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  • factorymethodavocados.cs

      using System;
      using System.Collections;

      class FactoryPattern {
     
      // Factory Method Pattern       Judith Bishop 2006
      //  Example of exporting from different suppliers
        
      interface IProduct {
        string ShipFrom();
      }

      class ProductA : IProduct {
        public String ShipFrom () {
          return " from South Africa";
        }
      }
     
      class ProductB : IProduct {
        public String ShipFrom () {
                return "from Spain";
        }
      }

      class DefaultProduct : IProduct {
        public String ShipFrom () {
                return "not available";
        }
      }

      class Creator {
        public  IProduct FactoryMethod(int month) {
          if (month >= 4 && month <=11)
            return new ProductA();
          else
          if (month == 1 || month == 2 || month == 12)
            return new ProductB();
          else
            return new DefaultProduct();
        }
      }
     
        static void Main() {
          Creator c = new Creator();
          IProduct product;
            
          for (int i=1; i<=12; i++) {
            product = c.FactoryMethod(i);
            Console.WriteLine("Avocados "+product.ShipFrom());
          }
        }
      }
     
    /* Output
    Avocados from Spain
    Avocados from Spain
    Avocados not available
    Avocados  from South Africa
    Avocados  from South Africa
    Avocados  from South Africa
    Avocados  from South Africa
    Avocados  from South Africa
    Avocados  from South Africa
    Avocados  from South Africa
    Avocados  from South Africa
    Avocados from Spain
    */
     

     
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  • 原文地址:https://www.cnblogs.com/shihao/p/2500462.html
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