public function __construct(SessionInterface $session, Configuration $config = null, EventManager $evm = null)
{
$this->session = $session;
$this->config = $config ?: new Configuration();
$this->evm = $evm ?: new EventManager();
$this->metadataFactory = new ClassMetadataFactory($this);
$this->unitOfWork = new UnitOfWork($this);
$this->proxyFactory = new ProxyFactory($this, $this->config->getProxyDir(), $this->config->getProxyNamespace(), $this->config->getAutoGenerateProxyClasses());
// initialize default translation strategies
$this->translationStrategy = array('attribute' => new AttributeTranslationStrategy(), 'child' => new ChildTranslationStrategy());
}
