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require 'uri'
module SPARQL; module Algebra
class Operator
##
# The SPARQL logical `abs` operator.
#
# @example
# (encode_for_uri ?x)
#
# @see http://www.w3.org/TR/sparql11-query/#func-encode
# @see http://www.w3.org/TR/xpath-functions/#func-abs
class EncodeForURI < Operator::Unary
include Evaluatable
NAME = :encode_for_uri
##
# The `ENCODE_FOR_URI` function corresponds to the XPath fn:encode-for-uri function. It returns a simple literal with the lexical form obtained from the lexical form of its input after translating reserved characters according to the fn:encode-for-uri function.
#
# @example
# encode_for_uri("Los Angeles") "Los%20Angeles"
# encode_for_uri("Los Angeles"@en) "Los%20Angeles"
# encode_for_uri("Los Angeles"^^xsd:string) "Los%20Angeles"
#
# @param [RDF::Literal] operand
# the operand
# @return [RDF::Literal] literal of same type
# @raise [TypeError] if the operand is not a literal value
def apply(operand)
case operand
when RDF::Literal then RDF::Literal(::URI.encode(operand.to_s))
else raise TypeError, "expected an RDF::Literal, but got #{operand.inspect}"
end
end
end # EncodeForURI
end # Operator
end; end # SPARQL::Algebra
Version data entries
10 entries across 10 versions & 1 rubygems