static void Main(string[] args)
{
var view = new ConsoleView();
var beverages = BeverageProvider.GetBeverages();
// create beverage
var beverage = beverages.Take(1).FirstOrDefault();
// add CondimentDecorators
// add Mocha
beverage = new Mocha(beverage)
{
Cost = .60M
};
beverage = new Mocha(beverage)
{
Cost = .60M
};
// add Soy
beverage = new Soy(beverage)
{
Cost = .40M
};
// add Whip
beverage = new Whip(beverage)
{
Cost = .45M
};
view.Show(beverage);
}
/// <summary>
/// # Motivation
/// I can now attach responsibilities to an object dynamically to add behaviour at runtime.
///
/// # Structure
/// Beverage
/// --> base class so all objects are of same type
/// CondimentDecorator : Bevarage
/// --> interchangeable with Beverage
///
/// # Sample Problem
/// A coffee shop wants to make an ordering system for all their drinks. Ofcourse there are a lot of combination with condiments/roasts.
/// We could create a base class and let all possible combinations inherit from the superclass and override their behaviour, but that would quickly become a mess.
///
/// # Solution
/// By creating a Decorator class which inherits from the baseclass (to effectively swap between types), I can now dynamically create composite objects at runtime.
/// To add a drink to the system:
/// 1. inherit from the base class, set instance fields in constructor
/// 2. override the 'Cost()' method to return desired cost
/// To add a condiment to the system:
/// 1. inherit from 'CondimentDecorator' (indirectly from base class as well
/// 2. add instance field from type Beverage
/// 3. initialize in constructor
/// 4. override GetDescription() and Cost() accordingly
/// To create a composite object at runtime:
/// 1. Create a new instance of a drink (Beverage)
/// 2. To add a condiment, assign the instance to a new instance of the condiment with itself as param
/// A. Beverage darkRoast = new DarkRoast();
/// B. darkRoast = new Mocha(darkRoast);
/// </summary>
public void Test()
{
Beverage beverage = new Espresso();
Console.WriteLine($"{beverage.GetDescription()} ${beverage.Cost()}");
Beverage beverage1 = new DarkRoast();
beverage1 = new Mocha(beverage1);
Console.WriteLine($"{beverage1.GetDescription()} ${beverage1.Cost()}");
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
Console.WriteLine($"{beverage2.GetDescription()} ${beverage2.Cost()}");
beverage2 = new Mocha(beverage2);
Console.WriteLine($"{beverage2.GetDescription()} ${beverage2.Cost()}");
beverage2 = new Whip(beverage2);
Console.WriteLine($"{beverage2.GetDescription()} ${beverage2.Cost()}");
Beverage beverage3 = new HouseBlend();
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine($"{beverage3.GetDescription()} ${beverage3.Cost()}");
}
public void DecoratorTest()
{
DIServiceLocator.Current.RegisterInstance(typeof(ITextProvider));
Support.Configure();
Beverage beverage = new Espresso();
beverage = new Mocha(beverage);
Assert.AreEqual(beverage.Description, "Espresso, Mocha");
Assert.AreEqual(beverage.Cost(), 2.19);
Beverage beverage2 = new DarkRoast();
beverage2 = beverage2.AddComponent <Mocha>();
beverage2 = beverage2.AddComponent <Mocha>();
beverage2 = beverage2.AddComponent <Whip>();
Assert.AreEqual(beverage2.Description, "Dark Roast, Mocha, Mocha, Whip");
Assert.AreEqual(beverage2.Cost(), 1.49);
Beverage beverage3 = new HouseBlend();
SupportExtensions.AddComponent <Soy>(ref beverage3);
SupportExtensions.AddComponent <Mocha>(ref beverage3);
SupportExtensions.AddComponent <Whip>(ref beverage3);
Assert.AreEqual(beverage3.Description, "House Blend Coffee, Soy, Mocha, Whip");
Assert.AreEqual(beverage3.Cost(), 1.34);
}
static void Main(string[] args)
{
Beverage beverage = new Expresso();
Console.WriteLine("Beverage #1: " + beverage.getDescription() + " $" + beverage.cost());
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine("\nBeverage #2: " + beverage2.getDescription() + " $" + beverage2.cost());
Beverage beverage3 = new HouseBlend();
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine("\nBeverage #3: " + beverage3.getDescription() + " $" + beverage3.cost());
//keep window open
Console.ReadLine();
}
static void Main(string[] args)
{
//LargePizza largePizza = new LargePizza();
Pizza largePizza = new LargePizza();
largePizza = new Cheese(largePizza);
largePizza = new Ham(largePizza);
largePizza = new Peppers(largePizza);
//Console.WriteLine(largePizza.Description);
Console.WriteLine(largePizza.GetDescription());
Console.WriteLine("{0:C2}", largePizza.CalculateCost());
Console.ReadKey();
Console.WriteLine();
Beverage coffee = new Espresso();
coffee = new Mocha(coffee);
coffee = new Mocha(coffee);
coffee = new Whip(coffee);
Console.WriteLine(coffee.GetDescription());
Console.WriteLine("{0:C2}", coffee.Cost());
Console.ReadKey();
}
static void Main(string[] args)
{
IBeverage beverage = new DarkRoast();
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Soy(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Whip(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Mocha(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Mocha(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Whip(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Whip(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Whip(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Whip(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Whip(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
beverage = new Whip(beverage);
System.Console.WriteLine($"{beverage.GetDescription()}: ${beverage.GetCost()}\n");
Console.ReadLine();
}
static void Main()
{
Beverage espresso = new Espresso();
Beverage mocha = new Mocha(espresso);
Console.WriteLine(mocha.Description); // Prints Espresso, Mocha
}
internal static void ExecuteDecorator()
{
//Intent
// • Attach additional responsibilities to an object dynamically.
