class FDB::TransactionRead

def get_range(bkeysel, ekeysel, options={}, &block)
  defaults = { :limit => 0, :reverse => false, :streaming_mode => :iterator }
  options = defaults.merge options
  bsel = to_selector bkeysel
  esel = to_selector ekeysel
  if options[:streaming_mode].kind_of? Symbol
    streaming_mode = @@StreamingMode[options[:streaming_mode].to_s.upcase]
    raise ArgumentError, "#{options[:streaming_mode]} is not a valid streaming mode" if !streaming_mode
    streaming_mode = streaming_mode[0]
  else
    streaming_mode = options[:streaming_mode]
  end
  r = @@RangeEnum.new(lambda {|bsel, esel, limit, streaming_mode, iteration, reverse|
                        begin_key = FDB.key_to_bytes(bsel.key)
                        end_key = FDB.key_to_bytes(esel.key)
                        FDB::FutureKeyValueArray.new(FDBC.fdb_transaction_get_range(@tpointer, begin_key, begin_key.bytesize, bsel.or_equal, bsel.offset, end_key, end_key.bytesize, esel.or_equal, esel.offset, limit, 0, streaming_mode, iteration, @is_snapshot, reverse))
                      }, bsel, esel, options[:limit], options[:reverse] ? 1 : 0, streaming_mode)
  if !block_given?
    r
  else
    r.each &block
  end
end