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1   // ////////////////////////////////////////////////////////////////////////////
2   // dexterIM - Instant Messaging Framework
3   // Copyright (C) 2003 Christoph Walcher
4   //
5   // This program is free software; you can redistribute it and/or modify
6   // it under the terms of the GNU General Public License as published by
7   // the Free Software Foundation; either version 2 of the License, or
8   // (at your option) any later version.
9   //
10  // This program is distributed in the hope that it will be useful,
11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  // GNU General Public License for more details.
14  //
15  // You should have received a copy of the GNU General Public License
16  // along with this program; if not, write to the Free Software
17  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18  //////////////////////////////////////////////////////////////////////////////
19  package net.sf.dexterim.core;
20  
21  import java.util.ArrayList;
22  import java.util.Iterator;
23  import java.util.List;
24  
25  import net.sf.dexterim.core.event.*;
26  import net.sf.dexterim.core.event.ContactListEvent;
27  
28  
29  /***
30   * @author christoph
31   *
32   */
33  public abstract class AbstractContactList implements ContactList {
34  	private List listeners;
35  	
36  	public AbstractContactList() {
37  		this.listeners = new ArrayList();
38  	}
39  	
40  	
41  	/***
42  	 * @see net.sf.dexterim.core.ContactList#addContactListener(net.sf.dexterim.core.ContactListener)
43  	 */
44  	public void addContactListener(ContactListListener listener) {
45  		listeners.add(listener);
46  	}
47  	
48  	
49  	/***
50  	 * @see net.sf.dexterim.core.ContactList#removeContactListener(net.sf.dexterim.core.ContactListener)
51  	 */
52  	public void removeContactListener(ContactListListener listener) {
53  		listeners.remove(listener);
54  	}
55  	
56  	protected void fireContactAdded(int index) {
57  		
58  		ContactListEvent event = null;
59  		
60  		for (Iterator iter = listeners.iterator(); iter.hasNext();) {
61  			
62  			if (event == null) {
63  				event = new ContactListEvent(this, index);
64  			}
65  			
66  			((ContactListListener) iter.next()).contactAdded(event);
67  		}
68  	}
69  }