/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.events;
/**
* An event.
*
* Holds a list of {@link EventListener4} objects
* which receive {@link EventListener4#onEvent(Event4, EventArgs)}
* notifications whenever this event is triggered.
*
* @sharpen.ignore
*/
public interface Event4<T extends EventArgs> {
/**
* Adds a new listener to the notification list..
*
* @sharpen.event.add
*/
public void addListener(EventListener4<T> listener);
/**
* Removes a previously registered listener from the notification list.
*/
public void removeListener(EventListener4<T> listener);
}