public function getAdapterAlias()
    {
        if ('__undefined__' == $this->adapterAlias) {
            $this->adapterAlias = null;
            $annotations = $this->inspector->getClassAnnotations();
            if ($annotations->hasAnnotation('@adapter')) {
                $this->adapterAlias = $annotations
                    ->getAnnotation('@adapter')
                    ->getValue();
            }
        }
        return $this->adapterAlias;
    }