ruby/red-arrow/lib/arrow/table-table-formatter.rb

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#   http://www.apache.org/licenses/LICENSE-2.0
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require "time"

module Arrow
  # TODO: Almost codes should be implemented in Apache Arrow C++.
  class TableTableFormatter < TableFormatter
    private
    def format_header(text, column_formatters)
      column_formatters.each do |column_formatter|
        text << "\t"
        text << column_formatter.aligned_name
      end
      text << "\n"
    end

    def format_rows(text, column_formatters, rows, n_digits, start_offset)
      rows.each_with_index do |row, nth_row|
        text << ("%*d" % [n_digits, start_offset + nth_row])
        row.each_with_index do |column_value, nth_column|
          text << "\t"
          column_formatter = column_formatters[nth_column]
          aligned_name = column_formatter.aligned_name
          text << column_formatter.format_value(column_value, aligned_name.size)
        end
        text << "\n"
      end
    end

    def format_ellipsis(text)
      text << "...\n"
    end
  end
end