Union::setOrder

public function setOrder($order)
{
	$this->order = array();

	if (!is_array($order))
	{
		$order = array($order);
	}

	foreach ($order as $k => $v)
	{
		if (is_numeric($k))
		{
			$this->addOrder($v);
		}
		else
		{
			$this->addOrder($k, $v);
		}
	}

	return $this;
}