Sha256: 972fdd2bd5b1eac3f1cf89ded81ca619bba2f8f3349054c6ce6268a70cd449ed
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Contents
module RDF::N3::Algebra::Log
##
# The subject string, parsed as N3, gives this formula.
class ParsedAsN3 < RDF::N3::Algebra::ResourceOperator
NAME = :logParsedAsN3
URI = RDF::N3::Log.parsedAsN3
##
# 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]
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
end
end
Version data entries
4 entries across 4 versions & 1 rubygems