// Decorators provide a flexible alternative to subclassing for extending
// functionality.
// • Client - specified embellishment of a core object by recursively
// wrapping it.
// • Wrapping a gift, putting it in a box, and wrapping the box.
//Problem
// You want to add behavior or state to individual objects at run-time.
// Inheritance is not feasible because it is static and applies to an entire
// class.
Beverage beverage = new Cream(new Cream(new Espresso()));
Beverage beverage2 = new Mocha(new Milk(new Americano()));
Console.WriteLine(String.Format($"Beverage: {beverage.GetName()}"));
Console.WriteLine(String.Format($"Cost: {beverage.GetCost()}"));
Console.WriteLine(String.Format($"Beverage: {beverage2.GetName()}"));
Console.WriteLine(String.Format($"Cost: {beverage2.GetCost()}"));
}
static void Main(string[] args)
{
Beverage beverage = new Expresso();
Console.WriteLine(beverage.GetDescription() + " R$" + beverage.Cost());
Console.WriteLine();
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine(beverage2.GetDescription() + " R$" + beverage2.Cost());
Console.WriteLine();
Beverage beverage3 = new HouseBlend();
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine(beverage3.GetDescription() + " R$" + beverage3.Cost());
Console.WriteLine();
Console.ReadKey();
}
static void Main(string[] args)
{
Beverage beverage1 = new Espresso();
Console.WriteLine(beverage1);
Beverage beverage1Small = new Espresso();
beverage1Small.SetSize(CupSize.Small);
Console.WriteLine(beverage1Small);
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine(beverage2);
Beverage beverage3 = new HouseBlend();
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine(beverage3);
Beverage beverage3Big = new HouseBlend(CupSize.Big);
beverage3Big = new Soy(beverage3Big);
beverage3Big = new Mocha(beverage3Big);
beverage3Big = new Whip(beverage3Big);
Console.WriteLine(beverage3Big);
}
public void CondimentDecorator_DecorateDescriptionIsValid()
{
IBeverage coffee = new SimpleCoffee();
ICondimentDecorator drink = new Mocha(coffee);
Assert.AreEqual("I am a mocha decorator", drink.DecoratorDescription);
}
public void CostIsComputedWithMocha()
{
DarkRoast darkRoast = new DarkRoast();
CondimentDecorator darkRoastWithMocha = new Mocha(darkRoast);
Assert.That(darkRoastWithMocha.Cost(), Is.EqualTo(2.5));
}
public void DarkRoastWithMochaWithWhipWithMilk()
{
Beverage beverage = new DarkRoast();
beverage = new Mocha(beverage);
beverage = new Whip(beverage);
beverage = new Milk(beverage);
Assert.AreEqual(1.39, beverage.Cost(),DELTA);
}
public void DescriptionWithMochaAndEspresso()
{
DarkRoast darkRoast = new DarkRoast();
CondimentDecorator darkRoastWithMocha = new Mocha(darkRoast);
CondimentDecorator darkRoastWithMochaAndMilk = new Milk(darkRoastWithMocha);
Assert.That(darkRoastWithMochaAndMilk.Description, Is.EqualTo("The Best Dark Roast, mocha, milk"));
}
public void CostIsComputedWithMochaAndEspresso()
{
DarkRoast darkRoast = new DarkRoast();
CondimentDecorator darkRoastWithMocha = new Mocha(darkRoast);
CondimentDecorator darkRoastWithMochaAndMilk = new Milk(darkRoastWithMocha);
Assert.That(darkRoastWithMochaAndMilk.Cost(), Is.EqualTo(3.25));
}
public void TestDecaf()
{
Beverage beverage = new Decaf();
beverage = new Mocha(beverage);
beverage = new Whip(beverage);
Assert.AreEqual("Decaf Coffee, Mocha, Whip $1.35", beverage.GetDescription() +
" $" + beverage.Cost());
}
public void DarkRoastWithMochaWithWhipWithMilk()
{
Beverage beverage = new DarkRoast();
beverage = new Mocha(beverage);
beverage = new Whip(beverage);
beverage = new Milk(beverage);
Assert.AreEqual(1.39, beverage.Cost(), DELTA);
}
public void HouseBlendWithSoyWithMochaWithWhip()
{
Beverage beverage = new HouseBlend();
beverage = new Soy(beverage);
