Avoiding race conditions in Kotlin, Smartcast is impossible runtime exception

The line:

viewAdapter.setTitleData(bezinningModels)

in the below snippet is giving me the runtime warning:

Smart cast to 'BezinningAdapter' is impossible, because 'viewAdapter'
is a mutable property that could have been changed by this time

I went through a lot of posts with a similar runtime warning, and I understood why this happens. Basically Kotlin wants to avoid race conditions so that the value of a mutable object could not change,but still I do not get what I should do to avoid this mistake so that I can call the retrofit call into the RecyclerView Array
I tried to change from var to val the value of RecyclerView but did not work

RecyclerView Array

var

val

RecyclerView

Here the snippet that causes the problem:

@RequiresApi(Build.VERSION_CODES.HONEYCOMB)
class MainFragment : android.app.Fragment()




private lateinit var viewManager: RecyclerView.LayoutManager
private lateinit var recyclerView: RecyclerView

private lateinit var viewAdapter: RecyclerView.Adapter<*>

override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View?

val view = inflater!!.inflate(R.layout.bezinning_fragment, container, false)

viewManager=LinearLayoutManager(activity)
viewAdapter=BezinningAdapter()

recyclerView = view.findViewById(R.id.recycler_view) as RecyclerView
recyclerView.setHasFixedSize(true)
recyclerView.layoutManager=viewManager
recyclerView.adapter=viewAdapter


val subscribe = bezinningListViewModel!!.showBezinningLijst("132")
?.subscribeOn(schedulerProvider!!.io())
?.observeOn(schedulerProvider!!.ui())
?.subscribe(object : FlowableSubscriber<List<BezinningModel>>
override fun onError(t: Throwable?)
Log.d("IVO", "onError: ")


override fun onComplete()
Log.d("IVO", "onComplete: ")


override fun onSubscribe(s: Subscription)
s.request(Long.MAX_VALUE);



override fun onNext(bezinningModels: List<BezinningModel>?)


val JSONResponseBody = bezinningModels!!
[0].attribute.body
viewAdapter.setTitleData(bezinningModels)


val bodyBezinningParsedHtml =
Html.fromHtml(JSONResponseBody)






)

return view








val viewAdapter = BezziningAdapter(); viewAdapter.whatever(); /*...*/ this.viewAdapter = viewAdapter

val

1 Answer
1

If you know that viewAdapter is going to be a BezinningAdapter, then declare it as such:

viewAdapter

BezinningAdapter

private lateinit var viewAdapter: BezinningAdapter<*>


private lateinit var viewAdapter: BezinningAdapter

viewAdapter

RecyclerView.Adapter

BezinningAdapter

var

RecyclerView.Adapter

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