/**
* Creates a new EntityManager that operates on the given database connection
* and uses the given Configuration and EventManager implementations.
*
* @param Doctrine\DBAL\Connection $conn
* @param string $name
* @param Doctrine\ORM\Configuration $config
* @param Doctrine\Common\EventManager $eventManager
*/
protected function __construct(Connection $conn, Configuration $config, EventManager $eventManager)
{
$this->_conn = $conn;
$this->_config = $config;
$this->_eventManager = $eventManager;
$this->_metadataFactory = new ClassMetadataFactory($this->_config->getMetadataDriverImpl(), $this->_conn->getDatabasePlatform());
$this->_metadataFactory->setCacheDriver($this->_config->getMetadataCacheImpl());
$this->_unitOfWork = new UnitOfWork($this);
$this->_proxyGenerator = new DynamicProxyGenerator($this, $this->_config->getCacheDir());
}