beverage = new Mocha(beverage);
beverage = new Whip(beverage);
Assert.AreEqual(1.34, beverage.Cost(),DELTA);
}
public void TestDarkRoast()
{
Beverage beverage = new DarkRoast();
beverage = new Mocha(beverage);
beverage = new Soy(beverage);
Assert.AreEqual("Dark Roast Coffee, Mocha, Soy $1.34", beverage.GetDescription() +
" $" + beverage.Cost());
}
private void RunDecoratorPatternExample()
{
Beverage beverage = new Espresso();
beverage = new Whip(beverage).GetBeverage;
beverage = new Mocha(beverage).GetBeverage;
DisplayInfoAboutBeverageInListBox(beverage);
}
public void TestHouseBlend()
{
Beverage beverage = new HouseBlend();
beverage = new Mocha(beverage);
beverage = new SteamedMilk(beverage);
Assert.AreEqual("House Blend Coffee, Mocha, Steamed Milk $1.09", beverage.GetDescription() +
" $" + beverage.Cost());
}
public void DarkRoastMochaWithWhip()
{
IBeverage roast = new DarkRoast(BeverageSize.Large);
roast = new Mocha(roast);
roast = new Whip(roast);
Debug.WriteLine(roast.Description);
Debug.WriteLine("Cost: " + roast.Cost);
}
public void Main()
{
Beverage beverage = new Espresso();
Console.WriteLine(beverage.GetDescription() + " $" + beverage.Cost());
Beverage beverage1 = new DarkRoast();
beverage1 = new Mocha(beverage1);
}
static void TestDecorator()
{
IBeverage beverage = new Espresso();
beverage = new Mocha(beverage);
beverage = new Mocha(beverage);
beverage = new Whip(beverage);
Console.WriteLine($"Cost:{{{beverage.GetCost()}}}");
Console.WriteLine($"Order details: {beverage.GetName()}");
}
public void Cost_WithMocha_ReturnOneDollarAndNineteenCents()
{
Beverage darkRoastCoffee = new DarkRoast();
darkRoastCoffee = new Mocha(darkRoastCoffee);
var cost = darkRoastCoffee.Cost();
cost.Should().Be(1.19m);
}
public void Cost_WithMocha_ReturnTwoDollarAndNineteenCents()
{
Beverage espresso = new Espresso();
espresso = new Mocha(espresso);
var cost = espresso.Cost();
cost.Should().Be(2.19m);
}
public void Cost_WithMocha_ReturnOneDollarAndTwentyFiveCents()
{
Beverage decaf = new Decaf();
decaf = new Mocha(decaf);
var cost = decaf.Cost();
cost.Should().Be(1.25m);
}
public void HouseBlendWithSoyWithMochaWithWhip()
{
Beverage beverage = new HouseBlend();
beverage = new Soy(beverage);
beverage = new Mocha(beverage);
beverage = new Whip(beverage);
Assert.AreEqual(1.34, beverage.Cost(), DELTA);
}
public void ShowPattern()
{
Beverage beverage1 = new Espresso();
beverage1 = new Mocha(beverage1);
beverage1 = new Mocha(beverage1);
beverage1 = new Whip(beverage1);
var desc = beverage1.GetDescription();
var total = beverage1.Cost();
}
public static void Run()
{
Beverage beverage = new Espresso();
Console.WriteLine(beverage.description + " $" + beverage.cost());
Console.WriteLine();
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine(beverage2.description + " $" + beverage2.cost());
Console.WriteLine();
Beverage beverage3 = new HouseBlend();
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine(beverage3.description + " $" + beverage3.cost());
Console.WriteLine();
Beverage beverage4 = new HouseBlend();
beverage4.size = Beverage.Size.GRANDE;
Console.WriteLine("Setting size to: {0}", beverage4.size);
beverage4 = new Soy(beverage4);
beverage4 = new Mocha(beverage4);
beverage4 = new Whip(beverage4);
Console.WriteLine(beverage4.description + " $" + beverage4.cost());
Console.WriteLine();
Beverage beverage5 = new HouseBlend();
beverage5.size = Beverage.Size.TALL;
Console.WriteLine("Setting size to: {0}", beverage5.size);
beverage5 = new Soy(beverage5);
beverage5 = new Mocha(beverage5);
beverage5 = new Whip(beverage5);
Console.WriteLine(beverage5.description + " $" + beverage5.cost());
Console.WriteLine();
Beverage beverage6 = new HouseBlend();
beverage6.size = Beverage.Size.VENTI;
Console.WriteLine("Setting size to: {0}", beverage6.size);
