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Contents
module SPARQL; module Algebra
class Operator
##
# The SPARQL GraphPattern `prefix` operator.
#
# @example
# (prefix ((: <http://example/>))
# (graph ?g
# (bgp (triple ?s ?p ?o))))
#
# @see http://www.w3.org/TR/rdf-sparql-query/#QSynIRI
class Prefix < Binary
include Query
NAME = [:prefix]
##
# Executes this query on the given `queryable` graph or repository.
# Really a pass-through, as this is a syntactic object used for providing
# context for URIs.
#
# @param [RDF::Queryable] queryable
# the graph or repository to query
# @param [Hash{Symbol => Object}] options
# any additional keyword options
# @return [RDF::Query::Solutions]
# the resulting solution sequence
# @see http://www.w3.org/TR/rdf-sparql-query/#sparqlAlgebra
def execute(queryable, options = {})
@solutions = operands.last.execute(queryable, options.merge(:depth => options[:depth].to_i + 1))
end
##
# Returns an optimized version of this query.
#
# If optimize operands, and if the first two operands are both Queries, replace
# with the unique sum of the query elements
#
# @return [Union, RDF::Query] `self`
def optimize
operands.last.optimize
end
end # Prefix
end # Operator
end; end # SPARQL::Algebra
Version data entries
10 entries across 10 versions & 1 rubygems