Class: PlainBufferCodedOutputStream

Inherits:
Object
  • Object
show all
Defined in:
lib/tablestore/plain_buffer_coded_output_stream.rb

Instance Method Summary collapse

Constructor Details

#initialize(output_stream) ⇒ PlainBufferCodedOutputStream

Returns a new instance of PlainBufferCodedOutputStream.



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 7

def initialize(output_stream)
  @output_stream = output_stream
end

Instance Method Details

#crc_int8(row_checksum, data) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 243

def crc_int8(row_checksum, data)
  PlainBufferCrc8.crc_int8(row_checksum, data)
end

#write_cell_name(name, cell_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 19

def write_cell_name(name, cell_check_sum)
  write_tag(TAG_CELL_NAME)
  @output_stream.write_raw_little_endian32(name.length)
  @output_stream.write_bytes(name)
  cell_check_sum = PlainBufferCrc8.crc_string(cell_check_sum, name)
  cell_check_sum
end

#write_column(column_name, column_value, timestamp, row_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 137

def write_column(column_name, column_value, timestamp, row_check_sum)
  cell_check_sum = 0
  write_tag(TAG_CELL)
  cell_check_sum = write_cell_name(column_name, cell_check_sum)
  cell_check_sum = write_column_value_with_checksum(column_value, cell_check_sum)

  if timestamp
    write_tag(TAG_CELL_TIMESTAMP)
    @output_stream.write_raw_little_endian64(timestamp)
    cell_check_sum = PlainBufferCrc8.crc_int64(cell_check_sum, timestamp)
  end
  write_tag(TAG_CELL_CHECKSUM)
  @output_stream.write_raw_byte(cell_check_sum)
  PlainBufferCrc8.crc_int8(row_check_sum, cell_check_sum)
end

#write_column_value(value) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 108

def write_column_value(value)
  if value.is_a?(TrueClass) || value.is_a?(FalseClass)
    @output_stream.write_raw_byte(VT_BOOLEAN)
  elsif value.is_a?(Fixnum)
    @output_stream.write_raw_byte(VT_INTEGER)
    @output_stream.write_raw_little_endian64(value)
  elsif value.is_a?(String)
    @output_stream.write_raw_byte(VT_STRING)
    @output_stream.write_raw_little_endian32(value.bytes.length)
    @output_stream.write_bytes(value)
  elsif value.is_a?(Float)
    @output_stream.write_raw_byte(VT_DOUBLE)
    @output_stream.write_double(value)
  else
    raise TableStoreClientError.new("Unsupported column type: #{value.class}")
  end
end

#write_column_value_with_checksum(value, cell_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 64

def write_column_value_with_checksum(value, cell_check_sum)
  write_tag(TAG_CELL_VALUE)
  if value.is_a?(TrueClass) || value.is_a?(FalseClass)
    @output_stream.write_raw_little_endian32(2)
    @output_stream.write_raw_byte(VT_BOOLEAN)
    @output_stream.write_boolean(value)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_BOOLEAN)
    if value
      cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, 1)
    else
      cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, 0)
    end
  elsif value.is_a?(Fixnum)
    @output_stream.write_raw_little_endian32(1 + LITTLE_ENDIAN_64_SIZE)
    @output_stream.write_raw_byte(VT_INTEGER)
    @output_stream.write_raw_little_endian64(value)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_INTEGER)
    cell_check_sum = PlainBufferCrc8.crc_int64(cell_check_sum, value)
  elsif value.is_a?(String)
    prefix_length = LITTLE_ENDIAN_32_SIZE + 1
    @output_stream.write_raw_little_endian32(prefix_length + value.bytes.length)
    @output_stream.write_raw_byte(VT_STRING)
    @output_stream.write_raw_little_endian32(value.bytes.length)
    @output_stream.write_bytes(value)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_STRING)
    cell_check_sum = PlainBufferCrc8.crc_int32(cell_check_sum, value.bytes.length)
    cell_check_sum = PlainBufferCrc8.crc_string(cell_check_sum, value)
  elsif value.is_a?(Float)
    if SYS_BITS == 64
      double_in_long, = [value].pack("d").unpack("q")
    else
      double_in_long, = [value].pack("d").unpack("l")
    end
    @output_stream.write_raw_little_endian32(1 + LITTLE_ENDIAN_64_SIZE)
    @output_stream.write_raw_byte(VT_DOUBLE)
    @output_stream.write_double(value)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_DOUBLE)
    cell_check_sum = PlainBufferCrc8.crc_int64(cell_check_sum, double_in_long)
  else
    raise TableStoreClientError.new("Unsupported column type: #{value.class}")
  end
  cell_check_sum
end

#write_columns(columns, row_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 198

def write_columns(columns, row_check_sum)
  if columns and columns.length != 0
    write_tag(TAG_ROW_DATA)
    columns.each do |column|
      if column.length == 2
        row_check_sum = write_column(column[0], column[1], nil, row_check_sum)
      elsif column.length == 3
        row_check_sum = write_column(column[0], column[1], column[2], row_check_sum)
      end
    end
    row_check_sum
  end
end

#write_delete_marker(row_checksum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 233

def write_delete_marker(row_checksum)
  write_tag(TAG_DELETE_ROW_MARKER)
  PlainBufferCrc8.crc_int8(row_checksum, 1)
end

#write_header ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 11

def write_header
  @output_stream.write_raw_little_endian32(HEADER)
end

#write_primary_key(primary_key, row_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 190

def write_primary_key(primary_key, row_check_sum)
  write_tag(TAG_ROW_PK)
  primary_key.each do |pk|
    row_check_sum = write_primary_key_column(pk[0], pk[1], row_check_sum)
  end
  row_check_sum
end

