[C# 디자인패턴] 제17강 전략 패턴

예제 코드

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace CSharp_StrategyPattern
{
    abstract class Strategy
    {
        public abstract void AlgorithmInterface();
    }
 
    class ConcreteStrategyA : Strategy
    {
        public override void AlgorithmInterface()
        {
            Console.WriteLine(
              "Called ConcreteStrategyA.AlgorithmInterface()");
        }
    }
 
    class ConcreteStrategyB : Strategy
    {
        public override void AlgorithmInterface()
        {
            Console.WriteLine(
              "Called ConcreteStrategyB.AlgorithmInterface()");
        }
    }
 
    class ConcreteStrategyC : Strategy
    {
        public override void AlgorithmInterface()
        {
            Console.WriteLine(
              "Called ConcreteStrategyC.AlgorithmInterface()");
        }
    }
 
    class Context
    {
        private Strategy _strategy;
        
        public Context(Strategy strategy)
        {
            this._strategy = strategy;
        }
 
        public void ContextInterface()
        {
            _strategy.AlgorithmInterface();
        }
    }
 
    class Program
    {
        static void Main(string[] args)
        {
            Context context;
 
            context = new Context(new ConcreteStrategyA());
            context.ContextInterface();
 
            context = new Context(new ConcreteStrategyB());
            context.ContextInterface();
 
            context = new Context(new ConcreteStrategyC());
            context.ContextInterface();
 
            Console.ReadKey();
        }
    }
}