ViewModelFactory for Dagger2

ViewModelFactory.kt

/**
 * Constructs a ViewModelFactory with dependencies
 */
@Singleton
class ViewModelFactory @Inject constructor(
    private val creators: Map<Class<out ViewModel>, @JvmSuppressWildcards Provider<ViewModel>>
) : ViewModelProvider.Factory {

    override fun <T : ViewModel> create(modelClass: Class<T>): T {
        var creator = creators[modelClass]
        if (creator == null) {
            creator = creators.entries.firstOrNull {
                return@firstOrNull modelClass.isAssignableFrom(it.key)
            }?.value

            if (creator == null) {
                throw IllegalArgumentException("Unknown model class $modelClass, have you declared this class in ViewModelModule?")
            }
        }

        try {
            @Suppress("UNCHECKED_CAST")
            return creator.get() as T
        } catch (e: Exception) {
            throw RuntimeException(e)
        }
    }
}