学步园

/// <summary>
    /// 交易信息
    /// </summary>
    public sealed class DealInfo
    {
        /// <summary>
        /// 金额
        /// </summary>
        public double Money {get;set;}
    }
    /// <summary>
    /// 管理者基类
    /// </summary>
    public abstract class ManagerBase
    {
        /// <summary>
        /// 处理外部请求，
        /// 注意：子类是internal的，这意味着
        /// 外界看不到具体子类，只能看到这个基类，
        /// 只由这个基类来与外界交互
        /// </summary>
        /// <param name="d"></param>
        public static void BeginHandle(DealInfo d)
        {
            new TeamLeader().Handle(d);
        }
        public abstract void Handle(DealInfo d);
    }
    /// <summary>
    /// 项目Leader
    /// </summary>
    internal class TeamLeader : ManagerBase
    {
        public override void Handle(DealInfo d)
        {
            if (d.Money < 1000)
            {
                Console.WriteLine(this.GetType() + " Handle.");
                return;
            }
            new DeptDirector().Handle(d);
        }
    }
    /// <summary>
    /// 部门主管
    /// </summary>
    internal class DeptDirector : ManagerBase
    {
        public override void Handle(DealInfo d)
        {
            if (d.Money>=1000 && d.Money<10000)
            {
                Console.WriteLine(this.GetType() + " Handle.");
                return;
            }
            new GeneralManager().Handle(d);
        }
    }
    /// <summary>
    /// 总经理
    /// </summary>
    internal class GeneralManager : ManagerBase
    {
        public override void Handle(DealInfo d)
        {
            if (d.Money>=10000 && d.Money <100000)
            {
                Console.WriteLine(this.GetType() + " Handle.");
                return;
            }
            new Chairman().Handle(d);
        }
    }
    /// <summary>
    /// 总裁
    /// </summary>
    internal class Chairman : ManagerBase
    {
        public override void Handle(DealInfo d)
        {
            if (d.Money>=100000)
            {
                Console.WriteLine(this.GetType() + " Handle.");
            }
        }
    }
public static void ChainPattern()
        {
            //一，职责链模式主要目的：
            //1，隔离请求者和具体处理者，请求着不用关心具体是谁最终处理了请求，
            //只管发送请求信息即可，请求的处理细节由处理者来处理即可。
            //二，职责链模式应用：1，OA中的审批流程  2，log4net中的Filter功能
            //三，本示例即OA的审批流程
            ManagerBase.BeginHandle(new DealInfo() {  Money=50000});
        }