framework/main/classes/database/backend/lfdb_legacy/class_CachedLocalFileDatabase.php

   1 <?php
   2 // Own namespace
   3 namespace Org\Mxchange\CoreFramework\Database\Backend\Lfdb;
   4
   5 // Import framework stuff
   6 use Org\Mxchange\CoreFramework\Criteria\Criteria;
   7 use Org\Mxchange\CoreFramework\Criteria\Local\LocalSearchCriteria;
   8 use Org\Mxchange\CoreFramework\Criteria\Storing\StoreableCriteria;
   9 use Org\Mxchange\CoreFramework\Database\Backend\BaseDatabaseBackend;
  10 use Org\Mxchange\CoreFramework\Database\Backend\DatabaseBackend;
  11 use Org\Mxchange\CoreFramework\Factory\ObjectFactory;
  12 use Org\Mxchange\CoreFramework\Filesystem\FileNotFoundException;
  13 use Org\Mxchange\CoreFramework\Generic\FrameworkException;
  14
  15 // Import SPL stuff
  16 use \SplFileInfo;
  17
  18 /**
  19  * Database backend class for storing objects in locally created files.
  20  *
  21  * This class serializes arrays stored in the dataset instance and saves them
  22  * to local files. Every file (except 'info') represents a single line. Every
  23  * directory within the 'db' (base) directory represents a table.
  24  *
  25  * A configurable 'file_io_class' is being used as "storage backend".
  26  *
  27  * @author              Roland Haeder <webmaster@shipsimu.org>
  28  * @version             0.0.0
  29  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
  30  * @license             GNU GPL 3.0 or any newer version
  31  * @link                http://www.shipsimu.org
  32  *
  33  * This program is free software: you can redistribute it and/or modify
  34  * it under the terms of the GNU General Public License as published by
  35  * the Free Software Foundation, either version 3 of the License, or
  36  * (at your option) any later version.
  37  *
  38  * This program is distributed in the hope that it will be useful,
  39  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  40  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  41  * GNU General Public License for more details.
  42  *
  43  * You should have received a copy of the GNU General Public License
  44  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  45  */
  46 class CachedLocalFileDatabase extends BaseDatabaseBackend implements DatabaseBackend {
  47         /**
  48          * The file's extension
  49          */
  50         private $fileExtension = 'serialized';
  51
  52         /**
  53          * The last read file's name
  54          */
  55         private $lastFile = '';
  56
  57         /**
  58          * The last read file's content including header information
  59          */
  60         private $lastContents = array();
  61
  62         /**
  63          * Whether the "connection is already up
  64          */
  65         private $alreadyConnected = false;
  66
  67         /**
  68          * Table information array
  69          */
  70         private $tableInfo = array();
  71
  72         /**
  73          * Element for index
  74          */
  75         private $indexKey = '__idx';
  76
  77         /**
  78          * The protected constructor. Do never instance from outside! You need to
  79          * set a local file path. The class will then validate it.
  80          *
  81          * @return      void
  82          */
  83         protected function __construct () {
  84                 // Call parent constructor
  85                 parent::__construct(__CLASS__);
  86         }
  87
  88         /**
  89          * Create an object of CachedLocalFileDatabase and set the save path from
  90          * configuration for local files.
