try{

	$customer = new inspired_customer();
	$customer->setPk(9);
	$customer->read();

	// product ids to test
	$ids = array(15,20,25);

	foreach($ids as $id)
	{
		$object = new inspired_product();
		$object->set('productid', $id);
		$object->read();
		$objects[] = $object;
	}

	// Setup the decorators
	$decorator = new decorator(
		array(
			new inspired_product_decorator_discount_group($customer),
			new inspired_product_decorator_discount_category(),
		)
	);

	$decorator->setObjects($objects);
	$decorator->decorate();

	foreach($decorator->getObjects() as $product){
		echo '<hr>';
		echo $product->getPk().' '.$product->prodname.'<br>';
		var_dump($product->discounts);
	}

}catch(Exception $e)
{
   echo $e->getMessage().'<br>';
}

/*
 * This is the object which ties it all together...
 */
class decorator extends object
{
	protected $objects = array();
	protected $decorators = array();

	function __construct($decorators=false)
	{
		if($decorators) $this->setDecorators($decorators);
	}

	public function setObject(object &$object)
	{
		$this->objects[] = $object;
	}

	public function setObjects(&$objects)
	{
		if(is_array($objects)) foreach($objects as &$object)
		{
			$this->setObject($object);
		}
	}

	public function getObjects(){
		return $this->objects;
	}

	public function getObjectIds()
	{
		if(is_array($this->objects)) foreach($this->objects as $o)
		{
			$objectIds[] = $o->getPk();
		}

		return $objectIds;

	}

	public function setDecorator(decorator_base &$decorator)
	{
		$this->decorators[] = $decorator;
	}

	public function setDecorators($decorators)
	{
		if(is_array($decorators)) foreach($decorators as &$decorator)
		{
			$this->setDecorator($decorator);
		}
	}

	function decorate()
	{
		if(is_array($this->decorators)) foreach($this->decorators as &$decorator)
		{
			$decorator->setObjects($this->objects);
			$decorator->decorate();
		}
	}

}


class inspired_product_decorator_discount_group extends decorator_base implements decorator_interface{

	function __construct(inspired_customer $customer)
	{
		$this->customer = $customer;
	}

    function &getData()
    {

    	/*
    	 * Lookup the customer group & assicoated discount rules.
    	 */


    	/*
    	 * Note, can perform IN() queries based on these Ids;
    	 */
    	echo 'Calculating group discounts for productIds: '.implode(', ', $this->getObjectIds()).'<br>';

		foreach($this->objects as $o) {
			$data[$o->getPk()] = 5 + $o->getPk();
		}

        return $data;

    }

    function addData(&$object, &$data)
    {
        $object->discounts['group'] = $data;
    }

}



abstract class decorator_base extends decorator implements decorator_interface
{

	function decorate()
	{
		$data = $this->getData();

		foreach($this->objects as $o)
		{
			 
			// This decorator has further decoration to apply.
			if(is_array($this->decorators)) foreach($this->decorators as $d)
			{
				$d->setObjects($data[$o->getPk()]);
			}

			$this->addData($o, $data[$o->getPk()]);

		}

		if(is_array($this->decorators)) foreach($this->decorators as $d)
		{
			$d->decorate();
		}

	}

}

interface decorator_interface
{
	
	function decorate();

	function &getData();
	
	function addData(&$object, &$data);
	
}