package ca.ubc.cs.spl.aspectPatterns.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.aspectPatterns.
*
* For more details and the latest version of this code, please see:
* http://www.cs.ubc.ca/labs/spl/projects/aodps.html
*
* 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 1.1, 02/12/04
*/
public class OpenList implements SimpleList {
java.util.LinkedList list = new java.util.LinkedList();
/**
* Returns the number of elements in the list
*
* @return the number of elements in the list
*/
public int count() {
return list.size();
}
/**
* Appends an object to the list. Since this is an open list, inserting
* elements is assumed to succeed.
*
* @param o the object to append
* @return 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
* @return 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
* @return the object at the specified index
*/
public Object get(int index) {
return list.get(index);
}
/**
* Returns a reverse iterator for this list.
*
* @return the a reverse iterator for this list
*/
public Iterator createReverseIterator() {
return new ReverseIterator(this);
}
}