I'd like to sort elements of collections by different properties on serialization, Is there some bui...

# serialization

[Sebastian Schuberth]

I'd like to sort elements of collections by different properties on serialization, Is there some built-in way / annotation argument I'm missing to do that, or would I have to implement e.g. a JsonTransformingSerializer that takes a Comparator?

[Sebastian Schuberth]

Basically, I'm looking for an equivalent of Jackon's StdConverter.

[Sebastian Schuberth]

Something like this does not seem to work, the set remains unsorted:

@Serializable(SetSortedSerializer::class)
        val licenses: Set<String>

with

object SetSortedSerializer : JsonTransformingSerializer<Set<String>>(SetSerializer(String.serializer())) {
    override fun transformSerialize(element: JsonElement): JsonElement {
        if (element is JsonArray) {
            return element.sortedBy { it.jsonPrimitive.content } as JsonArray
        }
        return element
    }
}

[Sebastian Schuberth]

Very weird, the problem seems to be something else, as my serializer does not seem to be called at all...

[Sebastian Schuberth]

Nevermind, I was still using the wrong object mapper 😾