Kotlin - how to find an exact instance of a class-CodePudding

sealed class Mission(open val quests: List<Quest>) {
sealed class SubMission(override val quests: List<Quest>) : Mission(quests) {
    data class Mission1(override val quests: List<Quest>): SubMission(quests) 
    data class Mission2(override val quests: List<Quest>): SubMission(quests) 
    data class Mission3(override val quests: List<Quest>): SubMission(quests) 
} }

I have this structure in my code and a List<Mission>.

Then using a following function I would like the list to return an exact item that matches the class given in function.

private fun getMission(currentMissionClass: KClass<Mission>): Mission {}

So let's say I'm giving the function argument Mission.SubMission.Mission1() and I expect the function to return the item from List<Mission> that matches that exact class. Is there an easy and convenient way to do this in kotlin?

CodePudding user response：

filterIsInstance should work

private inline fun <reified T: Mission> getMission(
    list: List<Mission>, currentMissionClass: Class<T>): List<T> {
    return list.filterIsInstance<T>()
}


getMission(list, Mission1::class.java)