public function getNamespaceFactory() {
		if ($this->_namespacesFactory === null) {
			if ($this instanceof LocatorAwareInterface && $this->hasLocator()) {
				$this->_namespacesFactory = $this->getLocator()->get($this->getSessionNamespaceFactoryServiceId());
				
				if (! $this->_namespacesFactory instanceof NamespaceFactoryInterface) {
					throw new NoNamespacesFactory('Namespace\'s factory must implement the "HelpersLocatorInterface"');
				}
			} else {
				throw new NoNamespacesFactory('No namespace\'s factory been supplied, also unable to obtain one through locator');
			}
		}
		
		return $this->_namespacesFactory;
	}