class AwsRecord::Generators::SecondaryIndex

def get_option_value(raw_option)
  case raw_option
  when /hkey\{(\w+)\}/
    [:hash_key, ::Regexp.last_match(1)]
  when /rkey\{(\w+)\}/
    [:range_key, ::Regexp.last_match(1)]
  when /proj_type\{(\w+)\}/
    [:projection_type, ::Regexp.last_match(1)]
  else
    raise ArgumentError, "Invalid option for secondary index #{raw_option}"
  end
end