static void Main(string[] args)
{
ICarSupplier objCarSupplier = CarFactory.GetCarInstance(2);
objCarSupplier.GetCarModel();
Console.WriteLine("And Coloar is " + objCarSupplier.CarColor);
Console.ReadLine();
}
/// <summary>
/// Acts as the client in the Proxy Pattern
/// </summary>
private static void ProxyPattern()
{
Console.WriteLine("===== Proxy Pattern Example =====");
Console.WriteLine("Starting the car as a buyer.");
ICar boughtCar = CarFactory.GetCar(DriverType.Buyer); // Returns a proxy
boughtCar.Start(); // Car starts (passes security check in the proxy)
Console.WriteLine("Starting the car as a demo driver.");
ICar demoCar = CarFactory.GetCar(DriverType.Demo); // Returns a subject
demoCar.Start(); // Car starts (the subject does not have a security check)
Console.WriteLine("Starting the car as a theft.");
ICar stolenCar = CarFactory.GetCar(DriverType.Theft); // Returns a proxy
stolenCar.Start(); // Car does not start (fails security check in the proxy)
Console.WriteLine();
}
/// <summary>
/// Client
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
var superBuilder = new SuperCarBuilder();
var notSuperBuilder = new NotSoSuperCarBuilder();
var factory = new CarFactory();
var builders = new List <CarBuilder>
{
superBuilder, notSuperBuilder
};
foreach (var bld in builders)
{
var c = factory.Build(bld);
Console.WriteLine($"The car requested by {bld.GetType().Name}: " +
$"\n------------------" +
$"\n Horse power: {c.HorsePower}" +
$"\n Impressive feature: {c.MostImpressiveFeature}" +
$"\n Top Speed: {c.TopSpeedMPH} mph\n");
}
Console.ReadLine();
}
static void Main(string[] args)
{
#region Decorator - Using Composition to limit inheritance and simplify object relationships easier to maintain and manage.
//Inside ConcreteDecorator any number of features can be added to the car and price for the car can be updated.
Decorator.Component.Car sampleCar = new CompactCar();
sampleCar = new LeatherSeats(sampleCar);
Console.WriteLine(sampleCar.GetDescription());
Console.WriteLine($"{sampleCar.GetCarPrice():C2}");
#endregion
#region Observer - Change in one object causes a change or action in another.
var trump = new Trump("I love my wife");
var firstFan = new Fan("Rohit");
var secondFan = new Fan("Ram");
trump.AddFollower(firstFan);
trump.AddFollower(secondFan);
trump.Tweet = "I hate media";
#endregion
#region Builder Pattern- Separate and reuse a specific process to build an object /use when constructing a complex object
//Director- construct ()
//Builder - Build part
//CarBuilder to construct two types of cars
//override the method of building a car in separate classes which derive from an abstract carbuilder
//create a list of carbuilder objects to specify the current known types of cars that can be built
//create a factory
var superBuilder = new SuperCarBuilder();
var notSoSsuperBuilder = new NotSoSuperCarBuilder();
var factory = new CarFactory();
var builders = new List <CarBuilder> {
superBuilder, notSoSsuperBuilder
};
foreach (var b in builders)
{
var c = factory.Build(b);
Console.WriteLine($"The car requested by " + $"{b.GetType().Name}:" + Environment.NewLine
+ $"Horse Power: {c.HorsePower}" + Environment.NewLine
+ $"Impressive feature: {c.MostImpressiveFeature}" + Environment.NewLine
+ $"Top speed: {c.TopSpeedMPH} mph" + Environment.NewLine);
}
#endregion
#region Bridge Pattern- Used to separate an abstraction from its implementation so both can be modified independently
//Sending messages from sms or service without each affecting the other
IMessageSender text = new TextSender();
IMessageSender web = new WebServiceSender();
Message message = new SystemMessage(text);
message.Subject = "A message";
message.Body = "hi there, please know this";
message.MessageSender = text;
message.Send();
message.MessageSender = web;
message.Send();
#endregion
#region Chain of responsibility- Chain the receiving objects and pass the request along the chain until an object handles it.
//Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request
Approver Bobby = new Director();
Approver Sunny = new VicePresident();
Approver Dharam = new President();
Bobby.SetSuccessor(Sunny);
Sunny.SetSuccessor(Dharam);
Purchase P = new Purchase()
{
Amount = 10000, Number = 1
};
Bobby.ProcessRequest(P);
#endregion
#region Command - Wrap request as an object to be implemented later or invoke at different points in time.
//Encapsulate a request as an object, thereby letting you parameterize clients with different requests -queue or log and support undoable operations
//Use an object to store required information to perform an action at any point in time.
