Abstract Factory 抽象工厂模式(创建型)

抽象工厂结构图
 
试例代码

//道路
public abstract class Road
{
}
//建筑
public abstract class Building
{
}
//地道
public abstract class Tunnel
{
}
//丛林
public abstract class Jungle
{
}
//工厂类
abstract class FacilitiesFactory
{
 public abstract Road CreateRoad();
 public abstract Building CreateBuilding();
 public abstract Tunnel CreateTunnel();
 public abstract Jungle CreateJungle();
}
//客户类
class GameManager
{
 Road road;
 Building building;
 Tunnel tunnel;
 Jungle jungle;

 FacilitiesFactory facilitiesFactory;
 public GameManager(FacilitiesFactory facilitiesFactory )
{
 this.facilitiesFactory=facilitiesFactory;
}
 public BuildGameFactory()
 {
  road = facilitiesFactory.CreateRoad();
  building = facilitiesFactory.CreateBuildingd();
  tunnel = facilitiesFactory.CreateTunnel();
  jungle = facilitiesFactory.CreateJungle();
 }

  public void Run()
  {
   road.AAA();
   building.BBB(road);
   tunnel.CCC();
   jungle.DDD(tunnel);
  }
}

//应用
class App
{
 public static void Main()
 {
  GameManager g = new GameManager(new ModernFacilitiesFactory);
  g.BuildGameFactory();
  g.Run();
 }
}

//现代风格
//道路
public class ModernRoad:Road
{
}
//建筑
public class ModernBuilding:Building
{
}
//地道
public class ModernTunnel:Tunnel
{
}
//丛林
public class ModernJungle:Jungle
{
}

//工厂类
public class ModernFacilitiesFactory:FacilitiesFactory
{
 public override Road CreateRoad()
  {
   return new ModernRoad();
  }
 public override Building CreateBuilding()
  {
   return new ModernBuilding();
  }
 public override Tunnel CreateTunnel()
  {
   return new ModernTunnel();
  }
 public override Jungle CreateJungle()
  {
   return new ModernJungle();
  }
}