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module SPARQL; module Algebra
class Operator
##
# The SPARQL relational `=` (equal) comparison operator.
#
# @example
# (= ?x ?y)
#
# @see http://www.w3.org/TR/rdf-sparql-query/#OperatorMapping
# @see http://www.w3.org/TR/rdf-sparql-query/#func-RDFterm-equal
class Equal < Compare
NAME = :'='
##
# Returns `true` if the operands are equal; returns `false` otherwise.
#
# @param [RDF::Term] term1
# an RDF term
# @param [RDF::Term] term2
# an RDF term
# @return [RDF::Literal::Boolean] `true` or `false`
# @raise [TypeError] if either operand is not an RDF term or operands are not comperable
#
# @see {RDF::Term#==}
def apply(term1, term2)
term1 = term1.dup.extend(RDF::TypeCheck)
term2 = term2.dup.extend(RDF::TypeCheck)
RDF::Literal(term1 == term2)
end
end # Equal
end # Operator
end; end # SPARQL::Algebra
Version data entries
31 entries across 31 versions & 1 rubygems