  91          *
  92          * @return      $databaseInstance       An instance of CachedLocalFileDatabase
  93          */
  94         public static final function createCachedLocalFileDatabase () {
  95                 // Get an instance
  96                 $databaseInstance = new CachedLocalFileDatabase();
  97
  98                 // Get a new compressor channel instance
  99                 $compressorInstance = ObjectFactory::createObjectByConfiguredName('compressor_channel_class');
 100
 101                 // Set the compressor channel
 102                 $databaseInstance->setCompressorChannel($compressorInstance);
 103
 104                 // Get a file IO handler
 105                 $fileIoInstance = ObjectFactory::createObjectByConfiguredName('file_io_class');
 106
 107                 // ... and set it
 108                 $databaseInstance->setFileIoInstance($fileIoInstance);
 109
 110                 // "Connect" to the database
 111                 $databaseInstance->connectToDatabase();
 112
 113                 // Return database instance
 114                 return $databaseInstance;
 115         }
 116
 117         /**
 118          * Setter for the last read file
 119          *
 120          * @param       $infoInstance   The FQFN of the last read file
 121          * @return      void
 122          */
 123         private final function setLastFile (SplFileInfo $infoInstance) {
 124                 // Cast string and set it
 125                 $this->lastFile = $infoInstance;
 126         }
 127
 128         /**
 129          * Getter for last read file
 130          *
 131          * @return      $lastFile       The last read file's name with full path
 132          */
 133         public final function getLastFile () {
 134                 return $this->lastFile;
 135         }
 136
 137         /**
 138          * Setter for contents of the last read file
 139          *
 140          * @param               $contents       An array with header and data elements
 141          * @return      void
 142          */
 143         private final function setLastFileContents (array $contents) {
 144                 // Set array
 145                 $this->lastContents = $contents;
 146         }
 147
 148         /**
 149          * Getter for last read file's content as an array
 150          *
 151          * @return      $lastContent    The array with elements 'header' and 'data'.
 152          */
 153         public final function getLastContents () {
 154                 return $this->lastContents;
 155         }
 156
 157         /**
 158          * Getter for file extension
 159          *
 160          * @return      $fileExtension  The array with elements 'header' and 'data'.
 161          */
 162         public final function getFileExtension () {
 163                 return $this->fileExtension;
 164         }
 165
 166         /**
 167          * Getter for index key
 168          *
 169          * @return      $indexKey       Index key
 170          */
 171         public final function getIndexKey () {
 172                 return $this->indexKey;
 173         }
 174
 175         /**
 176          * Reads a local data file  and returns it's contents in an array
 177          *
 178          * @param       $infoInstance   An instance of a SplFileInfo class
 179          * @return      $dataArray
 180          */
 181         private function getDataArrayFromFile (SplFileInfo $infoInstance) {
 182                 // Debug message
 183                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: Reading elements from database file ' . $infoInstance . ' ...');
 184
 185                 // Init compressed data
 186                 $compressedData = $this->getFileIoInstance()->loadFileContents($infoInstance);
 187                 $compressedData = $compressedData['data'];
 188
 189                 // Decompress it
 190                 $serializedData = $this->getCompressorChannel()->getCompressor()->decompressStream($compressedData);
 191
 192                 // Unserialize it
 193                 $dataArray = json_decode($serializedData, true);
 194
 195                 // Debug message
 196                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: Read ' . count($dataArray) . ' elements from database file ' . $infoInstance . '.');
 197                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: dataArray=' . print_r($dataArray, true));
 198
 199                 // Finally return it
 200                 return $dataArray;
 201         }
 202
 203         /**
 204          * Writes data array to local file
 205          *
 206          * @param       $infoInstance   An instance of a SplFileInfo class
 207          * @param       $dataArray      An array with all the data we shall write
 208          * @return      void
 209          */
 210         private function writeDataArrayToFqfn (SplFileInfo $infoInstance, array $dataArray) {
 211                 // Debug message
 212                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: Flushing ' . count($dataArray) . ' elements to database file ' . $infoInstance . ' ...');
 213                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: dataArray=' . print_r($dataArray, true));
 214
 215                 // Serialize and compress it
