ViewModelBinder utility class for Kodein DI

ViewModelBinder.kt

inline fun <reified ViewModelT : ViewModel> BindActivity.viewModelBinder() = lazy {
    activitybBinder<ViewModelT>(bindActivity = this)
}

inline fun <reified ViewModelT : ViewModel> BindFragment.viewModelBinder() = lazy {
    ViewModelProviders
            .of(this,
                    getFactory<ViewModelT>(kodein))
            .get(ViewModelT::class.java)
}

inline fun <reified ViewModelT : ViewModel> BindFragment.viewModelActivityBinder() = lazy {
    val bindActivity = activity as BindActivity
    activitybBinder<ViewModelT>(bindActivity)
}

inline fun <reified ViewModelT : ViewModel> activitybBinder(bindActivity: BindActivity): ViewModelT {
    return ViewModelProviders
            .of(bindActivity,
                    getFactory<ViewModelT>(bindActivity.kodein))
            .get(ViewModelT::class.java)
}

inline fun <reified ViewModelT : ViewModel> getFactory(
        kodein: Kodein) =
        object : ViewModelProvider.Factory {
            override fun <T : ViewModel> create(modelClass: Class<T>): T {
                @Suppress("UNCHECKED_CAST")
                return Kodein {
                    extend(kodein)
                }.run {
                    val viewModel by instance<ViewModelT>()
                    viewModel
                } as T
            }
        }
        
//From any Activity extending from InjectedActivity
private val activityViewModel by viewModelBinder<MyActivityViewModel>()
override fun activityModule() = Kodein.Module(MyActivity.TAG) {
	bind() from provider { MyActivityViewModel(instance(), instance()) }
}

//From any fragment extending from InjectedFragment
private val fragmentViewModel by viewModelBinder<MyFragmentViewModel>()
override fun fragmentModule() = Kodein.Module(MyFragment.TAG) {
	bind() from provider { MyFragmentViewModel(instance()) }
}

//If you want to get activity ViewModel from the fragment
private val activityViewModel by viewModelActivityBinder<MyActivityViewModel>()