content: //  Copyright 2006, Clark N. Hobbie
  //
  //  This file is part of the util library.
  //
  //  The util library is free software; you can redistribute it and/or modify it
  //  under the terms of the Lesser GNU General Public License as published by
  //  the Free Software Foundation; either version 2.1 of the License, or (at
  //  your option) any later version.
  //
  //  The util library 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 Lesser GNU General Public
  //  License for more details.
  //
  //  You should have received a copy of the Lesser GNU General Public License
  //  along with the util library; if not, write to the Free Software Foundation,
  //  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  //
  /*
   * Copyright (c) Long Term Software, LLC. All rights reserved.
   */
  package com.lts.swing.table;
  
  import java.util.Iterator;
  import java.util.List;
  
  import javax.swing.table.DefaultTableModel;
  
  /**
   * A DefaultTableModel that always has a blank row.
   * 
   * <H2>Abstract Class</H2>
   * Subclasses must define the following methods to be instantiateable:
   * <UL>
   * <LI>createEmptyRow - create a blank row of data.
   * </UL>
   * 
   * <P>
   * Whenever something in the blank row is set in such a way to make the row
   * non-empty, a new row is created and added to the table.
   * 
   * @author cnh
   */
  public abstract class GrowableTableModel 
  	extends DefaultTableModel 
  {
  	public abstract Object[] createEmptyRow();
  	
  	public GrowableTableModel (String[] columnNames, int rows)
  	{
  		super(columnNames, rows);
  	}
  	
  	public GrowableTableModel (String[] columnNames)
  	{
  		super (columnNames, 1);
  	}
  	
  	public GrowableTableModel (String[] columnNames, List rows)
  	{
  		super(columnNames, 0);
  		addRows(rows);
  		addRow(createEmptyRow());
  	}	
  	
  
  	public void setValueAt (Object o, int row, int col)
  	{
  		super.setValueAt(o,row,col);
  		
  		int rowCount = getRowCount();
  		if (row >= (rowCount - 1))
  		{
  			addRow(createEmptyRow());
  		}
  	}
  	
  	public void addRows(List rows)
  	{
  		for (Iterator i = rows.iterator(); i.hasNext();)
  		{
  			Object[] row = (Object[]) i.next();
  			addRow(row);
  		}
  	}
  }
  