C# Flyweight – テックメモ

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;
        }
    }
}

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;

}