public function __construct(Configuration $configuration = null, $isDevMode = true, $tablePrefixString = 'AM_')
{
if ($configuration === null) {
$configuration = new Configuration();
}
$doctrineConfig = Doctrine\ORM\Tools\Setup::createAnnotationMetadataConfiguration($configuration->getEntityPaths(), $isDevMode);
$conn = array('pdo' => $configuration->getPDOInstance());
$tablePrefix = new TablePrefix($tablePrefixString);
$eventManager = new Doctrine\Common\EventManager();
$eventManager->addEventListener(Doctrine\ORM\Events::loadClassMetadata, $tablePrefix);
$this->entityManager = Doctrine\ORM\EntityManager::create($conn, $doctrineConfig, $eventManager);
$this->classes = $this->entityManager->getMetadataFactory()->getAllMetadata();
$this->schemaTool = new Doctrine\ORM\Tools\SchemaTool($this->entityManager);
}
