[TYPO3-dev] Hooks with interface

[Malte Jansen]

Hi Steffen,

you could create a second interface, which is extended by the old one.

So you just have to check in the code, if the interface is an instanceOf 
  second interface.

e.g.

interface MyHook {
   some functions...
}

interface MyBetterHook extends MyHook {
   additional functions...
}

class MyClass {

   1. load functions with instanceOf MyHook... (there is a PHP-function 
for getting the classes, without reflection)
   2. run MyHook things
      and
      run MyBetterHook things, checking the instanceOf MyBetterHook before.
}

Cheers,

Malte

Steffen Kamper schrieb:
> Hi,
> 
> now we have the rule that new hooks has to come with an interface. That 
> is good as everyone see in interface which hooks are present and how to 
> implement them.
> But - If we extend the interface with a new method, all extensions using 
> the interface won't work any more as they don't have the new method in 
> the hook, which i think is a big problem.
> See as example t3lib_tceformsInlineHook where it will needed one day to 
> implement a new method as the interface is for the complete class.
> 
> How to prevent such future errors?
> 
> vg Steffen