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Types that extend and augment the Java Collections Framework.
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/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003-2004 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgement may appear in the software itself,
 *    if and wherever such third-party acknowledgements normally appear.
 *
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package org.apache.commons.collections.list;

import java.util.Collection;
import java.util.List;
import java.util.ListIterator;

import org.apache.commons.collections.collection.AbstractCollectionDecorator;

/**
 * Decorates another List to provide additional behaviour.
 * 
 * Methods are forwarded directly to the decorated list.
 *
 * @since Commons Collections 3.0
 * @version $Revision: 1.2 $ $Date: 2004/01/14 21:43:17 $
 * 
 * @author Stephen Colebourne
 */
public abstract class AbstractListDecorator extends AbstractCollectionDecorator implements List {

    /**
     * Constructor that wraps (not copies).
     * 
     * @param list  the list to decorate, must not be null
     * @throws IllegalArgumentException if list is null
     */
    protected AbstractListDecorator(List list) {
        super(list);
    }

    /**
     * Gets the list being decorated.
     * 
     * @return the decorated list
     */
    protected List getList() {
        return (List) getCollection();
    }

    //-----------------------------------------------------------------------
    public void add(int index, Object object) {
        getList().add(index, object);
    }

    public boolean addAll(int index, Collection coll) {
        return getList().addAll(index, coll);
    }

    public Object get(int index) {
        return getList().get(index);
    }

    public int indexOf(Object object) {
        return getList().indexOf(object);
    }

    public int lastIndexOf(Object object) {
        return getList().lastIndexOf(object);
    }

    public ListIterator listIterator() {
        return getList().listIterator();
    }

    public ListIterator listIterator(int index) {
        return getList().listIterator(index);
    }

    public Object remove(int index) {
        return getList().remove(index);
    }

    public Object set(int index, Object object) {
        return getList().set(index, object);
    }

    public List subList(int fromIndex, int toIndex) {
        return getList().subList(fromIndex, toIndex);
    }

}