/**
  * Returns the object with the (internal) identifier, if it is known to the
  * backend. Otherwise NULL is returned.
  *
  * @param string $identifier
  * @return object The object for the identifier if it is known, or NULL
  * @author Karsten Dambekalns <*****@*****.**>
  * @api
  */
 public function getObjectByIdentifier($identifier)
 {
     if ($this->persistenceSession->hasIdentifier($identifier)) {
         return $this->persistenceSession->getObjectByIdentifier($identifier);
     } else {
         $objectData = $this->backend->getObjectDataByIdentifier($identifier);
         if ($objectData !== FALSE) {
             return $this->dataMapper->mapToObject($objectData);
         } else {
             return NULL;
         }
     }
 }
 /**
  * Maps a single record into the object it represents and registers it as
  * reconstituted with the session.
  *
  * @param array $objectData
  * @return object
  * @author Karsten Dambekalns <*****@*****.**>
  */
 public function mapToObject(array $objectData)
 {
     if ($this->persistenceSession->hasIdentifier($objectData['identifier'])) {
         return $this->persistenceSession->getObjectByIdentifier($objectData['identifier']);
     } else {
         $className = $objectData['classname'];
         $classSchema = $this->reflectionService->getClassSchema($className);
         $objectConfiguration = $this->objectManager->getObjectConfiguration($className);
         $object = $this->objectBuilder->createEmptyObject($className, $objectConfiguration);
         $this->persistenceSession->registerObject($object, $objectData['identifier']);
         $this->objectBuilder->reinjectDependencies($object, $objectConfiguration);
         $this->thawProperties($object, $objectData['identifier'], $objectData, $classSchema);
         $object->FLOW3_Persistence_memorizeCleanState();
         $this->persistenceSession->registerReconstitutedObject($object);
         return $object;
     }
 }