Hey folks, is it possible to make a custom (de-) serializer (`KSerializer`) configurable? Specifical...

# serialization

[joschi]

Hey folks, is it possible to make a custom (de-) serializer (KSerializer) configurable?
Specifically I'm looking for a way to make a serializer for BigDecimal configurable regarding the scale of the BigDecimal.

Contextual serialization doesn't seem to be a fit because it would only work per class and not per field, right?

[joschi]

A "naive" serializer such as the one described in https://woohuiren.me/blog/custom-kotlin-serializer-for-bigdecimal/ doesn't work because the scale is fixed (default).

[joschi]

Is something like this the best we can do?

abstract class ScalableBigDecimalSerializer(private val scale: Int): KSerializer<BigDecimal> { ... }

object Scale2BigDecimalSerializer: ScalableBigDecimalSerializer(2)

[y9san9]

Personally I use such a variant bcz I really haven't a lot of serializers (just to of them), but you can try to go with this: https://kotlinlang.org/api/kotlinx.serialization/kotlinx-serialization-core/kotlinx.serialization/-serial-info/

[joschi]

Thanks, Alex. I'll look into it. 🙂