Sha256: d0c539f3a458fcdfddaf26062d97655625e962b0e9a585fb77a79b2efc9bc568
Contents?: true
Size: 1.05 KB
Versions: 28
Compression:
Stored size: 1.05 KB
Contents
require 'securerandom'
module SPARQL; module Algebra
class Operator
##
# The SPARQL `uuid` function.
#
# @example
# (prefix ((: <http://example.org/>)
# (xsd: <http://www.w3.org/2001/XMLSchema#>))
# (project (?length)
# (extend ((?length (strlen (str ?uuid))))
# (filter (&& (isIRI ?uuid) (regex (str ?uuid) "^urn:uuid:[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}$" "i"))
# (extend ((?uuid (uuid)))
# (bgp))))))
#
# @see http://www.w3.org/TR/sparql11-query/#func-uuid
class UUID < Operator::Nullary
include Evaluatable
NAME = :uuid
##
# Return a fresh IRI from the UUID URN scheme. Each call of UUID() returns a different UUID. It must not be the "nil" UUID (all zeroes). The variant and version of the UUID is implementation dependent.
#
# @return [RDF::URI]
def apply
RDF::URI("urn:uuid:#{SecureRandom.uuid}")
end
end # UUID
end # Operator
end; end # SPARQL::Algebra
Version data entries
28 entries across 28 versions & 1 rubygems