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namespace ConsoleApplication2 { class Program { static void Main(string[] args) { new caretaker(); System.Console.ReadKey(); } } /* Memento インスタンスのスナップショット */ public class Memento//記念品 { public int param = 1; public Memento(int p) { this.param = p; } } public class caretaker { System.Collections.Generic.Dictionary<string, Memento> dic = new System.Collections.Generic.Dictionary<string, Memento>(); public caretaker() { Originator o = new Originator(); o.CalcSum(1,2); dic.Add("first snapshot", o.CreateMemento()); o.CalcSum(3, 2); dic.Add("second snapshot", o.CreateMemento()); o.SetMemento(dic["first snapshot"]); System.Console.WriteLine(o.param.ToString()); } } public class Originator//作成者 { public int param; public void CalcSum(int x,int y) { this.param = x + y; } public Memento CreateMemento() { return new Memento(param); } public void SetMemento(Memento m) { this.param = m.param; } } } |