class Rufus::CronLine

def initialize (line)
  super()
  @original = line
  items = line.split
  unless items.length == 5 or items.length == 6
    raise(
      "cron '#{line}' string should hold 5 or 6 items, not #{items.length}")
  end
  offset = items.length - 5
  @seconds = offset == 1 ? parse_item(items[0], 0, 59) : [ 0 ]
  @minutes = parse_item(items[0 + offset], 0, 59)
  @hours = parse_item(items[1 + offset], 0, 24)
  @days = parse_item(items[2 + offset], 1, 31)
  @months = parse_item(items[3 + offset], 1, 12)
  @weekdays = parse_weekdays(items[4 + offset])
end