Best way to throw exception and avoid code duplication
- by JF Dion
I am currently writing code and want to make sure all the params that get passed to a function/method are valid. Since I am writing in PHP I don't have access to all the facilities of other languages like C, C++ or Java to check for parameters values and types
public function inscriptionExists($sectionId, $userId) // PHP
vs.
public boolean inscriptionExists(int sectionId, int userId) // Java
So I have to rely on exceptions if I want to make sure that my params are both integers.
Since I have a lot of places where I need to check for param validity, what would be the best way to create a validation/exception machine and avoid code duplication?
I was thinking on a static factory (since I don't want to pass it to all of my classes) with a signature like:
public static function factory ($value, $valueType, $exceptionType = 'InvalidArgumentException');
Which would then call the right sub process to validate based on the type.
Am I on the right way, or am I going completely off the road and overthinking my problem?