 216                 $compressedData = $this->getCompressorChannel()->getCompressor()->compressStream(json_encode($dataArray));
 217
 218                 // Write data
 219                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: Writing ' . strlen($compressedData) . ' bytes ...');
 220
 221                 // Write this data BASE64 encoded to the file
 222                 $this->getFileIoInstance()->saveStreamToFile($infoInstance, $compressedData, $this);
 223
 224                 // Debug message
 225                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: Flushing ' . count($dataArray) . ' elements to database file completed.');
 226         }
 227
 228         /**
 229          * Getter for table information file contents or an empty if info file was not created
 230          *
 231          * @param       $dataSetInstance        An instance of a database set class
 232          * @return      $infoArray                      An array with all table informations
 233          */
 234         private function getContentsFromTableInfoFile (StoreableCriteria $dataSetInstance) {
 235                 // Default content is no data
 236                 $infoArray = array();
 237
 238                 // Create FQFN for getting the table information file
 239                 $infoInstance = $this->generateFileFromDataSet($dataSetInstance, 'info');
 240
 241                 // Get the file contents
 242                 try {
 243                         $infoArray = $this->getDataArrayFromFile($infoInstance);
 244                 } catch (FileNotFoundException $e) {
 245                         // Not found, so ignore it here
 246                 }
 247
 248                 // ... and return it
 249                 return $infoArray;
 250         }
 251
 252         /**
 253          * Generates a file info class from given dataset instance and string
 254          *
 255          * @param       $dataSetInstance        An instance of a database set class
 256          * @param       $rowName                        Name of the row
 257          * @return      $infoInstance           An instance of a SplFileInfo class
 258          */
 259         private function generateFileFromDataSet (Criteria $dataSetInstance, $rowName) {
 260                 // Instanciate new file object
 261                 $infoInstance = new SplFileInfo($this->getConfigInstance()->getConfigEntry('local_database_path') . $dataSetInstance->getTableName() . DIRECTORY_SEPARATOR . $rowName . '.' . $this->getFileExtension());
 262
 263                 // Return it
 264                 return $infoInstance;
 265         }
 266
 267         /**
 268          * Creates the table info file from given dataset instance
 269          *
 270          * @param       $dataSetInstance        An instance of a database set class
 271          * @return      void
 272          */
 273         private function createTableInfoFile (StoreableCriteria $dataSetInstance) {
 274                 // Create FQFN for creating the table information file
 275                 $infoInstance = $this->generateFileFromDataSet($dataSetInstance, 'info');
 276
 277                 // Get the data out from dataset in a local array
 278                 $this->tableInfo[$dataSetInstance->getTableName()] = array(
 279                         'primary'      => $dataSetInstance->getPrimaryKey(),
 280                         'created'      => time(),
 281                         'last_updated' => time()
 282                 );
 283
 284                 // Write the data to the file
 285                 $this->writeDataArrayToFqfn($infoInstance, $this->tableInfo[$dataSetInstance->getTableName()]);
 286         }
 287
 288         /**
 289          * Updates the table info file from given dataset instance
 290          *
 291          * @param       $dataSetInstance        An instance of a database set class
 292          * @return      void
 293          */
 294         private function updateTableInfoFile (StoreableCriteria $dataSetInstance) {
 295                 // Get table name from criteria
 296                 $tableName = $dataSetInstance->getTableName();
 297
 298                 // Create FQFN for creating the table information file
 299                 $infoInstance = $this->generateFileFromDataSet($dataSetInstance, 'info');
 300
 301                 // Get the data out from dataset in a local array
 302                 $this->tableInfo[$tableName]['primary']      = $dataSetInstance->getPrimaryKey();
 303                 $this->tableInfo[$tableName]['last_updated'] = time();
 304
 305                 // Write the data to the file
 306                 $this->writeDataArrayToFqfn($infoInstance, $this->tableInfo[$tableName]);
 307         }
 308
 309         /**
 310          * Updates the primary key information or creates the table info file if not found
 311          *
 312          * @param       $dataSetInstance        An instance of a database set class
 313          * @return      void
 314          */
 315         private function updatePrimaryKey (StoreableCriteria $dataSetInstance) {
 316                 // Get table name from criteria
 317                 $tableName = $dataSetInstance->getTableName();
 318
 319                 // Get the information array from lower method
 320                 $infoArray = $this->getContentsFromTableInfoFile($dataSetInstance);
 321
 322                 // Is the primary key there?
