require_relative 'pattern1' module BrDocuments module IE class AM < Pattern1 def initialize(number) super @mask = /^(\d{2}\.\d{3}\.\d{3}\-\d{1})$|^(\d{9})$/ end private def format_ie(number) number.sub(/(\d{2})(\d{3})(\d{3})(\d{1})/, '\\1.\\2.\\3-\\4') end end end end