pageSelectObject = $GLOBALS['TSFE']->sys_page;
 534                                         if ($languageUid === NULL) {
 535                                                 $languageUid = $GLOBALS['TSFE']->sys_language_content;
 536                                         }
 537                                 } else {
 538                                         require_once(PATH_t3lib . 'class.t3lib_page.php');
 539                                         $this->pageSelectObject = t3lib_div::makeInstance('t3lib_pageSelect');
 540                                         if ($languageUid === NULL) {
 541                                                 $languageUid = intval(t3lib_div::_GP('L'));
 542                                         }
 543                                 }
 544                                 if ($workspaceUid !== NULL) {
 545                                         $this->pageSelectObject->versioningWorkspaceId = $workspaceUid;
 546                                 }
 547                         } else {
 548                                 require_once(PATH_t3lib . 'class.t3lib_page.php');
 549                                 $this->pageSelectObject = t3lib_div::makeInstance( 't3lib_pageSelect' );
 550                                 //$this->pageSelectObject->versioningPreview =  TRUE;
 551                                 if ($workspaceUid === NULL) {
 552                                         $workspaceUid = $GLOBALS['BE_USER']->workspace;
 553                                 }
 554                                 $this->pageSelectObject->versioningWorkspaceId = $workspaceUid;
 555                         }
 556                 }
 557
 558                 $this->pageSelectObject->versionOL($tableName, $row, TRUE);
 559                 $row = $this->pageSelectObject->getRecordOverlay($tableName, $row, $languageUid, ''); //'hideNonTranslated'
 560                 // TODO Skip if empty languageoverlay (languagevisibility)
 561                 return $row;
 562         }
 563
 564         /**
 565          * Checks if there are SQL errors in the last query, and if yes, throw an exception.
 566          *
 567          * @return void
 568          * @throws Tx_Extbase_Persistence_Storage_Exception_SqlError
 569          */
 570         protected function checkSqlErrors() {
 571                 $error = $this->databaseHandle->sql_error();
 572                 if ($error !== '') {
 573                         throw new Tx_Extbase_Persistence_Storage_Exception_SqlError($error, 1247602160);
 574                 }
 575         }
 576
 577         /**
 578          * Clear the TYPO3 page cache for the given record.
 579          * Much of this functionality is taken from t3lib_tcemain::clear_cache() which unfortunately only works with logged-in BE user.
 580          *
 581          * @param $tableName Table name of the record
 582          * @param $uid UID of the record
 583          * @return void
 584          */
 585         protected function clearPageCache($tableName, $uid) {
 586                 if ($this->automaticCacheClearing !== TRUE) return;
 587
 588                 $pageCache = $GLOBALS['typo3CacheManager']->getCache('cache_pages');
 589                 $pageSectionCache = $GLOBALS['typo3CacheManager']->getCache('cache_pagesection');
 590
 591                 $result = $GLOBALS['TYPO3_DB']->exec_SELECTquery('pid', $tableName, 'uid='.intval($uid));
 592
 593                 $pageIdsToClear = array();
 594                 if ($row = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($result))      {
 595                         $storagePage = $row['pid'];
 596                         $pageIdsToClear[] = $storagePage;
 597                 }
 598                 if (!$storagePage) {
 599                         return;
 600                 }
 601
 602                 $pageTSConfig = t3lib_BEfunc::getPagesTSconfig($storagePage);
 603
 604                 if ($pageTSConfig['clearCacheCmd'])     {
 605                         $clearCacheCommands = t3lib_div::trimExplode(',',strtolower($TSConfig['clearCacheCmd']),1);
 606                                 $clearCacheCommands = array_unique($clearCacheCommands);
 607                                 foreach ($clearCacheCommands as $clearCacheCommand)     {
 608                                         if (t3lib_div::testInt($clearCacheCommand))     {
 609                                                 $pageIdsToClear[] = $clearCacheCommand;
 610                                         }
 611                                 }
 612                         }
 613
 614                 foreach ($pageIdsToClear as $pageIdToClear) {
 615                         $pageCache->flushByTag('pageId_' . $pageIdToClear);
 616                         $pageSectionCache->flushByTag('pageId_' . $pageIdToClear);
 617                 }
 618         }
 619 }
 620
 621 ?>