Sha256: ca81459423f676684c459f3c5f822463f19ad01d4a1f24f2a5bed60507229e1d
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Size: 965 Bytes
Versions: 4
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Stored size: 965 Bytes
Contents
module RDF::N3::Algebra::Log
##
# The subject formula, expressed as N3, gives this string.
class N3String < RDF::N3::Algebra::ResourceOperator
NAME = :logN3String
URI = RDF::N3::Log.n3String
##
# Serializes the subject formula into an N3 string representation.
#
# @param [RDF::N3::List] resource
# @return [RDF::Term]
def resolve(resource, position: :subject)
case position
when :subject
return nil unless resource.formula?
as_literal(RDF::N3::Writer.buffer {|w| resource.each {|st| w << st}})
when :object
return nil unless resource.literal? || resource.variable?
resource
end
end
##
# Subject must evaluate to a formula and object to a literal.
#
# @param [RDF::Term] subject
# @param [RDF::Term] object
# @return [Boolean]
def valid?(subject, object)
subject.formula? && (object.variable? || object.literal?)
end
end
end
Version data entries
4 entries across 4 versions & 1 rubygems