广播(观察者模式)

来源：互联网发布：java语言基础考试题编辑：程序博客网时间：2024/05/16 08:55

public interface IListener
{
void tagDeleted(ITTag iobj);
void tagAdded(ITTag iobj);
void tagModified(ITTag iobj);
}

public class Plugin1 : IListener
{
public Plugin1()
{
TTTBManager.getManager().AddListener(this);
}

public void tagDeleted(ITTag iobj)
{ }

public void tagAdded(ITTag iobj)
{ }

public void tagModified(ITTag iobj)
{ }

//发出广播

void CreadteTag()
{
TTTBManager.getManager().NotifyTagAdded(this, new TTagBlend());
}
}

//广播管理

public class TTTBManager
{
static private TTTBManager _manager = null;
private List<IListener> _ListenerList = new List<IListener>();

private TTTBManager()
{ }

static public TTTBManager getManager()
{
  if(_manager == null)
  {
   _manager = new TTTBManager();
  }
  return _manager;
}

public void AddListener(IListener listener)
{
  if (!_ListenerList.Contains(listener))
  {
   _ListenerList.Add(listener);
  }
}

public void NotifyTagDeleted(IListener listener, ITTag obj)
{
   foreach(IListener lis in _ListenerList)
   {
    if (lis == listener)
    {
     continue;
    }
    lis.tagDeleted(obj);
   }
}

public void NotifyTagAdded(IListener listener, ITTag obj)
{

  foreach (IListener lis in _ListenerList)
  {
   if (lis == listener)
   {
    continue;
   }
   lis.tagAdded(obj);
  }
}

public void NotifyTagModified(IListener listener, ITTag obj)
{
  foreach (IListener lis in _ListenerList)
  {
   if (lis == listener)
   {
    continue;
   }
   lis.tagModified(obj);
  }
}
}

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