[FLOW3-general] AOP question

[Fernando Arconada]

Hello 
I want to map an argument passed as Json to an Entity for a controller 
action. I've tried with AOP. But I dont know how to modify the argument 
or reinject the new request. ¿ideas?

----------- Action -----------------
    public function saveAction(\F3\Sifpe\Domain\Model\Empresa $empresa) {
           //do something
	}

----------- Aspect --------------
    /**
     *
     * @before method(F3\Sifpe\Controller\EmpresaController->saveAction())
     * @param \F3\FLOW3\AOP\JoinPointInterface $joinPoint The current 
join point
     * @return void
     */
    public function mapEmpresaJsonToEntity(\F3\FLOW3\AOP
\JoinPointInterface $joinPoint){
        $empresaJson = $joinPoint->getMethodArgument('empresa');
        // do something with the json
        $empresaEntity = new \F3\Sifpe\Domain\Model\Empresa();
        $myController = $joinPoint->getProxy();
        $request = $myController->getControllerContext()->getRequest()-
>setArgument('empresa',$empresaEntity);
        var_dump($joinPoint->getMethodName());
    }

------------------ comments -----------------------
* Use Json as parameter in my action is not conceptually clear: my action 
has to persist an Entity not to manage Json
* use a JoinPoint in a point before saveAction like initializeAction or 
similar isnt also clear cause then I need to switch-case (very ugly)
* ¿a requestHandler? dont know, I could solve this problem, but It will 
be better a gerneral solution to change arguments of a method before 
execution