 323                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: tableInfo=' . print_r($this->tableInfo, true));
 324                 if (!isset($this->tableInfo[$tableName]['primary'])) {
 325                         // Then create the info file
 326                         $this->createTableInfoFile($dataSetInstance);
 327                 } elseif (($this->getConfigInstance()->getConfigEntry('db_update_primary_forced') == 'Y') && ($dataSetInstance->getPrimaryKey() != $this->tableInfo[$tableName]['primary'])) {
 328                         // Set the array element
 329                         $this->tableInfo[$tableName]['primary'] = $dataSetInstance->getPrimaryKey();
 330
 331                         // Update the entry
 332                         $this->updateTableInfoFile($dataSetInstance);
 333                 }
 334         }
 335
 336         /**
 337          * Makes sure that the database connection is alive
 338          *
 339          * @return      void
 340          * @todo        Do some checks on the database directory and files here
 341          */
 342         public function connectToDatabase () {
 343         }
 344
 345         /**
 346          * Starts a SELECT query on the database by given return type, table name
 347          * and search criteria
 348          *
 349          * @param       $tableName                      Name of the database table
 350          * @param       $searchInstance         Local search criteria class
 351          * @return      $resultData                     Result data of the query
 352          * @throws      UnsupportedCriteriaException    If the criteria is unsupported
 353          * @throws      SqlException                                    If an 'SQL error' occurs
 354          */
 355         public function querySelect ($tableName, LocalSearchCriteria $searchInstance) {
 356                 // Debug message
 357                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: tableName=' . $tableName . ' - CALLED!');
 358
 359                 // The result is null by any errors
 360                 $resultData = NULL;
 361
 362                 // Create full path name
 363                 $pathName = $this->getConfigInstance()->getConfigEntry('local_database_path') . $tableName . DIRECTORY_SEPARATOR;
 364
 365                 /*
 366                  * A 'select' query is not that easy on local files, so first try to
 367                  * find the 'table' which is in fact a directory on the server
 368                  */
 369                 try {
 370                         // Get a directory pointer instance
 371                         $directoryInstance = ObjectFactory::createObjectByConfiguredName('directory_class', array($pathName));
 372
 373                         // Initialize the result data, this need to be rewritten e.g. if a local file cannot be read
 374                         $resultData = array(
 375                                 BaseDatabaseBackend::RESULT_INDEX_STATUS => self::RESULT_OKAY,
 376                                 BaseDatabaseBackend::RESULT_INDEX_ROWS   => array()
 377                         );
 378
 379                         // Initialize limit/skip
 380                         $limitFound = 0;
 381                         $skipFound = 0;
 382                         $idx = 1;
 383
 384                         // Read the directory with some exceptions
 385                         while (($fileInfoInstance = $directoryInstance->readDirectoryExcept(array('.htaccess', 'info.' . $this->getFileExtension()))) && (($limitFound < $searchInstance->getLimit()) || ($searchInstance->getLimit() == 0))) {
 386                                 // Debug message
 387                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: fileInstance.extension=' . $fileInfoInstance->getExtension() . ',this->getFileExtension()=' . $this->getFileExtension());
 388
 389                                 // Does the extension match?
 390                                 if ($fileInfoInstance->getExtension() !== $this->getFileExtension()) {
 391                                         // Skip this file!
 392                                         continue;
 393                                 } // END - if
 394
 395                                 // Read the file
 396                                 $dataArray = $this->getDataArrayFromFile($fileInfoInstance);
 397                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: fileInfoInstance.pathname=' . $fileInfoInstance->getPathname() . ',dataArray='.print_r($dataArray, true));
 398
 399                                 // Is this an array?
 400                                 if (is_array($dataArray)) {
 401                                         // Default is nothing found
 402                                         $isFound = true;
 403
 404                                         // Search in the criteria with FMFW (First Matches, First Wins)
 405                                         foreach ($dataArray as $key => $value) {
 406                                                 // Make sure value is not bool
 407                                                 assert(!is_bool($value));
 408
 409                                                 // Found one entry?
 410                                                 $isFound = (($isFound === true) && ($searchInstance->isCriteriaMatching($key, $value)));
 411                                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: key=' . $key . ',value=' . $value . ',isFound=' . intval($isFound));
 412                                         } // END - foreach
 413
 414                                         // Is all found?
 415                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: isFound=' . intval($isFound) . ',limitFound=' . $limitFound . ',limit=' . $searchInstance->getLimit());
 416                                         if ($isFound === true) {
 417                                                 // Shall we skip this entry?
