/// <summary>
///
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
//定义外部状态，例如字母的位置等信息
int externalstate = 10;
//初始化享元工厂
FlyweightFactory factory = new FlyweightFactory();
;
//判断是否已经创建了字母A，如果已经创建就直接使用创建的对象A
Flyweight fA = factory.GetFlyweight("A");
if (fA != null)
{
//把外部状态作为享元对象的方法调用参数
fA.Operation(--externalstate);
}
//判断是否已经创建了字母B
Flyweight fB = factory.GetFlyweight("B");
if (fB != null)
{
fB.Operation(--externalstate);
}
Flyweight fC = factory.GetFlyweight("C");
if (fC != null)
{
fC.Operation(--externalstate);
}
Flyweight fD = factory.GetFlyweight("D");
if (fD != null)
{
fD.Operation(--externalstate);
}
else
{
Console.WriteLine("驻留池中不存在字符串D");
Console.WriteLine("向驻留池添加字符D。。。。");
ConcreteFlyweight d = new ConcreteFlyweight("D");
factory.flyweights.Add("D", d);
}
Flyweight fD2 = factory.GetFlyweight("D");
if (fD2 != null)
{
fD2.Operation(--externalstate);
}
Console.Read();
}
public Flyweight GetFlyweight(string key)
{
if (!flyweights.ContainsKey(key))
{
return(null);
}
Flyweight flyweight = flyweights[key] as Flyweight;
if (flyweight == null)
{
Console.WriteLine($"驻留池中不存在字符串{key}");
flyweight = new ConcreteFlyweight(key);
}
return(flyweight);
// return flyweights[key] as Flyweight;
}
