Doctrine\DBAL\DBALException::invalidPlatformSpecified PHP 메소드

    public static function invalidPlatformSpecified()
    {
        return new self("Invalid 'platform' option specified, need to give an instance of " . "\\Doctrine\\DBAL\\Platforms\\AbstractPlatform.");
    }

 /**
  * Initializes a new instance of the Connection class.
  *
  * @param array                              $params       The connection parameters.
  * @param \Doctrine\DBAL\Driver              $driver       The driver to use.
  * @param \Doctrine\DBAL\Configuration|null  $config       The configuration, optional.
  * @param \Doctrine\Common\EventManager|null $eventManager The event manager, optional.
  *
  * @throws \Doctrine\DBAL\DBALException
  */
 public function __construct(array $params, Driver $driver, Configuration $config = null, EventManager $eventManager = null)
 {
     $this->_driver = $driver;
     $this->_params = $params;
     if (isset($params['pdo'])) {
         $this->_conn = $params['pdo'];
         $this->_isConnected = true;
     }
     // Create default config and event manager if none given
     if (!$config) {
         $config = new Configuration();
     }
     if (!$eventManager) {
         $eventManager = new EventManager();
     }
     $this->_config = $config;
     $this->_eventManager = $eventManager;
     $this->_expr = new Query\Expression\ExpressionBuilder($this);
     if (!isset($params['platform'])) {
         $this->_platform = $driver->getDatabasePlatform();
     } else {
         if ($params['platform'] instanceof Platforms\AbstractPlatform) {
             $this->_platform = $params['platform'];
         } else {
             throw DBALException::invalidPlatformSpecified();
         }
     }
     $this->_platform->setEventManager($eventManager);
     $this->_transactionIsolationLevel = $this->_platform->getDefaultTransactionIsolationLevel();
 }