 418                                                 if ($searchInstance->getSkip() > 0) {
 419                                                         // We shall skip some entries
 420                                                         if ($skipFound < $searchInstance->getSkip()) {
 421                                                                 // Skip this entry
 422                                                                 $skipFound++;
 423                                                                 break;
 424                                                         } // END - if
 425                                                 } // END - if
 426
 427                                                 // Set id number
 428                                                 $dataArray[$this->getIndexKey()] = $idx;
 429
 430                                                 // Entry found!
 431                                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: indexKey=' . $this->getIndexKey() . ',idx=' . $idx . ',dataArray=' . print_r($dataArray, true));
 432                                                 array_push($resultData[BaseDatabaseBackend::RESULT_INDEX_ROWS], $dataArray);
 433
 434                                                 // Count found entries up
 435                                                 $limitFound++;
 436                                         } // END - if
 437                                 } else {
 438                                         // Throw an exception here
 439                                         throw new SqlException(array($this, sprintf('File &#39;%s&#39; contains invalid data.', $fileInfoInstance->getPathname()), self::DB_CODE_DATA_FILE_CORRUPT), self::EXCEPTION_SQL_QUERY);
 440                                 }
 441
 442                                 // Count entry up
 443                                 $idx++;
 444                         } // END - while
 445
 446                         // Close directory and throw the instance away
 447                         $directoryInstance->closeDirectory();
 448                         unset($directoryInstance);
 449
 450                         // Reset last exception
 451                         $this->resetLastException();
 452                 } catch (PathIsNoDirectoryException $e) {
 453                         // Path not found means "table not found" for real databases...
 454                         $this->setLastException($e);
 455
 456                         // So throw an SqlException here with faked error message
 457                         throw new SqlException (array($this, sprintf('Table &#39;%s&#39; not found', $tableName), self::DB_CODE_TABLE_MISSING), self::EXCEPTION_SQL_QUERY);
 458                 } catch (FrameworkException $e) {
 459                         // Catch all exceptions and store them in last error
 460                         $this->setLastException($e);
 461                 }
 462
 463                 // Return the gathered result
 464                 return $resultData;
 465         }
 466
 467         /**
 468          * "Inserts" a data set instance into a local file database folder
 469          *
 470          * @param       $dataSetInstance        A storeable data set
 471          * @return      void
 472          * @throws      SqlException    If an SQL error occurs
 473          */
 474         public function queryInsertDataSet (StoreableCriteria $dataSetInstance) {
 475                 // Try to save the request away
 476                 try {
 477                         // Create full path name
 478                         $infoInstance = $this->generateFileFromDataSet($dataSetInstance, md5($dataSetInstance->getUniqueValue()));
 479
 480                         // Write the data away
 481                         $this->writeDataArrayToFqfn($infoInstance, $dataSetInstance->getCriteriaArray());
 482
 483                         // Update the primary key
 484                         $this->updatePrimaryKey($dataSetInstance);
 485
 486                         // Reset last exception
 487                         $this->resetLastException();
 488                 } catch (FrameworkException $e) {
 489                         // Catch all exceptions and store them in last error
 490                         $this->setLastException($e);
 491
 492                         // Throw an SQL exception
 493                         throw new SqlException(array($this, sprintf('Cannot write data to table &#39;%s&#39;, is the table created?', $dataSetInstance->getTableName()), self::DB_CODE_TABLE_UNWRITEABLE), self::EXCEPTION_SQL_QUERY);
 494                 }
 495         }
 496
 497         /**
 498          * "Updates" a data set instance with a database layer
 499          *
 500          * @param       $dataSetInstance        A storeable data set
 501          * @return      void
 502          * @throws      SqlException    If an SQL error occurs
 503          */
 504         public function queryUpdateDataSet (StoreableCriteria $dataSetInstance) {
 505                 // Create full path name
 506                 $pathName = $this->getConfigInstance()->getConfigEntry('local_database_path') . $dataSetInstance->getTableName() . DIRECTORY_SEPARATOR;
 507
 508                 // Try all the requests
 509                 try {
 510                         // Get a file pointer instance
 511                         $directoryInstance = ObjectFactory::createObjectByConfiguredName('directory_class', array($pathName));
 512
 513                         // Initialize limit/skip
 514                         $limitFound = 0;
 515                         $skipFound = 0;
 516
 517                         // Get the criteria array from the dataset
 518                         $searchArray = $dataSetInstance->getCriteriaArray();
 519
 520                         // Get search criteria
 521                         $searchInstance = $dataSetInstance->getSearchInstance();
 522
 523                         // Read the directory with some exceptions
 524                         while (($fileInfoInstance = $directoryInstance->readDirectoryExcept(array('.htaccess', 'info.' . $this->getFileExtension()))) && (($limitFound < $searchInstance->getLimit()) || ($searchInstance->getLimit() == 0))) {
 525                                 // Debug message
 526                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: fileInstance.extension=' . $fileInfoInstance->getExtension() . ',this->getFileExtension()=' . $this->getFileExtension());
 527
 528                                 // Does the extension match?
