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Wed Mar 24 16:00:00 GMT 2004
AbstractionImplementation
package examples.bridge.aspectj; /* -*- 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): */ /** * Represents the <i>Abstraction</i> in the scenario. <code>Screen</code> * provides two methods to draw/print: <code>drawText(String)</code> and * <code>drawTextBox(String)</code>. The method implementations are provided * by an aspect. * * @author Jan Hannemann * @author Gregor Kiczales * @version 1.0, 05/13/02 * */ public aspect AbstractionImplementation { /** * stores the actual <i>Implementor</i> to use */ private ScreenImplementation Screen.implementor; /** * Draws or prints a text to an output device determined by the * current <i>Implementor</i>. * * @param text The text to be drawn/printed */ public void Screen.drawText(String text) { implementor.printText(text); implementor.printLine(); } /** * Draws or prints a text in a box to an output device determined * by the current <i>Implementor</i>. * * @param text The text to be drawn/printed */ public void Screen.drawTextBox(String text) { int length = text.length(); for(int i=0; i<length+4; i++) { implementor.printDecor(); } implementor.printLine(); implementor.printDecor(); implementor.printText(" "+text+" "); implementor.printDecor(); implementor.printLine(); for(int i=0; i<length+4; i++) { implementor.printDecor(); } implementor.printLine(); } /** * Sets the current <i>Implementor</i>. * * @param implementor The new implementor */ public void Screen.setImplementor(ScreenImplementation implementor) { this.implementor = implementor; } }
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