protected function _getFileName($name){

		$name = trim($name);

		$name = iconv('ISO-8859-1', 'ASCII//TRANSLIT', $name);
		$name = preg_replace('/[^a-z0-9\-:]+/i', '_', $name);
		$name = str_replace(':', '.', $name);

		if($name == ''){

			throw new CacheException('Cache-entry name cannot be empty');
		}

		return "{$name}.cache";
	}