hello, is this a known issue? I have an interface ...

# kapt

[david.bilik]

hello, is this a known issue? I have an interface

interface AutoRefreshViewModel : LifecycleObserver {

    @OnLifecycleEvent(value = Lifecycle.Event.ON_START)
    fun startAutoRefresh()

    @OnLifecycleEvent(value = Lifecycle.Event.ON_STOP)
    fun stopAutoRefresh()
}

and then I have implementation of this interface

class AutoRefreshImplementation(val period: Long, val action: () -> Unit) : AutoRefreshViewModel {
    private var refreshDisposable: Disposable? = null

    override fun startAutoRefresh() {
        refreshDisposable?.safeDispose()
        refreshDisposable = Observable.interval(period, period, TimeUnit.MILLISECONDS)
                .subscribe {
                    action()
                }
    }

    override fun stopAutoRefresh() {
        refreshDisposable?.safeDispose()
    }
}

usage of it in class is simple,

class ControlViewModel @Inject constructor() : ViewModel(), AutoRefreshViewModel by AutoRefreshImplementation(period, {
// action 
}) {...}

everything works fine until I change something in this file ControlViewModel, then annotation processor throws an error

ControlViewModel.java:52: error: annotation @OnLifecycleEvent is missing a default value for the element 'value'
    @android.arch.lifecycle.OnLifecycleEvent()

and in the generated stub I can see both methods as

@java.lang.Override()
    @android.arch.lifecycle.OnLifecycleEvent()
    public void startAutoRefresh() {
    }
    
    @java.lang.Override()
    @android.arch.lifecycle.OnLifecycleEvent()
    public void stopAutoRefresh() {
    }

… if I rebuild my project, stub looks ok

@java.lang.Override()
    @android.arch.lifecycle.OnLifecycleEvent(value = android.arch.lifecycle.Lifecycle.Event.ON_START)
    public void startAutoRefresh() {
    }
    
    @java.lang.Override()
    @android.arch.lifecycle.OnLifecycleEvent(value = android.arch.lifecycle.Lifecycle.Event.ON_STOP)
    public void stopAutoRefresh() {
    }

workaround is to not use delegated implementation but use it myself, but its a real bummer