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module SPARQL; module Algebra class Operator ## # A SPARQL `contains` operator. # # @example # (strends ?x ?y) # # @see http://www.w3.org/TR/sparql11-query/#func-strends # @see http://www.w3.org/TR/xpath-functions/#func-ends-with class StrEnds < Operator::Binary include Evaluatable NAME = :strends ## # The STRENDS function corresponds to the XPath fn:ends-with function. The arguments must be argument compatible otherwise an error is raised. # # For such input pairs, the function returns true if the lexical form of arg1 ends with the lexical form of arg2, otherwise it returns false. # # @example # strEnds("foobar", "bar") #=> true # strEnds("foobar"@en, "bar"@en) #=> true # strEnds("foobar"^^xsd:string, "bar"^^xsd:string) #=> true # strEnds("foobar"^^xsd:string, "bar") #=> true # strEnds("foobar", "bar"^^xsd:string) #=> true # strEnds("foobar"@en, "bar") #=> true # strEnds("foobar"@en, "bar"^^xsd:string) #=> true # # @param [RDF::Literal] left # a literal # @param [RDF::Literal] right # a literal # @return [RDF::Literal::Boolean] # @raise [TypeError] if operands are not compatible def apply(left, right) case when !left.compatible?(right) raise TypeError, "expected two RDF::Literal operands, but got #{left.inspect} and #{right.inspect}" when left.to_s.end_with?(right.to_s) then RDF::Literal::TRUE else RDF::Literal::FALSE end end end # StrEnds end # Operator end; end # SPARQL::Algebra
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28 entries across 28 versions & 1 rubygems