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Wed Mar 24 16:00:00 GMT 2004
Component
package examples.composite.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): */ /** * Defines the <i>Component</i> interface for the composite design pattern.<p> * The implementation is anologuous to the one presented in GoF. Contemporary * Java implementations would probably change the <code>getChild(int)</code> * and <code>getChildCount()</code> methods to a single method that returns * a <code>Collection</code>. The AspectJ version has an appropriate * implementation. * * @author Jan Hannemann * @author Gregor Kiczales * @version 1.0, 05/13/02 * * @see CompositeA * @see LeafB */ public interface Component { /** * Adds a child to the component * * @param component the child to add */ public void add(Component component); /** * Removes a child from the component * * @param component the child to remove */ public void remove(Component component); /** * Returns a child of the component * * @param index the position of the child */ public Component getChild(int index); /** * Returns the number of chilren a component has * * @returns the number of children of this component */ public int getChildCount(); }
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