Is it possible to write a helper method in kotlin so that java code can create a `KType`?

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[bbaldino]

Is it possible to write a helper method in kotlin so that java code can create a KType?

[diesieben07]

Depends on what your input is. Is it a java.lang.reflect.Type? A java.lang.Class?

[bbaldino]

Ideally java.lang.Class I think

[diesieben07]

You can write a method in Kotlin that accepts a Class. Turn it into a KClass using cls.kotlin and then into a KType using createType or starProjectedType depending on your needs

[bbaldino]

I saw createType, but was worried about whether or not I'd be able to infer the correct arguments (i.e. be able to properly differentiate List<Int> from List<Double>)

[diesieben07]

There is nothing to infer, java.lang.Class does not represent this information. The Class for List<Int> and List<Double> is the same, both are just List

[bbaldino]

KClass does I think, right?

[diesieben07]

No, KClass does not either. Only KType does, that's why it exists

[bbaldino]

I had played previously with a kotlin helper which java could call to get a KClass, and was able to differentiate things like List<Int> and List<Double> I thought (I'll have to double check)

[diesieben07]

Not using KClass or Class, you need KType or java.lang.reflect.Type for that.

[bbaldino]

Hm, ok

[bbaldino]

Ah, I see...it was an old experiment I was trying but you're right, I don't think it worked.

[bbaldino]

Bummer...Ok, thanks @diesieben07 I'll look into doing it with java.lang.reflect.Type