行爲型模式-備忘錄memento

在不破壞封裝性的前提下，捕獲一個對象的內部狀態，並在該對象之外保存這個狀態。這樣以後就可以將該對象恢復到原先保存的狀態。

 

using System;
using System.Collections.Generic;
using System.Text;

namespace 備忘錄模式
{
    class Program
    {
        static void Main(string[] args)
        {

            //大戰Boss前
            GameRole lixiaoyao = new GameRole();
            lixiaoyao.GetInitState();
            lixiaoyao.StateDisplay();

            //保存進度
            RoleStateCaretaker stateAdmin = new RoleStateCaretaker();
            stateAdmin.Memento = lixiaoyao.SaveState();

            //大戰Boss時，損耗嚴重
            lixiaoyao.Fight();
            lixiaoyao.StateDisplay();

            //恢復之前狀態
            lixiaoyao.RecoveryState(stateAdmin.Memento);

            lixiaoyao.StateDisplay();


            Console.Read();

        }
    }

    class GameRole
    {
        //生命力
        private int vit;
        public int Vitality
        {
            get { return vit; }
            set { vit = value; }
        }

        //攻擊力
        private int atk;
        public int Attack
        {
            get { return atk; }
            set { atk = value; }
        }

        //防禦力
        private int def;
        public int Defense
        {
            get { return def; }
            set { def = value; }
        }

        //狀態顯示
        public void StateDisplay()
        {
            Console.WriteLine("角色當前狀態：");
            Console.WriteLine("體力：{0}", this.vit);
            Console.WriteLine("攻擊力：{0}", this.atk);
            Console.WriteLine("防禦力：{0}", this.def);
            Console.WriteLine("");
        }

        //保存角色狀態
        public RoleStateMemento SaveState()
        {
            return (new RoleStateMemento(vit, atk, def));
        }

        //恢復角色狀態
        public void RecoveryState(RoleStateMemento memento)
        {
            this.vit = memento.Vitality;
            this.atk = memento.Attack;
            this.def = memento.Defense;
        }


        //獲得初始狀態
        public void GetInitState()
        {
            this.vit = 100;
            this.atk = 100;
            this.def = 100;
        }

        //戰鬥
        public void Fight()
        {
            this.vit = 0;
            this.atk = 0;
            this.def = 0;
        }
    }

    //角色狀態存儲箱
    class RoleStateMemento
    {
        private int vit;
        private int atk;
        private int def;

        public RoleStateMemento(int vit, int atk, int def)
        {
            this.vit = vit;
            this.atk = atk;
            this.def = def;
        }

        //生命力
        public int Vitality
        {
            get { return vit; }
            set { vit = value; }
        }

        //攻擊力
        public int Attack
        {
            get { return atk; }
            set { atk = value; }
        }

        //防禦力
        public int Defense
        {
            get { return def; }
            set { def = value; }
        }
    }

    //角色狀態管理者
    class RoleStateCaretaker
    {
        private RoleStateMemento memento;

        public RoleStateMemento Memento
        {
            get { return memento; }
            set { memento = value; }
        }
    }


}