 529                                 if ($fileInfoInstance->getExtension() !== $this->getFileExtension()) {
 530                                         // Debug message
 531                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: fileInfoInstance.extension=' . $fileInfoInstance->getExtension() . ',getFileExtension()=' . $this->getFileExtension() . ' - SKIPPED!');
 532                                         // Skip this file!
 533                                         continue;
 534                                 } // END - if
 535
 536                                 // Open this file for reading
 537                                 $dataArray = $this->getDataArrayFromFile($fileInfoInstance);
 538                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: fileInfoInstance.pathname=' . $fileInfoInstance->getPathname() . ',dataArray='.print_r($dataArray, true));
 539
 540                                 // Is this an array?
 541                                 if (is_array($dataArray)) {
 542                                         // Default is nothing found
 543                                         $isFound = true;
 544
 545                                         // Search in the criteria with FMFW (First Matches, First Wins)
 546                                         foreach ($dataArray as $key => $value) {
 547                                                 // Make sure value is not bool
 548                                                 assert(!is_bool($value));
 549
 550                                                 // Found one entry?
 551                                                 $isFound = (($isFound === true) && ($searchInstance->isCriteriaMatching($key, $value)));
 552                                         } // END - foreach
 553
 554                                         // Is all found?
 555                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: isFound=' . intval($isFound));
 556                                         if ($isFound === true) {
 557                                                 // Shall we skip this entry?
 558                                                 if ($searchInstance->getSkip() > 0) {
 559                                                         // We shall skip some entries
 560                                                         if ($skipFound < $searchInstance->getSkip()) {
 561                                                                 // Skip this entry
 562                                                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: Found entry, but skipping ...');
 563                                                                 $skipFound++;
 564                                                                 break;
 565                                                         } // END - if
 566                                                 } // END - if
 567
 568                                                 // Entry found, so update it
 569                                                 foreach ($searchArray as $searchKey => $searchValue) {
 570                                                         // Make sure the value is not bool again
 571                                                         assert(!is_bool($searchValue));
 572                                                         assert($searchKey != $this->indexKey);
 573
 574                                                         // Debug message + add/update it
 575                                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: criteriaKey=' . $searchKey . ',criteriaValue=' . $searchValue);
 576                                                         $dataArray[$searchKey] = $searchValue;
 577                                                 } // END - foreach
 578
 579                                                 // Write the data to a local file
 580                                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: Writing dataArray()=' . count($dataArray) . ' to ' . $fileInfoInstance->getPathname() . ' ...');
 581                                                 $this->writeDataArrayToFqfn($fileInfoInstance, $dataArray);
 582
 583                                                 // Count found entries up
 584                                                 $limitFound++;
 585                                         } // END - if
 586                                 } // END - if
 587                         } // END - while
 588
 589                         // Close the file pointer
 590                         $directoryInstance->closeDirectory();
 591
 592                         // Update the primary key
 593                         $this->updatePrimaryKey($dataSetInstance);
 594
 595                         // Reset last exception
 596                         $this->resetLastException();
 597                 } catch (FrameworkException $e) {
 598                         // Catch all exceptions and store them in last error
 599                         $this->setLastException($e);
 600
 601                         // Throw an SQL exception
 602                         throw new SqlException(array($this, sprintf('Cannot write data to table &#39;%s&#39;, is the table created? Exception: %s, message:%s', $dataSetInstance->getTableName(), $e->__toString(), $e->getMessage()), self::DB_CODE_TABLE_UNWRITEABLE), self::EXCEPTION_SQL_QUERY);
 603                 }
 604         }
 605
 606         /**
 607          * Getter for primary key of specified table or if not found null will be
 608          * returned. This must be database-specific.
