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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * SableUtil, a clean room implementation of the Collection API.     *
 * Copyright (C) 1997, 1998 Etienne Gagnon (gagnon@sable.mcgill.ca). *
 * All rights reserved.                                              *
 *                                                                   *
 * This work was done as a project of the Sable Research Group,      *
 * School of Computer Science, McGill University, Canada             *
 * (http://www.sable.mcgill.ca/).  It is understood that any         *
 * modification not identified as such is not covered by the         *
 * preceding statement.                                              *
 *                                                                   *
 * This work is free software; you can redistribute it and/or        *
 * modify it under the terms of the GNU Library General Public       *
 * License as published by the Free Software Foundation; either      *
 * version 2 of the License, or (at your option) any later version.  *
 *                                                                   *
 * This work is distributed in the hope that it will be useful,      *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of    *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU *
 * Library General Public License for more details.                  *
 *                                                                   *
 * You should have received a copy of the GNU Library General Public *
 * License along with this library; if not, write to the             *
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,      *
 * Boston, MA  02111-1307, USA.                                      *
 *                                                                   *
 * To submit a bug report, send a comment, or get the latest news on *
 * this project and other Sable Research Group projects, please      *
 * visit the web site: http://www.sable.mcgill.ca/                   *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 Reference Version
 -----------------
 This is the latest official version on which this file is based.
 The reference version is: $SableUtilVersion: 1.11 $

 Change History
 --------------
 A) Notes:

 Please use the following template.  Most recent changes should
 appear at the top of the list.

 - Modified on [date (March 1, 1900)] by [name]. [(*) if appropriate]
   [description of modification].

 Any Modification flagged with "(*)" was done as a project of the
 Sable Research Group, School of Computer Science,
 McGill University, Canada (http://www.sable.mcgill.ca/).

 You should add your copyright, using the following template, at
 the top of this file, along with other copyrights.

 *                                                                   *
 * Modifications by [name] are                                       *
 * Copyright (C) [year(s)] [your name (or company)].  All rights     *
 * reserved.                                                         *
 *                                                                   *

 B) Changes:

 - Modified on June 7, 1998 by Etienne Gagnon (gagnon@sable.mcgill.ca). (*)
   Changed the license.
*/

package ca.mcgill.sable.util;

public abstract class AbstractSequentialList extends AbstractList
{
    public Object get(int index)
    {
        ListIterator i = listIterator(index);
        return i.next();
    }

    public Object set(int index, Object element)
    {
        ListIterator i = listIterator(index);
        Object old = i.next();
        i.set(element);
        return old;
    }

    public void add(int index, Object element)
    {
        ListIterator i = listIterator(index);
        i.add(element);
    }

    public Object remove(int index)
    {
        ListIterator i = listIterator(index);
        Object old = i.next();
        i.remove();
        return old;
    }

    public void removeRange(int fromIndex, int toIndex)
    {
        int size = size();

        if(fromIndex < 0 || fromIndex >= size || toIndex > size || toIndex < fromIndex)
        {
            throw new ArrayIndexOutOfBoundsException();
        }

        ListIterator i = listIterator(fromIndex);
        int count = toIndex - fromIndex;

        for(int j = 0; j < count; j++)
        {
            i.next();
            i.remove();
        }
    }

    public boolean addAll(int index, Collection c)
    {
        boolean modified = false;

        ListIterator i = listIterator(index);

        for(Iterator j = c.iterator(); j.hasNext();)
        {
            i.add(j.next());
            i.next();
            modified = true;
        }

        return modified;
    }

    public abstract ListIterator listIterator(int index);
}