module RDF::Turtle::StreamingWriter

Streaming writer interface @author [Gregg Kellogg](greggkellogg.net/)

Public Instance Methods

stream_epilogue() click to toggle source

Complete open statements @return [void] ‘self`

# File lib/rdf/turtle/streaming_writer.rb, line 45
def stream_epilogue
  @output.puts ' .' if @streaming_subject
end
stream_prologue() click to toggle source

Write out declarations @return [void] ‘self`

# File lib/rdf/turtle/streaming_writer.rb, line 11
def stream_prologue
  if @options[:standard_prefixes]
    RDF::Vocabulary.each do |vocab|
      pfx = vocab.__name__.to_s.split('::').last.downcase
      prefix(pfx, vocab.to_uri)
    end
  end
  preprocess
  start_document
  @output.puts ""
end
stream_statement(statement) click to toggle source

Write out a statement, retaining current ‘subject` and `predicate` to create more compact output @return [void] `self`

# File lib/rdf/turtle/streaming_writer.rb, line 27
def stream_statement(statement)
  if statement.subject != @streaming_subject
    @output.puts ' .' if @streaming_subject
    @streaming_subject, @streaming_predicate = statement.subject, statement.predicate
    @output.write "#{format_term(statement.subject, **options)} "
    @output.write "#{format_term(statement.predicate, **options)} "
  elsif statement.predicate != @streaming_predicate
    @streaming_predicate = statement.predicate
    @output.write ";\n#{indent(1)}#{format_term(statement.predicate, **options)} "
  else
    @output.write ",\n#{indent(2)}"
  end
  @output.write("#{format_term(statement.object, **options)}")
end