import java.util.*;

/**
 * The Space class where messages are sent and which notifies registered listeners.
 * <br>Observer Design Pattern -- "Gossip" example for COM1204 Summer 2003.
 *
 * @author Bob Futrelle
 * @version 0.1, 28 June 2003
 *
 */
 public class Space {
 	
	public String name;
	public ArrayList registeredListeners;
	
	public Space(String name){ 
			this.name = name;
			registeredListeners = new ArrayList();			
	}
	
	/** Allows a TalkerListener to be placed on the registered listeners list.
	*/
	public void addTalkListener(TalkerListener listener) {
			registeredListeners.add(listener);
	}
	/** When a TalkerListener says something, its local space is informed.
	*/
	public void notifySpace(Message msg) {
		Iterator listeners = registeredListeners.iterator();
		while(listeners.hasNext()){
			((TalkerListener)listeners.next()).notifyMe(msg);
			}
	}

 } // class Space