Hi, Is there a way to know the instance class of a...

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[Pablo Schmid]

Hi, Is there a way to know the instance class of a class property dynamically?
For example I have a data class MyClass(val person: Person). When MyClass is instantiated, it's built with a PersonImpl as the Person is the interface. val result = MyClass(PersonImpl())
I need to dynamically know that the person attribute is a PersonImpl.
I have been trying with `result::class.declaredMemberProperties`but I can't get the PersonImpl from it.
Thanks

[Ben Woodworth]

How about result.person is PersonImpl, or using result.person::class?

[Pablo Schmid]

That may work but I want to make it generic. I want to get the instance class the properties of a bunch of different classes

[Ben Woodworth]

Oh gotcha. This seems to work:

fun Any.hasPersonImplPropertyValue(): Boolean =
    this::class.declaredMemberProperties.any { property ->
        (property as KProperty1<Any, *>).get(this) is PersonImpl
    }

result.hasPersonImplPropertyValue() // true

(I'm not sure how to get around the hacky-feeling as KProperty1<Any, *> cast so there might be a better way)

[Pablo Schmid]

It worked! Thank you very much