If you have a function that return the Enum from the label y

Question

If you have a function that return the Enum from the label you can write a JTitleType converter ```object JTitleType JStringRepresentable lt TitleType gt override val cons String gt TitleType = override val render TitleType gt String = TitleType label ```

Razvan · Answer

Yes I have the function ```enum class TitleType val label String Movie movie Series series Episoode episode companion object fun fromLabel label String = values firstOrNull it label == label ``` but returns a null able type and JStringRepresetable requires an Any well i could make it throw instead although I would prefer null but that does not fix everything still can see to write the `JTitleRequest` `type` to use it That would be somethig like ```data class TitleRequest val id String val type TitleType enum class TitleType val label String Movie movie Series series Episoode episode companion object fun fromLabel label String = values first it label == label object JTitleType JStringRepresentable lt TitleType gt override val cons String gt TitleType = fromLabel override val render TitleType gt String = TitleType label object JTitleRequest JAny lt TitleRequest gt private val id by str TitleRequest id private val type by str override fun JsonNodeObject deserializeOrThrow TitleRequest = TitleRequest id = +id type = TitleType fromLabel +type ```

Uberto Barbini · Answer

reg the nullable gt so in case of an unknown label you do want a null There is no support for that but I can think about it

Uberto Barbini · Answer

```data class TitleRequest val id String val type TitleType enum class TitleType val label String Movie movie Series series Episoode episode companion object fun fromLabel label String = values first it label == label object JTitleType JStringRepresentable lt TitleType gt override val cons String gt TitleType = fromLabel override val render TitleType gt String = TitleType label object JTitleRequest JAny lt TitleRequest gt private val id by str TitleRequest id private val type by str TitleRequest type override fun JsonNodeObject deserializeOrThrow TitleRequest = TitleRequest id = +id type = +type ```

Uberto Barbini · Answer

this compiles to me what s the problem

Razvan · Answer

Thanks but yet ```private val type by str TitleRequest type ``` doesn t do the job ``` Test fun aTest val inValue = TitleRequest tom TitleType Movie val json = JTitleRequest toPrettyJson inValue json shouldBe id tom type movie trimIndent ``` fails as it encodes the Enum name `Movies` instead the label `movie`

Razvan · Answer

```expected lt id tom type movie gt but was lt id tom type Movie gt ```

Razvan · Answer

Managed to make it work using ```private val type by obj JTitleType TitleRequest type ``` and a few tricks ```data class TitleRequest val id String val type TitleType enum class TitleType val label String Movie movie Series series Episoode episode companion object fun fromLabel label String = values first it label == label object JTitleType JStringRepresentable lt TitleType gt override val cons String gt TitleType = fromLabel override val render TitleType gt String = TitleType label object JTitleRequest JAny lt TitleRequest gt private val id by str TitleRequest id private val type by obj JTitleType TitleRequest type override fun JsonNodeObject deserializeOrThrow TitleRequest = TitleRequest id = +id type = type getter this recover null class KondorTest Test fun `type not null` val inValue = TitleRequest tom TitleType Movie val json = JTitleRequest toPrettyJson inValue also println it json shouldBe id tom type movie trimIndent Test fun `type is null` val inValue = TitleRequest tom null val json = JTitleRequest toPrettyJson inValue also println it json shouldBe id tom trimIndent Test fun `type is set to null when type is unknown` val inValue = id tom type unknown trimIndent val title = JTitleRequest fromJson inValue orThrow title shouldBe TitleRequest tom null ```