hi all - does hoplite support polymorphic types.. ...

# hoplite

[Peter]

hi all - does hoplite support polymorphic types.. sum type really? (in HOCON if it matters)

[Peter]

eg

sealed interface Lamp {
    object StandardLamp: Lamp
    data class SpecialLamp(val brightness: Int): Lamp
}

data class Config(
    val lamp: Lamp = Lamp.StandardLamp
)

[Peter]

i can do that with kotlinx.serialization.hocon (though must be a sealed class rather) .. it needs a type hint in the HOCON

[Peter]

oops, missed it the first time round: https://github.com/sksamuel/hoplite#sealed-classes

[sam]

Yep, sealed classes and interfaces

[sam]

You might run into some edge cases if the fields align

[Peter]

based on field types?

[sam]

sealed interface Foo {
    data class Bar1(val a: String): Foo
    data class Bar2(val a: String): Foo
}

[Peter]

👍

[Peter]

good to know

[sam]

Like that, super edge case-y but the system wouldn't know which to pick in that case

[Peter]

are you opposed to a type hint in the serialized format?

[sam]

Not opposed, if there's a use case for it

[Peter]

doesn’t look like it supports object s unfortunately 😞

[Peter]

ie 0 fields

[sam]

how would it do that, the absense of any values ?

[Peter]

maybe?

{
  lamp = { }
}

i haven’t looked at how it works internally

[sam]

That might work for json stuff yeah

[sam]

sounds like it would be fairly easy to do

[Peter]

😅

[sam]

1.4.16 is syncing to Maven now.

[sam]

https://github.com/sksamuel/hoplite#objects-in-sealed-classes

[Peter]

awesome, thank you!! 🙌

[sam]

Let me know if you have an issues

[Peter]

works great - thanks again! 🙏

[Jim]

Oh this is nice, I had to use a wrapper config class with the object as the default value