beverage6 = new Soy(beverage6);
beverage6 = new Mocha(beverage6);
beverage6 = new Whip(beverage6);
Console.WriteLine(beverage6.description + " $" + beverage6.cost());
Console.WriteLine();
Console.ReadKey();
}
public void ShowPattern()
{
Beverage beverage1 = new Espresso();
beverage1 = new Mocha(beverage1);
beverage1 = new Mocha(beverage1);
beverage1 = new Whip(beverage1);
var desc = beverage1.GetDescription();
var total = beverage1.Cost();
}
public void TestExpressoWithSize()
{
BeverageSize beverageSize = BeverageSize.GRANDE;
Beverage beverage = new Expresso();
beverage.Size = beverageSize;
beverage = new Mocha(beverage);
beverage.Size = beverageSize;
Assert.AreEqual("Expresso, Mocha $1.9", beverage.GetDescription() +
" $" + beverage.Cost());
}
public void Test()
{
DarkRoast darkRoast = new DarkRoast();
Milk milk = new Milk(darkRoast);
Mocha mocha = new Mocha(milk);
Soy soy = new Soy(mocha);
Whip whip = new Whip(soy);
Assert.Equal("Dark Roast, Milk, Mocha, Soy, Whip",
whip.GetDescription());
}
protected void btn_Decorator_Click(object sender, EventArgs e)
{
EBeverageSize eSize = EBeverageSize.Venti;
Beverage beverage = null;
switch (rdol_Size.SelectedValue)
{
case "Venti":
eSize = EBeverageSize.Venti;
break;
case "Grande":
eSize = EBeverageSize.Grande;
break;
case "Tall":
eSize = EBeverageSize.Tall;
break;
}
switch (rdol_Beverage.SelectedValue)
{
case "HouseBlend":
beverage = new HouseBlend(eSize);
break;
case "Espresso":
beverage = new Espresso(eSize);
break;
}
var checkBoxSelect = from chkl in chkl_Decorator.Items.Cast<ListItem>() where chkl.Selected == true select chkl;
foreach (var chklItem in checkBoxSelect)
{
switch (chklItem.Value)
{
case "Mocha":
beverage = new Mocha(beverage);
break;
case "Whip":
beverage = new Whip(beverage);
break;
case "Milk":
beverage = new Milk(beverage);
break;
case "Soy":
beverage = new Soy(beverage);
break;
}
}
lbl_Decoraor.Text = beverage.getDescription();
lbl_Price.Text = beverage.cost().ToString ();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine("{0} ${1}", beverage.GetDescription(), beverage.Cost());
beverage.SetSize(3);
Console.WriteLine("{0} ${1}", beverage.GetDescription(), beverage.Cost());
Beverage beverage2 = new Mocha(beverage);
Console.WriteLine("{0} ${1}", beverage2.GetDescription(), beverage2.Cost());
beverage2 = new Mocha(beverage2);
Console.WriteLine("{0} ${1}", beverage2.GetDescription(), beverage2.Cost());
beverage2.SetSize(2);
Console.WriteLine("{0} ${1}", beverage2.GetDescription(), beverage2.Cost());
Console.ReadKey();
}
static void Main(string[] args)
{
Beverage beverage = new Expresso();
Console.WriteLine("Beverage #1: "+beverage.getDescription() + " $"+ beverage.cost());
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine("\nBeverage #2: " + beverage2.getDescription() + " $" + beverage2.cost());
Beverage beverage3 = new HouseBlend();
beverage3 = new Soy(beverage3);
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine("\nBeverage #3: " + beverage3.getDescription() + " $" + beverage3.cost());
//keep window open
Console.ReadLine();
}
public static void TestDecorate()
{
Console.WriteLine("\n\n\n--------------------测试装饰者模式--------------------");
//客人点了一杯espresso
Beverage espresso = new Espresso();
//客人点了一杯拿铁
Beverage natie = new NaTie();
espresso = new Milk(espresso);//添加牛奶
espresso = new Sugar(espresso);//添加糖
var desEspresso = espresso.getDescription();
var costEspresso = espresso.Cost();
Console.WriteLine("{0}共花费了{1}元", desEspresso, costEspresso);
natie = new Milk(natie);//加奶
natie = new Milk(natie);//加奶
natie = new Sugar(natie);//加糖
natie = new Mocha(natie);//加摩卡
var desNatie = natie.getDescription();
var costNatie = natie.Cost();
Console.WriteLine("{0}共花费了{1}元", desNatie, costNatie);
}
