If you have a function that return the Enum from t...

# kondor-json

[Uberto Barbini]

If you have a function that return the Enum from the label you can write a JTitleType converter:

object JTitleType : JStringRepresentable<TitleType>() {
    override val cons: (String) -> TitleType = ???
    override val render: (TitleType) -> String = TitleType::label
}

[Razvan]

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<TitleType>() {
    override val cons: (String) -> TitleType = ::fromLabel
    override val render: (TitleType) -> String = TitleType::label
}

object JTitleRequest : JAny<TitleRequest>() {
    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]

reg the nullable -> 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]

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<TitleType>() {
    override val cons: (String) -> TitleType = ::fromLabel
    override val render: (TitleType) -> String = TitleType::label
}

object JTitleRequest : JAny<TitleRequest>() {
    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]

this compiles to me, what's the problem?

[Razvan]

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]

expected:<"{
  "id": "tom",
  "type": "movie"
}"> but was:<"{
  "id": "tom",
  "type": "Movie"
}">