Class: ArrowFormat::FileWriter

Inherits:
StreamingWriter show all
Defined in:
lib/arrow-format/file-writer.rb

Constant Summary collapse

MAGIC = 
"ARROW1".b
MAGIC_PADDING = 
"\x00\x00"

Constants inherited from StreamingWriter

StreamingWriter::ALIGNMENT_SIZE, StreamingWriter::CONTINUATION, StreamingWriter::EOS, StreamingWriter::METADATA_LARGEST_PADDING

Constants included from BufferAlignable

BufferAlignable::BUFFER_ALIGNMENT_SIZE

Instance Method Summary collapse

Methods inherited from StreamingWriter

#initialize, #write_record_batch

Constructor Details

This class inherits a constructor from ArrowFormat::StreamingWriter

Instance Method Details

#finish(metadata = nil) ⇒ Object 



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# File 'lib/arrow-format/file-writer.rb', line 32

def finish(metadata=nil)
  super()
  write_footer(metadata)
  write_data(MAGIC)
  @output
end

#start(schema) ⇒ Object 



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# File 'lib/arrow-format/file-writer.rb', line 25

def start(schema)
  @fb_schema = schema.to_flatbuffers
  write_data(MAGIC)
  write_data(MAGIC_PADDING)
  super
end