Does Kotlin yet have a way to require that impleme...

# android

[Ben Piatt]

Does Kotlin yet have a way to require that implementors of an interface method call super?

[Casey Kulm]

interfaces don’t have any idea of inheritance so super wouldn’t mean anything in Kotlin or Java

[Ben Piatt]

I disagree, interfaces can inherit from one another. I’m actively doing so in a project of mine

[Ben Piatt]

I’m using interface inheritance to enforce composition at the class level

[Ben Piatt]

And because my classes are parcelable, I allow the writeToParcel method in each interface to call its super to add its own members to the parcel

[Ben Piatt]

That’s one use case

[Casey Kulm]

Interfaces can extend one another, but not inherit. There is nothing to inherit from an interface. Inheritance is an OOP concept, and interfaces are not Objects.

[Casey Kulm]

So there isn’t really anything to disagree with.

[Casey Kulm]

But to help address your problem, I try to lean towards the Decorator pattern https://en.wikipedia.org/wiki/Decorator_pattern

[Casey Kulm]

Rather than forcing a child class method to ask it’s parent method to do work, you pass in a “CommonFoo” class instance to a “SpecificFoo” classes constructor, and allow the “SpecificFoo” class to add additional info to that method

[Ben Piatt]

Thanks! I will take a deeper look into that