VehiclePolymorphism.kt

enum class VehicleType {
    TRUCK,
    PLANE;
}

// 1
sealed interface Vehicle {
    val type: VehicleType
}

// 2
@JsonClass(generateAdapter = true)
data class Truck (
    @Json(name = "waterCannon") val waterCannon: Boolean
): Vehicle {
    override val type = VehicleType.TRUCK
}

// 3
@JsonClass(generateAdapter = true)
data class Plane (
    @Json(name = "wingsSpanInMeters") val wingsSpanInMeters: Int
): Vehicle {
    override val type = VehicleType.PLANE
}