/*
* The Decorator Pattern
*
* attached additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.
*
* Example:
* Coffe Shop
* 3 types of coffee with price: Espresso $2.5, Mocha $3, Capuccino $3, etc.
* Each of which can have extras/condiments: Soy $1, Whip $0.5, Double $1.5, Decaf $1, etc.
*
* Problem:
* 1. Class Chaos: Abstract Beverage class -> Coffee subclasses, override cost() -> more sub-classes for options
* 2. Boolean properties on Beverage class -> Set options on each coffee instance -> calculate cost in the instance. Inflexible design, price change is problematic.
*
* Calsses should be open for extension but closed for modification. [Open-Closed Principle] (Design Principle #5)
* Easily augment what we have.
*
* Solution:
* Every new extra will encapsulate already existing i.e. new Double(new Whip(new Mocha())) so that every new option has its cost() method.
*
*/
static void Main(string[] args)
{
//plain Espresso
Beverage beverage = new Espresso();
Console.WriteLine($"{beverage.GetDescription()} ${beverage.Cost()}");
//Fancy Flat White
Beverage beverage1 = new FlatWhite();
beverage1 = new SoyMilk(beverage1);
beverage1 = new Syrup(beverage1);
Console.WriteLine($"{beverage1.GetDescription()} ${beverage1.Cost()}");
//Iced Espresso
Beverage beverage2 = new Espresso();
beverage2 = new Ice(beverage2);
Console.WriteLine($"{beverage2.GetDescription()} ${beverage2.Cost()}");
//Capuccino with everything
Beverage cap = new Capuccino();
cap = new SoyMilk(cap);
cap = new Syrup(cap);
cap = new Ice(cap);
Console.WriteLine($"{cap.GetDescription()} ${cap.Cost()}");
Console.ReadLine();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine($"{beverage.GetDescription()} {beverage.Cost()}");
Beverage beverage2 = new HouseBlend();
Console.WriteLine($"{beverage2.GetDescription()} {beverage2.Cost()}");
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine($"{beverage2.GetDescription()} {beverage2.Cost()}");
Beverage beverage3 = new HouseBlend();
Console.WriteLine($"{beverage3.GetDescription()} {beverage3.Cost()}");
beverage3 = new Mocha(beverage3);
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine($"{beverage3.GetDescription()} {beverage3.Cost()}");
Console.ReadLine();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso(Size.Grande);
Console.WriteLine($"{beverage.GetDescription()} ${beverage.Cost()}");
Beverage beverage2 = new DarkRoast(Size.Venti);
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
beverage2 = new SteamedMilk(beverage2);
Console.WriteLine($"{beverage2.GetDescription()} ${beverage2.Cost()}");
Beverage beverage3 = new HouseBlend(Size.Tall);
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine($"{beverage3.GetDescription()} ${beverage3.Cost()}");
Beverage beverage4 = new HouseBlend(Size.Grande);
beverage4 = new Soy(beverage4);
beverage4 = new Mocha(beverage4);
beverage4 = new Mocha(beverage4);
beverage4 = new Whip(beverage4);
Console.WriteLine($"{beverage4.GetDescription()} ${beverage4.Cost()}");
Console.ReadLine();
}
static void Main(string[] args)
{
IDrink espresso = new Espresso(new Chocolate(new Milk()));
Console.WriteLine(espresso.GetDescription());
Console.WriteLine(espresso.GetCost());
}
static void Main(string[] args)
{
var espresso = new Espresso();
Console.WriteLine(espresso.GetDescription() + " - $" + espresso.GetCost());
var espressoWithMilk = new Milk(new Espresso());
Console.WriteLine(espressoWithMilk.GetDescription() + " - $" + espressoWithMilk.GetCost());
Console.ReadKey();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine(beverage.GetDescription() + "$" + beverage.cost().ToString());
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2); //用两个Mocha修饰
beverage2 = new Whip(beverage2); //在用Whip修饰。
Console.WriteLine(beverage2.GetDescription() + "$" + beverage2.cost().ToString());
Console.ReadKey();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine(beverage.GetDescription() + "$" + beverage.Cost());
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocah(beverage2);
beverage2 = new Mocah(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine(beverage2.GetDescription() + "$" + beverage2.Cost());
Console.ReadLine();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine(beverage.GetDescription() + " $" + beverage.Cost());
