[TYPO3-mvc] Interfaces or abstract classes as action arguments?

[Dennis Ahrens]

Hi Jochen,

Jochen Rau wrote:
> This should already work without passing the class via GET/POST. But you have to configure the class hierarchy via TS. Search this list for "Single Table Inheritance" for an example.

it is not working with and without single table inheritance by 
configuring the subclasses in TS.

i've tested for a class where single table inheritance works - when 
calling an action looking like this 
(Tx_FhhQmdocs_Domain_Model_ContentConfiguration is an abstract class 
that has three subclasses configured):

/**
  *
  * @param Tx_FhhQmdocs_Domain_Model_ContentConfiguration 
$contentConfiguration
  */
public function testAction($contentConfiguration) {
	
}

PHP tells me:
Fatal error: Cannot instantiate abstract class 
Tx_FhhQmdocs_Domain_Model_ContentConfiguration in 
/home/dahrens/t3/TYPO3_core_svn/t3lib/class.t3lib_div.php on line 5210

I've digged a bit deeper and found out that the ValidatorResolver likes 
to instantiate the class that is annotated for the argument.

Here is the end of the stacktrace:
12 t3lib_div::makeInstance("Tx_FhhQmdocs_Domain_Model_ContentConfiguration")
11 
Tx_Extbase_Object_Manager::makeInstance("Tx_FhhQmdocs_Domain_Model_ContentConfiguration", 
array)
10 
Tx_Extbase_Object_Manager::getObject("Tx_FhhQmdocs_Domain_Model_ContentConfiguration")
9 
Tx_Extbase_Validation_ValidatorResolver::createValidator("Tx_FhhQmdocs_Domain_Model_ContentConfiguration")
8 
Tx_Extbase_Validation_ValidatorResolver::buildMethodArgumentsValidatorConjunctions("Tx_FhhQmdocs_Controller_ContentConfigurationController", 
"testAction")
7 
Tx_Extbase_MVC_Controller_ActionController::initializeActionMethodValidators()

regards
Dennis