private static void TryAdapter2(KoreanWallOutlet outlet, AmericanPlug americanPlug)
{
var adapter2 = new RegulatedAdapter(americanPlug);
outlet.PlugIn(adapter2);
var powerApplied = outlet.ApplyPower();
if (powerApplied)
{
Console.WriteLine("Used regulated adapter Device turned on.");
}
}
private static void TryAdapter1(KoreanWallOutlet outlet, AmericanPlug americanPlug)
{
try
{
// the voltages don't match so this won't work either
var adapter1 = new UnregulatedAdapter(americanPlug);
outlet.PlugIn(adapter1);
outlet.ApplyPower(); // boom
}
catch (Exception ex)
{
Console.WriteLine($"Used unregulated adapter. {ex.Message}");
}
}
/********************* ADAPTER PATTERN ******************************
* In short, the adapter pattern is a way you can make one interface
* work with a different interface, without modifying either. This
* facilitates SRP, allowing you to work with various circumstances
* without contaminating your model.
*
* This example shows a scenario where you don't have the option to
* base class the outlet because you don't own the library in which
* it resides, simulating a scenario where you either don't have
* access to the library source, or when modifying the source would
* complicate or contaminate the original model.
********************************************************************/
private static void Main(string[] args)
{
var koreanOutlet = new KoreanWallOutlet();
TryKoreanPlug(koreanOutlet);
var americanPlug = new AmericanPlug();
// won't compile because wrong plug/doesn't fit the interface
//outlet.PlugIn(americanPlug);
//TryAdapter1(koreanOutlet, americanPlug);
//TryAdapter2(koreanOutlet, americanPlug);
Console.ReadKey();
}
public UnregulatedAdapter(AmericanPlug americanPlug)
{
_americanPlug = americanPlug;
}