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Contents
module SPARQL; module Algebra class Operator ## # The SPARQL Table operator. # # This is used to provide inline values. Each row becomes # a solution. # # @example # (table (vars ?book ?title) # (row (?title "SPARQL Tutorial")) # (row (?book :book2))) # # @see http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#inline-data class Table < Operator include Query NAME = [:table] ## # Returns solutions for each row # # @param [RDF::Queryable] queryable # the graph or repository to query # @param [Hash{Symbol => Object}] options # any additional keyword options # @yield [solution] # each matching solution # @yieldparam [RDF::Query::Solution] solution # @yieldreturn [void] ignored # @return [RDF::Query::Solutions] # the resulting solution sequence # @see http://www.w3.org/TR/rdf-sparql-query/#sparqlAlgebra def execute(queryable, options = {}, &block) @solutions = RDF::Query::Solutions() operands[1..-1].each do |row| next unless row.is_a?(Array) bindings = row[1..-1].inject({}) do |memo, (var, value)| memo[var.to_sym] = value memo end @solutions << RDF::Query::Solution.new(bindings) end @solutions.each(&block) if block_given? @solutions end end # Table end # Operator end; end # SPARQL::Algebra
Version data entries
3 entries across 3 versions & 1 rubygems
Version | Path |
---|---|
sparql-1.1.3 | lib/sparql/algebra/operator/table.rb |
sparql-1.1.2.1 | lib/sparql/algebra/operator/table.rb |
sparql-1.1.2 | lib/sparql/algebra/operator/table.rb |