CSharp: Abstract Factory in donet core 3

 

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/// <summary>    /// Abstract Factory抽像工厂    /// geovindu,Geovin Du  eidt    /// </summary>    public interface IShape    {        void Draw();    }    /// <summary>    ///    /// </summary>    public class Square : IShape    {        public void Draw() => Console.WriteLine("Basic square");    }    /// <summary>    ///    /// </summary>    public class Rectangle : IShape    {        public void Draw() => Console.WriteLine("Basic rectangle");    }    /// <summary>    ///    /// </summary>    public class RoundedSquare : IShape    {        public void Draw() => Console.WriteLine("Rounded square");    }    /// <summary>    ///    /// </summary>    public class RoundedRectangle : IShape    {        public void Draw() => Console.WriteLine("Rounded rectangle");    }    /// <summary>    ///    /// </summary>    public enum Shape    {        Square,        Rectangle    }    /// <summary>    ///    /// </summary>    public abstract class ShapeFactory    {        public abstract IShape Create(Shape shape);    }    /// <summary>    ///    /// </summary>    public class BasicShapeFactory : ShapeFactory    {        public override IShape Create(Shape shape)        {            switch (shape)            {                case Shape.Square:                    return new Square();                case Shape.Rectangle:                    return new Rectangle();                default:                    throw new ArgumentOutOfRangeException(                      nameof(shape), shape, null);            }        }    }    /// <summary>    ///    /// </summary>    public class RoundedShapeFactory : ShapeFactory    {        public override IShape Create(Shape shape)        {            switch (shape)            {                case Shape.Square:                    return new RoundedSquare();                case Shape.Rectangle:                    return new RoundedRectangle();                default:                    throw new ArgumentOutOfRangeException(nameof(shape), shape, null);            }        }    }    /// <summary>    ///    /// </summary>    public class Demo    {        public static ShapeFactory GetFactory(bool rounded)        {            if (rounded)                return new RoundedShapeFactory();            else                return new BasicShapeFactory();        }      }

　　

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/// <summary>   /// Abstract Factory抽像工厂   /// geovindu,Geovin Du  eidt   /// </summary>   public interface IAnimalFactory   {       IDog GetDog();       ITiger GetTiger();   }     /// <summary>   /// Abstract Product-1   /// </summary>   public interface ITiger   {       void AboutMe();   }   /// <summary>   /// Abstract Product-2   /// </summary>   public interface IDog   {       void AboutMe();   }     /// <summary>   /// Concrete product-A1(WildTiger)   /// </summary>   class WildTiger : ITiger   {       public void AboutMe()       {           Console.WriteLine("涂氏 tiger says: I prefer hunting in jungles.Halum.");       }   }   /// <summary>   ///  Concrete product-B1(WildDog)   /// </summary>   class WildDog : IDog   {       public void AboutMe()       {           Console.WriteLine("涂氏 dog says: I prefer to roam freely in jungles.Bow-Wow.");       }   }     /// <summary>   /// Concrete product-A2(PetTiger)   /// </summary>   class PetTiger : ITiger   {         /// <summary>       ///       /// </summary>       public void AboutMe()       {           Console.WriteLine("李氏 tiger says: Halum.I play in an animal circus.");       }   }     /// <summary>   /// Concrete product-B2(PetDog)   /// </summary>   class PetDog : IDog   {       public void AboutMe()       {           Console.WriteLine("李氏 dog says: Bow-Wow.I prefer to stay at home.");       }   }   /// <summary>   /// Concrete Factory 1-Wild Animal Factory   /// </summary>   public class WildAnimalFactory : IAnimalFactory   {         public ITiger GetTiger()       {           return new WildTiger();       }       public IDog GetDog()       {           return new WildDog();       }   }   /// <summary>   /// Concrete Factory 2-Pet Animal Factory   /// </summary>   public class PetAnimalFactory : IAnimalFactory   {       public IDog GetDog()       {           return new PetDog();       }         public ITiger GetTiger()       {           return new PetTiger();       }   }   /// <summary>   /// Factory provider   /// </summary>   class FactoryProvider   {       /// <summary>       ///       /// </summary>       /// <param name="factoryType"></param>       /// <returns></returns>       /// <exception cref="ArgumentException"></exception>       public static IAnimalFactory GetAnimalFactory(string factoryType)       {           if (factoryType.Contains("涂氏"))           {               // Returning a WildAnimalFactory               return new WildAnimalFactory();           }           else                 if (factoryType.Contains("李氏"))           {               // Returning a PetAnimalFactory               return new PetAnimalFactory();           }           else           {               throw new ArgumentException("You need to pass either wild or pet as argument.");           }       }   }

　　

调用：

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//Abstract Factory抽像工厂            Console.WriteLine("***Abstract Factory Pattern Demo.***\n");              //Making a wild dog and wild tiger through WildAnimalFactory            IAnimalFactory animalFactory = FactoryProvider.GetAnimalFactory("涂氏");            IDog dog = animalFactory.GetDog();            ITiger tiger = animalFactory.GetTiger();            dog.AboutMe();            tiger.AboutMe();              Console.WriteLine("******************");              //Making a pet dog and pet tiger through PetAnimalFactory now.            animalFactory = FactoryProvider.GetAnimalFactory("李氏");            dog = animalFactory.GetDog();            tiger = animalFactory.GetTiger();            dog.AboutMe();            tiger.AboutMe();              //            var basic = Demo.GetFactory(false);            var basicRectangle = basic.Create(Shape.Rectangle);            basicRectangle.Draw();              var roundedSquare = Demo.GetFactory(true).Create(Shape.Square);            roundedSquare.Draw();              Console.ReadLine();

　　

输出：

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***Abstract Factory Pattern Demo.***   涂氏 dog says: I prefer to roam freely in jungles.Bow-Wow. 涂氏 tiger says: I prefer hunting in jungles.Halum. ****************** 李氏 dog says: Bow-Wow.I prefer to stay at home. 李氏 tiger says: Halum.I play in an animal circus. Basic rectangle Rounded square ***Abstract Factory Pattern Demo.***