Class: SPARQL::Algebra::Operator::Asc

Inherits:
Unary show all
Includes:
Evaluatable
Defined in:
vendor/bundler/ruby/2.5.0/bundler/gems/sparql-bb59900f675b/lib/sparql/algebra/operator/asc.rb

Overview

The SPARQL ascending sort operator.

Examples:

(prefix ((foaf: <http://xmlns.com/foaf/0.1/>))
  (project (?name)
    (order ((asc ?name))
      (bgp (triple ?x foaf:name ?name)))))

See Also:

Direct Known Subclasses

Desc

Constant Summary

NAME =
:asc

Constants inherited from Unary

Unary::ARITY

Constants inherited from SPARQL::Algebra::Operator

ARITY, IsURI, URI

Instance Attribute Summary

Attributes inherited from SPARQL::Algebra::Operator

#operands

Instance Method Summary collapse

Methods included from Evaluatable

#apply, #memoize, #replace_aggregate!, #replace_vars!

Methods inherited from Unary

#initialize

Methods inherited from SPARQL::Algebra::Operator

#aggregate?, arity, #base_uri, base_uri, base_uri=, #boolean, #constant?, #each_descendant, #eql?, #evaluatable?, evaluate, #executable?, #first_ancestor, for, #initialize, #inspect, #ndvars, #node?, #operand, #optimize, #parent, #parent=, prefixes, #prefixes, prefixes=, #rewrite, #to_binary, #to_sxp, #to_sxp_bin, #validate!, #variable?, #vars

Methods included from Expression

cast, #constant?, extension, extensions, for, #invalid?, new, #node?, open, #optimize, parse, register_extension, #to_sxp_bin, #valid?, #validate!, #variable?

Constructor Details

This class inherits a constructor from SPARQL::Algebra::Operator::Unary

Instance Method Details

#evaluate(bindings, options = {}) ⇒ RDF::Term

Returns the evaluation of its operand. Default comparison is in ascending order. Ordering is applied in Order.

Parameters:

  • bindings (RDF::Query::Solution)

    a query solution containing zero or more variable bindings

  • options (Hash{Symbol => Object}) (defaults to: {})

    ({}) options passed from query

Returns:



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# File 'vendor/bundler/ruby/2.5.0/bundler/gems/sparql-bb59900f675b/lib/sparql/algebra/operator/asc.rb', line 27

def evaluate(bindings, options = {})
  operand(0).evaluate(bindings, options.merge(depth: options[:depth].to_i + 1))
end