class RDF::N3::Algebra::Log::ParsedAsN3

The subject string, parsed as N3, gives this formula.

Constants

NAME
URI

Public Instance Methods

resolve(resource, position: :subject) click to toggle source

Parses the subject into a new formula.

Returns nil if resource does not validate, given its position

@param [RDF::N3::List] resource @return [RDF::Term]

# File lib/rdf/n3/algebra/log/parsed_as_n3.rb, line 15
def resolve(resource, position: :subject)
  case position
  when :subject
    return nil unless resource.literal?
    begin
      repo = RDF::N3::Repository.new
      repo << RDF::N3::Reader.new(resource.to_s, **@options.merge(list_terms: true,  logger: false))
      log_debug("logParsedAsN3") {SXP::Generator.string repo.statements.to_sxp_bin}
      content_hash = resource.hash # used as name of resulting formula
      form = RDF::N3::Algebra::Formula.from_enumerable(repo, graph_name: RDF::Node.intern(content_hash))
      log_info(NAME) {"form hash (#{resource}): #{form.hash}"}
      form
    rescue RDF::ReaderError
      nil
    end
  when :object
    return nil unless resource.literal? || resource.is_a?(RDF::Query::Variable)
    resource
  end
end