[Creational Pattern] - Abstract Factory

https://refactoring.guru/design-patterns/abstract-factory

Abstract Factory

 

특정 상황에 걸맞는 특정 object의 생성을 관련 factory 확장을 통하여 구현하고자 할때. 

 

=> 각자 경우에 맞는 case code가 한군데 합쳐지는 것이 아닌 각자 concrete 생성 class에서 처리하게 된다.

 

예시

Platform Resolution Handler

Platform Specific UX Handler 

각자에 맞는 factory를 생성하면 해당 factory에서 각 platform에 맞는 관련 생성을 처리한다. 

 

예시 code 

public class AbstractFactoryDemo
{
    public interface IResolutionHandler
    {
        void Init();
        int GetWidth();
        int GetHeight();
    }
    public class IOSResolutionHandler : IResolutionHandler
    {
        public void Init() { }
        public int GetWidth() { return 0;}
        public int GetHeight() { return 0;}
    }
    public class AndroidResolutionHandler : IResolutionHandler
    {
        public void Init() { }
        public int GetWidth() { return 0;}
        public int GetHeight() { return 0;}
    }



    public interface IHandlerFactory
    {
        IResolutionHandler CreateResolutionHandler();
    }

    public class IOSHandlerFactory : IHandlerFactory
    {
        public IResolutionHandler CreateResolutionHandler()
        {
            return new IOSResolutionHandler();
        }
    }
    public class AndroidHandlerFactory : IHandlerFactory
    {
        public IResolutionHandler CreateResolutionHandler()
        {
            return new AndroidResolutionHandler();
        }
    }





    public void Main()
    {
        bool isAndroid = false;
        IHandlerFactory factory = isAndroid ? new AndroidHandlerFactory() : new IOSHandlerFactory();
        IResolutionHandler handler = factory.CreateResolutionHandler();
        handler.Init();
        handler.GetWidth();
    }
}