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module RDF::N3::Algebra::Log
##
# A function to merge formulae: logical AND.
#
# The subject is a list of formulae. The object, which can be generated, is a formula containing a copy of each of the formulae in the list on the left. A cwm built-in function.
class Conjunction < RDF::N3::Algebra::ListOperator
NAME = :logConjunction
URI = RDF::N3::Log.conjunction
##
# Evaluates this operator by creating a new formula containing the triples from each of the formulae in the list.
#
# @param [RDF::N3::List] list
# @return [RDF::N3::Algebra::Formula]
# @see RDF::N3::ListOperator#evaluate
def resolve(list)
form = RDF::N3::Algebra::Formula.new(graph_name: RDF::Node.intern(list.hash))
log_debug(NAME, "list hash") {form.graph_name}
list.each do |f|
form.operands.push(*f.operands)
end
form = form.dup
log_info(NAME, "result") {SXP::Generator.string form.to_sxp_bin}
form
end
##
# Return subject operand.
#
# @return [RDF::Term]
def input_operand
operands.first
end
end
end
Version data entries
4 entries across 4 versions & 1 rubygems