public static Flyweight getSignInfo(ExtrinsicState key)
{
Flyweight flyweight = null;
foreach (KeyValuePair <ExtrinsicState, Flyweight> pair in pool)
{
if (pair.Key.hashCode() == key.hashCode() && pair.Key.equals(key))
{
flyweight = pool[pair.Key];
}
}
if (flyweight == null)
{
flyweight = new ConcreteFlyweight1(key);
pool[key] = flyweight;
}
return(flyweight);
}
public static void main()
{
ExtrinsicState state1 = new ExtrinsicState();
state1.setSubject("科目1");
state1.setLocaltion("上海");
ExtrinsicState state2 = new ExtrinsicState();
state2.setSubject("科目1");
state2.setLocaltion("上海");
FlyweightFactory.getSignInfo(state1);
FlyweightFactory.getSignInfo(state2);
SignInfoFactory.getSignInfobyString(state1.getSubjectandLocation());
SignInfoFactory.getSignInfobyString(state2.getSubjectandLocation());
//第一个版本，直接用ExtrinsicState结构作为索引的时候
long time = System.DateTime.Now.Ticks;
for (int index = 0; index < 10000000; index++)
{
FlyweightFactory.getSignInfo(state2);
}
long curtime = System.DateTime.Now.Ticks;
Console.WriteLine("直接用ExtrinsicState结构作为索引的时候 执行时间=" + (curtime - time) + "ticks" + ",startTime=" + time + ",endTime=" + curtime);
//第二个版本，用string作为索引的时候
long time2 = System.DateTime.Now.Ticks;
string strKey = state2.getSubject() + "." + state2.getLocation();
for (int index = 0; index < 10000000; index++)
{
SignInfoFactory.getSignInfobyString(strKey);
}
long curtime2 = System.DateTime.Now.Ticks;
Console.WriteLine("用string作为索引的时候 执行时间=" + (curtime2 - time2) + "ticks" + ",startTime=" + time2 + ",endTime=" + curtime2);
}
//进化版本，优化索引问题
public static Flyweight getSignInfobyString(string key)
{
Flyweight flyweight = null;
foreach (KeyValuePair <ExtrinsicState, Flyweight> pair in pool)
{
if (pair.Key.hashCode() == key.GetHashCode() && pair.Key.getLocation() == key)
{
flyweight = pool[pair.Key];
}
}
if (flyweight == null)
{
ExtrinsicState newState = new ExtrinsicState();
newState.setSubject(key.Split('.')[0]);
newState.setLocaltion(key.Split('.')[1]);
flyweight = new ConcreteFlyweight1(newState);
pool[newState] = flyweight;
}
return(flyweight);
}
public ConcreteFlyweight2(ExtrinsicState Extrinsic) : base(Extrinsic)
{
}
public bool equals(ExtrinsicState otherState)
{
return(this.subject == otherState.subject && this.location == otherState.location);
}
protected readonly ExtrinsicState Extrinsic;//外部状态只能被写一次
public Flyweight(ExtrinsicState Extrinsic)
{
this.Extrinsic = Extrinsic;
}