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namespace ConsoleApplication2 { class Program { static void Main(string[] args) { } } /* Flyweight イミュータブルなクラス(フィールド値が不変のような)を再利用する。 */ public class Flyweight{ } public class FlyweightFactory { private FlyweightFactory f = new FlyweightFactory(); private FlyweightFactory(){ } private System.Collections.Generic.Dictionary<int,Flyweight> dic = new System.Collections.Generic.Dictionary<int, Flyweight>(); public FlyweightFactory GetInstance() { return f; } public Flyweight GetFlyweight(int key) { Flyweight f = dic[key]; if(f == null) { f = new Flyweight(); dic.Add(key, f); } return f; } } } |