[C# 디자인패턴] 제10강 데코레이터패턴

예제 코드

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace CSharp_DecoratorPattern
{
    abstract class Component
    {
        public abstract void Operation();
    }
 
    class ConcreteComponent : Component
    {
        public override void Operation()
        {
            Console.WriteLine("ConcreteComponent.Operation()");
        }
    }
 
    abstract class Decorator : Component
    {
        protected Component component;
 
        public void SetComponent(Component component)
        {
            this.component = component;
        }
 
        public override void Operation()
        {
            if (component != null)
            {
                component.Operation();
            }
        }
    }
 
    class ConcreteDecoratorA : Decorator
    {
        public override void Operation()
        {
            base.Operation();
            Console.WriteLine("ConcreteDecoratorA.Operation()");
        }
    }
 
    class ConcreteDecoratorB : Decorator
    {
        public override void Operation()
        {
            base.Operation();
            AddedBehavior();
            Console.WriteLine("ConcreteDecoratorB.Operation()");
        }
 
        void AddedBehavior()
        {
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            ConcreteComponent c = new ConcreteComponent();
            ConcreteDecoratorA d1 = new ConcreteDecoratorA();
            ConcreteDecoratorB d2 = new ConcreteDecoratorB();
 
            d1.SetComponent(c);
            d2.SetComponent(d1);
 
            d2.Operation();
 
            Console.ReadKey();
        }
    }
}