to_s (DataObjects::URI)

    # File lib/data_objects/uri.rb, line 25
        def to_s
          string = ""
          string << "#{scheme}://"   if scheme
          if user
            string << "#{user}"
            string << ":#{password}" if password
            string << "@"
          end
          string << "#{host}"        if host
          string << ":#{port}"       if port
          string << path.to_s
          if query
            string << "?" << query.map do |key, value|
              "#{key}=#{value}"
            end.join("&")
          end
          string << "##{fragment}"   if fragment
          string
        end