/**
  * Gets the full class name for the given entity
  *
  * @param string $entityName The name of the entity. Can be bundle:entity or full class name
  * @return string The full class name
  * @throws \InvalidArgumentException
  */
 public function getEntityClass($entityName)
 {
     $split = explode(':', $entityName);
     if (count($split) <= 1) {
         // The given entity name is not in bundle:entity format. Suppose that it is the full class name
         return $entityName;
     } elseif (count($split) > 2) {
         throw new \InvalidArgumentException(sprintf('Incorrect entity name: %s. Expected the full class name or bundle:entity.', $entityName));
     }
     return $this->doctrine->getAliasNamespace($split[0]) . '\\' . $split[1];
 }