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Wed Mar 24 16:00:00 GMT 2004
Main
package examples.proxy.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 proxy design pattern example.<p> * * Intent: <i>Provide a surrogate or placeholder for another object to control * access to it.</i><p> * * Participatng objects are <code>RealSubject</code>s and <code>Proxy</code>. * Both implement the <code>Subject</code> interface. * * <i>Proxy</i> forwards or blocks requests to <i>RealSubject</i> * * <p><i>This is the Java version.</i><p> * * <code>Proxy</code> needs to implement all methods of <i>Subject</i>, even * those it is not interested in. <i>Proxy</i> needs to be aware of its role * in the pattern. * * @author Jan Hannemann * @author Gregor Kiczales * @version 1.0, 05/13/02 * * @see Subject * @see RealSubject * @see Proxy */ public class Main { /** * Implements the driver for the proxy design pattern. Experimental setup: * The proxy is to count the number of calls to RealSubject.print(String). * It is not interested in calls to Subject.write(String). * Proxy has to implement all method of subject, even those that are of * no interest. */ public static void main (String[] args) { Subject real = new RealSubject(); Subject proxy = new Proxy(real); proxy.print("PRINT"); proxy.write("WRITE"); proxy.print("PRINT"); proxy.write("WRITE"); } }
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