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Wed Mar 24 16:00:00 GMT 2004
Main
package examples.decorator.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.pattern. * * Contributor(s): */ /** * Implements the driver for the decorator design pattern example.<p> * * Intent: <i>Attach additional responsibilities to an object dynamically. * Decorators provide a flexible alternative to subclassing for extending * functionality.</i><p> * * Participating classes are <code>Output</code>s as <i>Component</i>s, * <code>ConcreteOutput</code> as <i>ConcreteComponent</i>. The decorators * are <code>OutputDecorator</code> as <i>Decorator</i>, and <code> * StarDecorator</code> and <code>BracketDecorator</code> as <i> * ConcreteDecorator</i>s.<p> * * Experimental setup: Concrete decorator (ConcreteOutput) prints a * string, Decorators (StarDecorator and BracketDecorator) wrap other * output around it. Output should be: "[ *** <String> *** ]" * * <p><i>This is the Java version.</i><p> * * This version allows for dynamic composition of decorators. * * @author Jan Hannemann * @author Gregor Kiczales * @version 1.0, 06/13/02 * * @see Component * @see CompositeA * @see LeafB */ public class Main { /** * Implements the driver for the decorator design pattern example.<p> * * Experimental setup: Concrete decorator (ConcreteOutput) prints a * string, Decorators (StarDecorator and BracketDecorator) wrap other * output around it. Output should be: "[ *** <String> *** ]" * * @param args command line paramters, unused */ public static void main(String[] args) { Output original = new ConcreteOutput(); Output stared = new StarDecorator(original); Output bracketed= new BracketDecorator(stared); bracketed.print("<String>"); System.out.println(); } }
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