var user = new User();
user.Compute('+', 100);
user.Compute('-', 50);
user.Compute('*', 10);
user.Compute('/', 2);
//undo
user.Undo(4);
//Redo
user.Redo(3);
#endregion
Console.ReadLine();
}
static void Main(string[] args)
{
#region Creational Patterns
//Singleton
Singleton singleton = Singleton.GetInstance();
singleton.someUsefulCode();
Separate();
//Builder
Item ciastko = new ItemBuilder(0).SetName("Ciastko").SetType("Food").build();
Console.WriteLine($"{ciastko.id}. {ciastko.name}, {ciastko.type}");
Separate();
//Prototype
Person person = new Person(1, 15, "John");
Person shallowCopy = (Person)person.ShallowCopy();
Person deepCopy = (Person)person.DeepCopy();
Console.WriteLine(person);
Console.WriteLine(shallowCopy);
Console.WriteLine(deepCopy);
person.name = "Max";
person.age = 20;
person.id = new IdInfo(99);
Console.WriteLine(person);
Console.WriteLine(shallowCopy);
Console.WriteLine(deepCopy);
Separate();
//AbstractFactory
Car miniCar = CarFactory.CarBuilder(CarType.MINI);
Car lumiCar = CarFactory.CarBuilder(CarType.LUXURY);
Separate();
//FactoryPattern
ShapeFactory shapeFactory = new ShapeFactory();
Shape circle = shapeFactory.GetShape("circle");
circle.print();
Separate();
//ObjectPool
SomeObject so1 = Pool.GetObject();
SomeObject so2 = Pool.GetObject();
Pool.ReleaseObject(so1);
SomeObject so3 = Pool.GetObject();
Console.WriteLine($"so1: {so1}");
Console.WriteLine($"so2: {so2}");
Console.WriteLine($"so3: {so3}");
Separate();
#endregion
#region Structural Patterns
//Adapter
OldClass oldClass = new OldClass();
IWrite write = new Adapter(oldClass);
write.PrintMessage();
Separate();
//Bridge
Thing triangle = new Ball(new Blue());
triangle.print();
Separate();
//Composite
Component leaf1 = new Leaf("leaf1");
Component leaf2 = new Leaf("leaf2");
Component leaf3 = new Leaf("leaf3");
Component branch1 = new Composite("branch1");
branch1.Add(leaf1);
branch1.Add(leaf2);
Component root = new Composite("root");
root.Add(branch1);
root.Add(leaf3);
root.Display(1);
Separate();
//Decorator
Weapon weapon = new BaseWeapon();
weapon.shot();
Weapon modifiedWeapon = new Stock(weapon);
modifiedWeapon.shot();
Separate();
//Facade
Student student = new Student();
student.StartLearning();
student.EndLearning();
Separate();
//Flyweight
Particle p1 = ParticleFactory.getSmallParticle("red"); //new key
Particle p2 = ParticleFactory.getSmallParticle("red"); //no new one
Particle p3 = ParticleFactory.getSmallParticle("blue"); //new key
Separate();
//Proxy
IBank proxyBank = new ProxyBank();
proxyBank.Pay();
Separate();
#endregion
#region Behavioral Patterns
//ChainOfResponsibility
Chain chain = new Chain();
chain.Process(5);
Separate();
//Command
var modifyPrice = new ModifyPrice();
var product = new Product("Brick", 200);
Console.WriteLine(product);
modifyPrice.SetCommandAndInvoke(new ProductCommand(product, PriceAction.Increase, 50));
Console.WriteLine(product);
Separate();
//Iterator
CarRepository carRepository = new CarRepository(new string[] { "Renault", "BMW", "VW" });
for (IIterator i = carRepository.GetIterator(); i.hasNext();)
{
Console.WriteLine($"Car: {i.next()}");
}
Separate();
//Mediator
Mediator mediator = new RealMediator();
APerson jhon = new RealPerson(mediator, "Jhon");
APerson max = new RealPerson(mediator, "Max");
APerson emma = new RealPerson(mediator, "Emma");
mediator.AddPerson(jhon);
mediator.AddPerson(max);
mediator.AddPerson(emma);
jhon.Send("I'm a jhon and this is my message! ");
emma.Send("henlo");
Separate();
//Memento
Localization localization = new Localization("NY", 123, 111);
LocalizationSnapshot snapshot = localization.CreateSnapshot();
Console.WriteLine(localization);
localization.City = "Berlin";
localization.X = 999;
Console.WriteLine(localization);
snapshot.Restore();
Console.WriteLine(localization);
Separate();
//Observer
Customer james = new Customer("James");
Customer william = new Customer("William");
Customer evelyn = new Customer("Evelyn");
Shop grocery = new Shop("YourFood");
Shop DIYshop = new Shop("Tooler");
grocery.AddSubscriber(james);
grocery.AddSubscriber(william);
grocery.AddSubscriber(evelyn);
DIYshop.AddSubscriber(james);
DIYshop.AddSubscriber(william);
grocery.AddMerchandise(new Merchandise("pizza", 19));
DIYshop.AddMerchandise(new Merchandise("hammer", 399));
Separate();
//State
AudioPlayer ap = new AudioPlayer();
ap.ClickPlay();
ap.ClickLock();
ap.ClickPlay();
ap.ClickPlay();
ap.ClickPlay();
ap.ClickLock();
ap.NextSong();
ap.PreviousSong();
Separate();
//Strategy
Calculator calculator = new Calculator(new AddingStrategy());
calculator.Calculate(5, 2);
calculator.ChangeStrategy(new SubtractingStrategy());
calculator.Calculate(5, 2);
Separate();
//TemplateMethod
Algorithm a1 = new AlgorithmWithStep2();
a1.Execute();
Algorithm a2 = new AlgorithmWithStep2and3();
a2.Execute();
Separate();
//Visitor
ElementA ea = new ElementA("ElementA");
ElementA eb = new ElementA("ElementB");
Visitor1 v1 = new Visitor1();
Visitor2 v2 = new Visitor2();
ea.Accept(v1);
ea.Accept(v2);
eb.Accept(v1);
eb.Accept(v2);
#endregion
}
