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Wed Mar 24 16:00:00 GMT 2004
OpenList
package examples.iterator.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): */ import java.util.Iterator; /** * Implements a basic open list. This implementation is based on * <code>java.util.LinkedList</code>. In essence, this class acts as an * adapter for the Java class. * * @author Jan Hannemann * @author Gregor Kiczales * @version 1.0, 07/13/02 * * @see SimpleList */ public class OpenList implements SimpleList { java.util.LinkedList list = new java.util.LinkedList(); /** * Returns the number of elements in the list * * @returns the number of elements in the list */ public int count() { return list.size(); } /** * Appends an object to the list * * @param o the object to append * @returns true if successful, false otherwise */ public boolean append(Object o) { list.addLast(o); return true; } /** * Removes an object from the list * * @param o the object to remove * @returns true if successful, false otherwise */ public boolean remove(Object o) { return list.remove(o); } /** * Returns an object from the list * * @param index the position of the object * @returns the object at position index */ public Object get(int index) { return list.get(index); } /** * Returns a reverse iterator for this list. * * @returns the a reverse iterator for this list */ public Iterator createReverseIterator() { return new ReverseIterator(this); } }
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