class1.cs

来自DoFactory的设计模式, 由于是本人根据已有代码创建,没有NETOptimized项

// Abstract Factory pattern -- Real World example  

using System;

namespace DoFactory.GangOfFour.Abstract.RealWorld
{
    // MainApp test application 

    class MainApp
    {
        public static void Main()
        {
            // Create and run the Africa animal world 
            ContinentFactory africa = new AfricaFactory();
            AnimalWorld world = new AnimalWorld(africa);
            world.RunFoodChain();

            // Create and run the America animal world 
            ContinentFactory america = new AmericaFactory();
            world = new AnimalWorld(america);
            world.RunFoodChain();

            // Wait for user input 
            Console.Read();
        }
    }

    // "AbstractFactory" 

    abstract class ContinentFactory
    {
        public abstract Herbivore CreateHerbivore();
        public abstract Carnivore CreateCarnivore();
    }

    // "ConcreteFactory1" 

    class AfricaFactory : ContinentFactory
    {
        public override Herbivore CreateHerbivore()
        {
            return new Wildebeest();
        }
        public override Carnivore CreateCarnivore()
        {
            return new Lion();
        }
    }

    // "ConcreteFactory2" 

    class AmericaFactory : ContinentFactory
    {
        public override Herbivore CreateHerbivore()
        {
            return new Bison();
        }
        public override Carnivore CreateCarnivore()
        {
            return new Wolf();
        }
    }

    // "AbstractProductA" 

    abstract class Herbivore
    {
    }

    // "AbstractProductB" 

    abstract class Carnivore
    {
        public abstract void Eat(Herbivore h);
    }

    // "ProductA1" 

    class Wildebeest : Herbivore
    {
    }

    // "ProductB1" 

    class Lion : Carnivore
    {
        public override void Eat(Herbivore h)
        {
            // Eat Wildebeest 
            Console.WriteLine(this.GetType().Name +
              " eats " + h.GetType().Name);
        }
    }

    // "ProductA2" 

    class Bison : Herbivore
    {
    }

    // "ProductB2" 

    class Wolf : Carnivore
    {
        public override void Eat(Herbivore h)
        {
            // Eat Bison 
            Console.WriteLine(this.GetType().Name +
              " eats " + h.GetType().Name);
        }
    }

    // "Client" 

    class AnimalWorld
    {
        private Herbivore herbivore;
        private Carnivore carnivore;

        // Constructor 
        public AnimalWorld(ContinentFactory factory)
        {
            carnivore = factory.CreateCarnivore();
            herbivore = factory.CreateHerbivore();
        }

        public void RunFoodChain()
        {
            carnivore.Eat(herbivore);
        }
    }
}