RoleEnumJsonAdapter.kt

class RoleEnumJsonAdapter : JsonAdapter<Role>() {
    @FromJson
    override fun fromJson(reader: JsonReader): Role? {
        return if (reader.peek() != JsonReader.Token.NULL) {
            Role.fromValueOrNull(reader.nextInt())
        } else {
            reader.nextNull()
        }
    }

    @ToJson
    override fun toJson(writer: JsonWriter, value: Role?) {
        writer.value(value?.value)
    }
}