 609          *
 610          * @param       $tableName              Name of the table we need the primary key from
 611          * @return      $primaryKey             Primary key column of the given table
 612          */
 613         public function getPrimaryKeyOfTable ($tableName) {
 614                 // Default key is null
 615                 $primaryKey = NULL;
 616
 617                 // Does the table information exist?
 618                 if (isset($this->tableInfo[$tableName])) {
 619                         // Then return the primary key
 620                         $primaryKey = $this->tableInfo[$tableName]['primary'];
 621                 } // END - if
 622
 623                 // Return the column
 624                 return $primaryKey;
 625         }
 626
 627         /**
 628          * Removes non-public data from given array.
 629          *
 630          * @param       $data   An array with possible non-public data that needs to be removed.
 631          * @return      $data   A cleaned up array with only public data.
 632          * @todo        Add more generic non-public data for removal
 633          */
 634         public function removeNonPublicDataFromArray (array $data) {
 635                 // Remove '__idx'
 636                 unset($data[$this->indexKey]);
 637
 638                 // Return it
 639                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: data[' . gettype($data) . ']='.print_r($data, true));
 640                 return $data;
 641         }
 642
 643         /**
 644          * Counts total rows of given table
 645          *
 646          * @param       $tableName      Table name
 647          * @return      $count          Total rows of given table
 648          */
 649         public function countTotalRows($tableName) {
 650                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: tableName=' . $tableName . ' - CALLED!');
 651
 652                 // Create full path name
 653                 $pathName = $this->getConfigInstance()->getConfigEntry('local_database_path') . $tableName . DIRECTORY_SEPARATOR;
 654
 655                 // Try all the requests
 656                 try {
 657                         // Get a file pointer instance
 658                         $directoryInstance = ObjectFactory::createObjectByConfiguredName('directory_class', array($pathName));
 659
 660                         // Initialize counter
 661                         $count = 0;
 662
 663                         // Read the directory with some exceptions
 664                         while ($fileInfoInstance = $directoryInstance->readDirectoryExcept(array('.htaccess', 'info.' . $this->getFileExtension()))) {
 665                                 // Debug message
 666                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: fileInstance.extension=' . $fileInfoInstance->getExtension() . ',this->getFileExtension()=' . $this->getFileExtension());
 667
 668                                 // Does the extension match?
 669                                 if ($fileInfoInstance->getExtension() !== $this->getFileExtension()) {
 670                                         // Debug message
 671                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: fileInfoInstance.extension=' . $fileInfoInstance->getExtension() . ',getFileExtension()=' . $this->getFileExtension() . ' - SKIPPED!');
 672                                         // Skip this file!
 673                                         continue;
 674                                 } // END - if
 675
 676                                 // Count this row up
 677                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: fileInfoInstance.pathname=' . $fileInfoInstance->getPathname() . ',getFileExtension()=' . $this->getFileExtension() . ' - COUNTED!');
 678                                 $count++;
 679                         } // END - while
 680                 } catch (FrameworkException $e) {
 681                         // Catch all exceptions and store them in last error
 682                         $this->setLastException($e);
 683
 684                         // Throw an SQL exception
 685                         throw new SqlException(array($this, sprintf('Cannot count on table &#39;%s&#39;, is the table created?', $dataSetInstance->getTableName()), self::DB_CODE_TABLE_NOT_FOUND), self::EXCEPTION_SQL_QUERY);
 686                 }
 687
 688                 // Return count
 689                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('DATABASE: tableName=' . $tableName . ',count=' . $count . ' - EXIT!');
 690                 return $count;
 691         }
 692
 693 }