Class: SPARQL::Algebra::Operator::StrDT

Inherits:
Binary show all
Includes:
Evaluatable
Defined in:
vendor/bundler/ruby/2.5.0/bundler/gems/sparql-683a29666c28/lib/sparql/algebra/operator/strdt.rb

Overview

The SPARQL strdt operator.

Examples:

(project (?s ?str1)
  (extend ((?str1 (strdt ?str xsd:string)))
    (filter (langMatches (lang ?str) "en")
      (bgp (triple ?s :str ?str))))))

See Also:

Constant Summary collapse

NAME = 
:strdt

Constants inherited from Binary

Binary::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

#evaluate, #memoize, #replace_aggregate!, #replace_vars!

Methods inherited from Binary

#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?, #evaluate, 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::Binary

Instance Method Details

#apply(value, datatypeIRI) ⇒ RDF::Literal

Constructs a literal with lexical form and type as specified by the arguments.

Parameters:

Returns:

Raises:

  • (TypeError)

See Also:



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# File 'vendor/bundler/ruby/2.5.0/bundler/gems/sparql-683a29666c28/lib/sparql/algebra/operator/strdt.rb', line 27

def apply(value, datatypeIRI)
  raise TypeError, "Literal #{value.inspect} is not simple" unless value.simple?
  RDF::Literal.new(value.to_s, datatype: datatypeIRI)
end