public class Client
{
static private Hashtable ht = new Hashtable();
static protected Client c = null;
protected Client()
{
}
public static Client Instance()
{
if(c == null)
c = new Client();
return c;
}
public void Register(String name, CloneHuman ch)
{
ht.Add(name, ch);
}
public CloneHuman BuildCloneHuman(String name)
{
CloneHuman ch = (CloneHuman)ht[name];
return ch.CreateClone();
}
}
克隆人的类, 以及分别它的子类克隆的男人和女人
public class CloneHuman
{
public virtual CloneHuman CreateClone()
{
return null;
}
public void Show()
{
String s = this.GetType().ToString();
Console.WriteLine(s.Substring(s.LastIndexOf(".")+1));
}
}
public class CloneMale : CloneHuman
{
public override CloneHuman CreateClone()
{
return (CloneHuman)this.MemberwiseClone();
}
}
public class CloneFemale : CloneHuman
{
public override CloneHuman CreateClone()
{
return (CloneHuman)this.MemberwiseClone();
}
}
测试程序
public static void Main()
{
Client c = Client.Instance();
CloneMale cm = new CloneMale();
CloneFemale cf = new CloneFemale();
c.Register("CloneMale", cm);
c.Register("CloneFemale", cf);
for(Int32 i=0; i<10; i++)
{
String name = (i%2==0)?"CloneMale":"CloneFemale";
CloneHuman ch = c.BuildCloneHuman(name);
ch.Show();
}
Console.ReadLine();
}
