Class: BEL::Extension::Format::RDFReader::UnbufferedEvidenceYielder

Inherits:
Object
  • Object
show all
Includes:
EvidenceYielder
Defined in:
lib/bel/extensions/rdf/rdf.rb

Constant Summary

Constants included from EvidenceYielder

EvidenceYielder::BELV, EvidenceYielder::RDF, EvidenceYielder::RDFS

Constants included from Quoting

Quoting::KeywordMatcher, Quoting::NonWordMatcher

Instance Method Summary collapse

Methods included from EvidenceYielder

#describe, #evidence_yielder, #make_evidence, #resources_of_type

Methods included from Quoting

#always_quote, #ensure_quotes, #quotes_required?, #remove_quotes

Constructor Details

#initialize(data, format = :ntriples) ⇒ UnbufferedEvidenceYielder

Returns a new instance of UnbufferedEvidenceYielder.



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# File 'lib/bel/extensions/rdf/rdf.rb', line 491

def initialize(data, format = :ntriples)
  @data   = data
  @format = format
end

Instance Method Details

#each ⇒ Object 



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# File 'lib/bel/extensions/rdf/rdf.rb', line 496

def each
  if block_given?
    graph             = RUBYRDF::Graph.new
    evidence_resource = nil
    RUBYRDF::Reader.for(@format).new(@data) do |reader|
      reader.each_statement do |statement|
        case
        when statement.object == BELV.Evidence &&
             statement.predicate == RDF.type
          evidence_resource = statement.subject
        when evidence_resource &&
             statement.predicate != BELV.hasEvidence &&
             statement.subject != evidence_resource

          # yield current graph as evidence model
          yield make_evidence(
            describe(evidence_resource, graph),
            graph
          )

          # reset parse state
          graph.clear
          evidence_resource = nil

          # insert this RDF statement
          graph << statement
        else
          graph << statement
        end
      end
    end

    # yield last graph as evidence model
    yield make_evidence(
      describe(evidence_resource, graph),
      graph
    )
  else
    to_enum(:each)
  end
end