Bridge to Kotlin Part 8

sealed_classes_5.kt

fun main(args: Array<String>) {
    val screenState = ScreenState.Data(SomeData(1, "Hello World"))
    setScreenState(screenState)
}

fun setScreenState(screenState: ScreenState) {
    when(screenState) {
        is ScreenState.Error -> println("Error")
        is ScreenState.Loading -> println("Loading")
        is ScreenState.Data -> {
            println(screenState.someData.name)
        }
    }
}

sealed class ScreenState {
    class Error: ScreenState()
    class Loading: ScreenState()
    data class Data(val someData: SomeData) : ScreenState()
}

data class SomeData(val id: Int, val name: String)