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   package net.mlw.fball.event;
   
   import java.util.ArrayList;
   import java.util.HashMap;
   import java.util.Iterator;
   import java.util.List;
   import java.util.Map;
   
   import net.mlw.fball.gui.events.StateChangedEvent;
  
  /***
   * 
   * @author Matthew L. Wilson
   * @version $Revision: 1.1 $ $Date: 2004/03/01 15:31:42 $
   */
  public class EventListenerGroup implements EventListener
  {
     protected Map listeners = new HashMap();
  
     public void addListener(Class klass, EventListener listener)
     {
        List list = (List) listeners.get(klass.getName());
        if (list == null)
        {
           listeners.put(klass.getName(), list = new ArrayList());
        }
        list.add(listener);
     }
  
     /*** @see net.mlw.fball.event.EventListener#onEvent(net.mlw.fball.event.Event)
      */
     public void onEvent(Event event)
     {
        if (event == null)
        {
           return;
        }
  
        String key = (event instanceof StateChangedEvent) ? ((StateChangedEvent) event).getName() : event.getClass().getName();
  
        List list = (List) listeners.get(key);
        if (list != null)
        {
           for (Iterator iter = list.iterator(); iter.hasNext();)
           {
              EventListener listener = (EventListener) iter.next();
              listener.onEvent(event);
           }
        }
        else
        {
           System.out.println("'" + key + "' listener not found.");
        }
  
     }
  }