module RDF::TriG::StreamingWriter
Streaming writer interface @author [Gregg Kellogg](greggkellogg.net/)
Public Instance Methods
stream_epilogue()
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Complete open statements @return [void] `self`
# File lib/rdf/trig/streaming_writer.rb, line 38 def stream_epilogue case when @previous_statement.nil? ; when @streaming_graph then @output.puts " }" else @output.puts " ." end end
stream_statement(statement)
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Write out a statement, retaining current `subject` and `predicate` to create more compact output @return [void] `self`
# File lib/rdf/trig/streaming_writer.rb, line 10 def stream_statement(statement) if statement.graph_name != @streaming_graph stream_epilogue if statement.graph_name @output.write "#{format_term(statement.graph_name, **options)} {" end @streaming_graph, @streaming_subject, @streaming_predicate = statement.graph_name, statement.subject, statement.predicate @output.write "#{format_term(statement.subject, **options)} " @output.write "#{statement.predicate == RDF.type ? 'a' : format_term(statement.predicate, **options)} " elsif statement.subject != @streaming_subject @output.puts " ." if @previous_statement @output.write "#{indent(@streaming_subject ? 1 : 0)}" @streaming_subject, @streaming_predicate = statement.subject, statement.predicate @output.write "#{format_term(statement.subject, **options)} " @output.write "#{statement.predicate == RDF.type ? 'a' : format_term(statement.predicate, **options)} " elsif statement.predicate != @streaming_predicate @streaming_predicate = statement.predicate @output.write ";\n#{indent(@streaming_subject ? 2 : 1)}#{statement.predicate == RDF.type ? 'a' : format_term(statement.predicate, **options)} " else @output.write ",\n#{indent(@streaming_subject ? 3 : 2)}" end @output.write("#{format_term(statement.object, **options)}") @previous_statement = statement end