NotSoSimple.kt

fun toPet(values: List<String>): Try<Pet> {
    val name = values[0]
    val ageTry = Try { values[1].toInt() }
    val typeTry = PetType.lookup(values[2])

    return ageTry.flatMap { age -> typeTry.map { type -> Pet(name, age, type) } }
}

enum class PetType(val type: String) {

    Cat("Cat"),
    Dog("Dog"),
    Ferret("Ferret");

    companion object {
        val mapping = PetType.values().associateBy(PetType::type)
        fun lookup(type: String) = Try { mapping[type] ?: throw Exception("No Pet Type: $type") }
    }
}