Beverage beverage2 = new Whip(new Mocha(new Mocha(new DarkRoast())));
Console.WriteLine(beverage2.GetDescription() + " $" + beverage2.Cost());
Beverage beverage3 = new Whip(new Mocha(new Soy(new HouseBlend())));
Console.WriteLine(beverage3.GetDescription() + " $" + beverage3.Cost());
Console.ReadKey();
}
static void Main(string[] args)
{
var espresso = new Espresso();
Console.WriteLine(espresso.GetDescription());
Console.WriteLine(espresso.Cost());
var espressoWithChoc = new HotChocolate(espresso);
Console.WriteLine(espressoWithChoc.GetDescription());
Console.WriteLine(espressoWithChoc.Cost());
var espressoWithChockAndDoubleSyrop =
new MapleSyrup(new MapleSyrup(espressoWithChoc));
Console.WriteLine(espressoWithChockAndDoubleSyrop.GetDescription());
Console.WriteLine(espressoWithChockAndDoubleSyrop.Cost());
}
public static void MakeSomeCoffee()
{
Beverage beverage = new Espresso();
Console.WriteLine($"{beverage.GetDescription()} ${beverage.Cost()}");
Beverage darkRoast = new DarkRoast();
darkRoast = new Mocha(darkRoast);
darkRoast = new Mocha(darkRoast);
darkRoast = new Whip(darkRoast);
Console.WriteLine($"{darkRoast.GetDescription()} ${darkRoast.Cost()}");
Beverage houseBlend = new HouseBlend();
houseBlend.SetSize(Size.VENTI);
houseBlend = new Soy(houseBlend);
houseBlend = new Mocha(houseBlend);
houseBlend = new Whip(houseBlend);
Console.WriteLine($"{houseBlend.GetDescription()} ${houseBlend.Cost()}");
}
static void Main(string[] args)
{
BeverageBase espresso = new Espresso();
Console.WriteLine($"{espresso.GetDescription()} ${espresso.Cost()}");
BeverageBase houseBlend = new HouseBlend();
houseBlend = new Mocha(houseBlend);
houseBlend = new Mocha(houseBlend);
houseBlend = new WhipCream(houseBlend);
Console.WriteLine($"{houseBlend.GetDescription()} ${houseBlend.Cost()}");
BeverageBase darkRoast = new DarkRoast();
darkRoast = new SoyMilk(darkRoast);
darkRoast = new Mocha(darkRoast);
darkRoast = new WhipCream(darkRoast);
Console.WriteLine($"{darkRoast.GetDescription()} ${darkRoast.Cost()}");
Console.ReadLine();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine("Description: {0} \r\n Coast: {1}", beverage.GetDescription(), beverage.Coast());
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine("Description: {0} \r\n Coast: {1}", beverage2.GetDescription(), beverage2.Coast());
Beverage beverage3 = new HouseBlend();
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine("Description: {0} \r\n Coast: {1}", beverage3.GetDescription(), beverage3.Coast());
Console.ReadKey();
}
static void Main(string[] args)
{
Beverage beverage1 = new Espresso();
Console.WriteLine("{0} costs {1}$", beverage1.GetDescription(), beverage1.cost());
Beverage beverage2 = new DarkRoast();
beverage2 = new Milk(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
beverage2.GetDescription();
Console.WriteLine("{0} costs {1}$", beverage2.GetDescription(), beverage2.cost());
Beverage beverage3 = new Decaf();
beverage3.setSize(Beverage.Size.Venti);
beverage3 = new Soy(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine("{0} costs {1}$", beverage3.GetDescription(), beverage3.cost());
Console.ReadLine();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine(beverage.GetDescription() + " $ " + beverage.Cost());
beverage = new Mocha(beverage);
Console.WriteLine(beverage.GetDescription() + " $ " + beverage.Cost());
beverage = new Mocha(beverage);
Console.WriteLine(beverage.GetDescription() + " $ " + beverage.Cost());
beverage = new Whip(beverage);
Console.WriteLine(beverage.GetDescription() + " $ " + beverage.Cost());
beverage.size = Size.Larger;
Console.WriteLine(beverage.GetDescription() + " $ " + beverage.Cost());
beverage.size = Size.Middle;
Console.WriteLine(beverage.GetDescription() + " $ " + beverage.Cost());
beverage.size = Size.Small;
Console.WriteLine(beverage.GetDescription() + " $ " + beverage.Cost());
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine(beverage.GetDescription() + "$" + beverage.cost().ToString());
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);//用两个Mocha修饰
beverage2 = new Whip(beverage2);//在用Whip修饰。
Console.WriteLine(beverage2.GetDescription() + "$" + beverage2.cost().ToString());
Console.ReadKey();
}
