hadoop 0.18 counter grammar

gistfile1.txt

# "a.b:1" => [["a", "b", 1]]
# "a.b:1,c.d:2" => [["a", "b", 1], ["c", "d", 2]]

grammar Hadoop18Counters

  rule counter_records
    counter_record ("," counter_record)* {
      def to_list
	items = elements[0].to_list
        if elements[1]
          elements[1].elements.each do |e|
            items << e.elements[1].to_list
          end
        end
        items
      end
    }
  end

  rule counter_record
    group:string "." name:string ":" count:int {
      def to_list
        [group.text_value, name.text_value, count.text_value.to_i]
      end
    }
  end

  rule string
    [^:\.]+
  end

  rule int
    [0-9]+
  end

end