#write_primary_key_column(pk_name, pk_value, row_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 126

def write_primary_key_column(pk_name, pk_value, row_check_sum)
  cell_check_sum = 0
  write_tag(TAG_CELL)
  cell_check_sum = write_cell_name(pk_name, cell_check_sum)
  cell_check_sum = write_primary_key_value(pk_value, cell_check_sum)
  write_tag(TAG_CELL_CHECKSUM)
  @output_stream.write_raw_byte(cell_check_sum)
  row_check_sum = PlainBufferCrc8.crc_int8(row_check_sum, cell_check_sum)
  row_check_sum
end

#write_primary_key_value(value, cell_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 27

def write_primary_key_value(value, cell_check_sum)
  write_tag(TAG_CELL_VALUE)
  value = value.to_s.split("::").last if [Metadata::INF_MAX, Metadata::INF_MIN, Metadata::PK_AUTO_INCR].include?value
  if value == "INF_MIN"
    @output_stream.write_raw_little_endian32(1)
    @output_stream.write_raw_byte(VT_INF_MIN)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_INF_MIN)
  elsif value == "INF_MAX"
    @output_stream.write_raw_little_endian32(1)
    @output_stream.write_raw_byte(VT_INF_MAX)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_INF_MAX)
  elsif value == "PK_AUTO_INCR"
    @output_stream.write_raw_little_endian32(1)
    @output_stream.write_raw_byte(VT_AUTO_INCREMENT)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_AUTO_INCREMENT)
  elsif value.is_a?(Fixnum)
    @output_stream.write_raw_little_endian32(1 + LITTLE_ENDIAN_64_SIZE)
    @output_stream.write_raw_byte(VT_INTEGER)
    @output_stream.write_raw_little_endian64(value)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_INTEGER)
    cell_check_sum = PlainBufferCrc8.crc_int64(cell_check_sum, value)
  elsif value.is_a?(String)
    prefix_length = LITTLE_ENDIAN_32_SIZE + 1
    @output_stream.write_raw_little_endian32(prefix_length + value.bytes.length)
    @output_stream.write_raw_byte(VT_STRING)
    @output_stream.write_raw_little_endian32(value.length)
    @output_stream.write_bytes(value)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, VT_STRING)
    cell_check_sum = PlainBufferCrc8.crc_int32(cell_check_sum, value.bytes.length)
    cell_check_sum = PlainBufferCrc8.crc_string(cell_check_sum, value)
  # elsif value.is_a?()
  else
    raise TableStoreClientError.new("Unsupported primary key type: #{value.class}")
  end
  cell_check_sum
end

#write_row_checksum(row_checksum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 238

def write_row_checksum(row_checksum)
  write_tag(TAG_ROW_CHECKSUM)
  @output_stream.write_raw_byte(row_checksum)
end

#write_tag(tag) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 15

def write_tag(tag)
  @output_stream.write_raw_byte(tag)
end

#write_update_column(update_type, column_name, column_value, row_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 153

def write_update_column(update_type, column_name, column_value, row_check_sum)
  update_type = update_type.upcase
  cell_check_sum = 0
  write_tag(TAG_CELL)
  cell_check_sum = write_cell_name(column_name, cell_check_sum)
  timestamp = nil
  if column_value
    if column_value.is_a?(Array)
      unless column_value[0].nil?
        cell_check_sum = write_column_value_with_checksum(column_value[0], cell_check_sum)
      end
      unless column_value[1].nil?
        timestamp = column_value[1]
      end
    else
      cell_check_sum = write_column_value_with_checksum(column_value, cell_check_sum)
    end
  end
  if update_type == "DELETE"
    write_tag(TAG_CELL_TYPE)
    @output_stream.write_raw_byte(DELETE_ONE_VERSION)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, DELETE_ONE_VERSION)
  elsif update_type == "DELETE_ALL"
    write_tag(TAG_CELL_TYPE)
    @output_stream.write_raw_byte(DELETE_ALL_VERSION)
    cell_check_sum = PlainBufferCrc8.crc_int8(cell_check_sum, DELETE_ALL_VERSION)
  end
  if timestamp
    write_tag(TAG_CELL_TIMESTAMP)
    @output_stream.write_raw_little_endian64(timestamp)
    cell_check_sum = PlainBufferCrc8.crc_int64(cell_check_sum, timestamp)
  end
  write_tag(TAG_CELL_CHECKSUM)
  @output_stream.write_raw_byte(cell_check_sum)
  PlainBufferCrc8.crc_int8(row_check_sum, cell_check_sum)
end

#write_update_columns(attribute_columns, row_check_sum) ⇒ Object 



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# File 'lib/tablestore/plain_buffer_coded_output_stream.rb', line 212

def write_update_columns( attribute_columns, row_check_sum)
  if attribute_columns.length != 0
    write_tag(TAG_ROW_DATA)
    attribute_columns.keys.each do |update_type|
      columns = attribute_columns[update_type]
      columns.each do |column|
        if column.is_a?(String)
          row_check_sum = write_update_column(update_type, column, nil, row_check_sum)
        elsif column.length == 2
          row_check_sum = write_update_column(update_type, column[0], [column[1], nil], row_check_sum)
        elsif column.length == 3
          row_check_sum = write_update_column(update_type, column[0], [column[1], column[2]], row_check_sum)
        else
          raise TableStoreClientError.new("Unsupported column format: #{column.to_s}")
        end
      end
    end
  end
  row_check_sum
end