public function parameters()
	{
		$build = array();

		foreach (get_class_methods($this) as $method)
		{
			if (substr($method, -strlen('Parameter')) !== 'Parameter')
			{
				continue;
			}

			if ($called = call_user_func(array($this, $method)))
			{
				$build = array_replace($build, $called);
			}
		}

		return '?' . http_build_query($build);
	}