// The old way
private static void TypeCastingWithoutPatternMatching(Storage storage)
{
if (storage == null)
{
throw new ArgumentNullException();
}
if (storage is UsbKey)
{
UsbKey usbKey = (UsbKey)storage;
if (usbKey.IsPluggedIn)
{
usbKey.Unload();
Console.WriteLine("USB Drive Unloaded.");
}
else
{
throw new NotImplementedException();
}
}
else if (storage is Dvd)
{
}
else
{
throw new NotImplementedException();
}
}
// Pro účely Dema
// Jinak zde by rozhodně byla lepší abstraktní metoda Eject na Storage
public static void Eject_WithoutPatternMatching(Storage storage)
{
if (storage == null)
{
throw new ArgumentNullException();
}
if (storage is UsbKey)
{
UsbKey usbKey = (UsbKey)storage;
if (usbKey.IsPluggedIn)
{
usbKey.Unload();
Console.WriteLine("USB Drive Unloaded.");
}
}
else if (storage is DVD)
{
DVD dvd = (DVD)storage;
if (dvd.IsInserted)
{
// ...
}
}
}
