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Wed Mar 24 16:00:00 GMT 2004
Mediator
package examples.mediator.java; /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * This file is part of the design patterns project at UBC * * The contents of this file are subject to the Mozilla Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/. * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is ca.ubc.cs.spl.patterns. * * Contributor(s): */ /** * Implements the driver for the mediator design pattern example.<p> * * Intent: <i>Define an object that encapsulates how a set of objects * interact. Mediator promotes loose coupling by keeping objects from * referring to each other explicitly, and it lets you vary their interaction * independently.</i><p> * * Participatng objects are <code>Button</code>s as <i>Colleague</i>s, * and a <code>Label</code> as <i>Mediator</i>. * * Every time an event of interest (a button click) occurs, the mediating * <code>Label</code> is updated and it updates the calling button. * * <p><i>This is the Java version.</i><p> * * Both <i>Mediator</i> and <i>Colleagues</i> have to be aware of their role * within the pattern. * * @author Jan Hannemann * @author Gregor Kiczales * @version 1.0, 05/13/02 * */ public interface Mediator { /** * Defines the method signature for notifying mediators of changes to * colleagues. This method is called by colleagues who pass themselves * as an argument (push). * * @param mediator the new mediator */ public void colleagueChanged(Colleague colleague); }
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