access parent class on class overwrites in magento, from a sibling

Question

It is required to overwrite customer_resource class. I added required config.xml options for resource rewriting, but when overwritten class method calls parent class method from itself, it actually called the parent method from which I extend to, nor the parent of Mage_Customer_Model_Resource_Customer:

  class My_Plugin_Model_Resource_Customer extends Mage_Customer_Model_Resource_Customer 
    {

    protected function _beforeSave(Varien_Object $customer){
        parent::_beforeSave($customer);
    ...
        }
    }

So, how to call parent method correctly in this case ? some kind of double downcasting is possible in PHP?

Update:

if found some solution, but not sure if it worked for me, cause via the customer_entity table it still not saves customer correctly:

        call_user_func(array(get_parent_class(get_parent_class($this)), 
                       '_beforeSave', $customer));

Answer 1

The easiest solution, in particular this case, was to call:

Mage_Eav_Model_Entity_Abstract::_beforeSave($customer);

as the required parent of Mage_Customer_Model_Resource_Customer is Mage_Eav_Model_Entity_Abstract it will call the grandparent.

also, there is method with ReflectionMethod->invoke()

more info here: https://stackoverflow.com/questions/12850802/how-to-call-grandparent-method-without-getting-e-strict-error