public Flyweight GetFlyweight(string key)
{
Flyweight flyweight = null;
if (flyweights.ContainsKey(key))
{
return(flyweights[key] as Flyweight);
}
if (flyweights == null)
{
Console.WriteLine("驻留池中不存在字符串" + key);
flyweight = new ConcreteFlyweight(key);
}
return(flyweight as Flyweight);
}
public override void Open()
{
//定义外部状态
int externalstate = 10;
//初始化享元工厂
FlyweightFactory factory = new FlyweightFactory();
//判断是否有A字符
Flyweight fa = factory.GetFlyweight("A");
if (fa != null)
{
fa.Operation(externalstate);
}
//判断B字符
Flyweight fb = factory.GetFlyweight("B");
if (fb != null)
{
fb.Operation(externalstate);
}
//判断C字符
Flyweight fc = factory.GetFlyweight("C");
if (fc != null)
{
fc.Operation(externalstate);
}
//判断D字符
Flyweight fd = factory.GetFlyweight("D");
if (fd != null)
{
fd.Operation(externalstate);
}
else
{
Console.WriteLine("不存在字符串D");
ConcreteFlyweight d = new ConcreteFlyweight("D");
factory.flyweights.Add("D", d);
}
Console.WriteLine("");
Console.Read();
}
