@SuppressWarnings({ "unchecked", "rawtypes" })
	@Override
	public Class getColumnClass(int col)
	{
		switch (col)
		{
		case 0:
			return Boolean.class;
		case 1:
			return String.class;
		case 2:
		case 3:
			return Double.class;
		}
		return null;
	}