/*
 *  PHEX - The pure-java Gnutella-servent.
 *  Copyright (C) 2001 - 2005 Phex Development Group
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Created on 13.06.2004
 *  --- CVS Information ---
 *  $Id: FWSortableTableModel.java,v 1.2 2005/10/03 00:18:25 gregork Exp $
 */
package phex.gui.common.table;

import java.util.Comparator;

/**
 * 
 * @author gkoukkoullis
 */
public abstract class FWSortableTableModel extends FWTableModel
{
    /**
     * Creates a new FWSortableTableModel.
     */
    public FWSortableTableModel( String[] theTableColumns, Class[] theTableClasses )
    {
        super( theTableColumns, theTableClasses );
    }
    
    /**
     * Returns the most comparator that is used for sorting of the cell values
     * in the column. This is used by the FWSortedTableModel to perform the
     * sorting. If not overwritten the method returns null causing the
     * FWSortedTableModel to use a NaturalComparator. It expects all Objects that
     * are returned from getComparableValueAt() to implement the Comparable interface.
     *
     */
    public Comparator getColumnComparator( int column )
    {
        return null;
    }
    
    /**
     * Returns an attribute value that is used for comparing on sorting
     * for the cell at row and column. If not overwritten the call is forwarded
     * to getValueAt().
     * The returned Object is compared via the Comparator returned from
     * getColumnComparator(). If no comparator is specified the returned Object
     * must implement the Comparable interface.
     */
    public Object getComparableValueAt( int row, int column )
    {
        return getValueAt( row, column );
    }
}
