public function read_cache($cache_id)
	{
		// make sure we have all config data
		empty($this->cache_dir) and $this->cache_dir = \Config::get('cache_dir', APPPATH.'cache/');
		empty($this->cache_lifetime) and $this->cache_lifetime = \Config::get('cache_lifetime', 3600);

		if ($cached = $this->cache($cache_id))
		{
			$this->cached_paths = $cached;
		}
	}