Class: RDF::N3::Algebra::Str::GreaterThan

Inherits:
ResourceOperator
  • Object
show all
Defined in:
lib/rdf/n3/algebra/str/greater_than.rb

Overview

True iff the string is greater than the object when ordered according to Unicode(tm) code order.

Direct Known Subclasses

NotGreaterThan

Constant Summary collapse

NAME = 
:strGreaterThan
URI = 
RDF::N3::Str.greaterThan

Instance Attribute Summary

Attributes included from Enumerable

#existentials, #universals

Instance Method Summary collapse

Methods inherited from ResourceOperator

#as_literal, #execute, #valid?

Methods included from Builtin

#each, #evaluate, #hash, #rank, #to_uri

Instance Method Details

#apply(left, right) ⇒ RDF::Literal::Boolean

Parameters:

Returns:

  • (RDF::Literal::Boolean) 


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# File 'lib/rdf/n3/algebra/str/greater_than.rb', line 29

def apply(left, right)
  case
  when !left.is_a?(RDF::Term) || !right.is_a?(RDF::Term) || !left.compatible?(right)
    log_error(NAME) {"expected two RDF::Literal operands, but got #{left.inspect} and #{right.inspect}"}
  when left > right then RDF::Literal::TRUE
  else RDF::Literal::FALSE
  end
end

#input_operand ⇒ Object

Both subject and object are inputs.



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# File 'lib/rdf/n3/algebra/str/greater_than.rb', line 19

def input_operand
  RDF::N3::List.new(values: operands)
end

#resolve(resource, position:) ⇒ RDF::Term

The string:greaterThan compares subject with object as strings.

Parameters:

  • resource (RDF::Term)
  • position (:subject, :object)

Returns:

See Also:

  • ResourceOperator#evaluate


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# File 'lib/rdf/n3/algebra/str/greater_than.rb', line 14

def resolve(resource, position:)
  resource if resource.literal?
end