C# 设计模式（15）责任链模式

责任链模式

1.逻辑封装和转移

代码实现：

上下文：

    public class ApplyContext
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public int Hour { get; set; }
        public string Description { get; set; }
        public string AuditRemark { get; set; }
        public bool AuditResult { get; set; }
    }

抽象类：

    public abstract class AbstractAuditor
    {

        private AbstractAuditor _nextAuditor = null;

        public void SetNextAuditor(AbstractAuditor nextAuditor)
        {
            _nextAuditor = nextAuditor;
        }

        public abstract void Audit(ApplyContext applyContext);

        protected void NextAudit(ApplyContext applyContext)
        {
            if (_nextAuditor != null)
            {
                _nextAuditor.Audit(applyContext);
            }
        }
    }

实体类：

    public class PM : AbstractAuditor
    {
        public override void Audit(ApplyContext applyContext)
        {
            if(applyContext.Hour<8)
            {
                applyContext.AuditResult = true;
                Console.WriteLine("PM 审核完成！享受你的假期吧");
            }
            else
            {
                base.NextAudit(applyContext);
            }
        }
    }
    public class Charge : AbstractAuditor
    {
        public override void Audit(ApplyContext applyContext)
        {
            if(applyContext.Hour<16)
            {
                applyContext.AuditResult = true;
                Console.WriteLine("主管 审核完成！享受你的假期吧");
            }
            else
            {
                base.NextAudit(applyContext);
            }
        }
    }
    public class Manager : AbstractAuditor
    {
        public override void Audit(ApplyContext applyContext)
        {
            if(applyContext.Hour<24)
            {
                Console.WriteLine("经理 审核完成！享受你的假期吧");
            }
            else
            {
                base.NextAudit(applyContext);
            }
        }
    }

代码调用：

    class Program
    {
        static void Main(string[] args)
        {
            ApplyContext applyContext = new ApplyContext()
            {
                Id = 01,
                Name = "Alex",
                Hour = 12,
                Description = "Vacation",
                AuditResult = false,
                AuditRemark = ""
            };

            PM pM = new PM();
            Charge charge = new Charge();
            Manager manager = new Manager();
            pM.SetNextAuditor(manager);

            pM.Audit(applyContext);
        }
    }

结果：