Class: RDF::N3::Algebra::Str::StartsWith

Inherits:

ResourceOperator

• Object
• SPARQL::Algebra::Operator::Binary
• ResourceOperator
• RDF::N3::Algebra::Str::StartsWith

Defined in:

lib/rdf/n3/algebra/str/starts_with.rb

Overview

True iff the subject string starts with the object string.

Constant Summary

NAME =

:strStartsWith

URI =

RDF::N3::Str.startsWith

Instance Attribute Summary

Attributes included from Enumerable

#existentials, #universals

Instance Method Summary

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

  Both subject and object are inputs.

• #resolve(resource, position:) ⇒ RDF::Literal

  Resolves inputs as strings.

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:

• left (RDF::Literal) —

  a literal

• right (RDF::Literal) —

  a literal

Returns:

• (RDF::Literal::Boolean)

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

def apply(left, right)
  RDF::Literal(left.to_s.start_with?(right.to_s))
end

#input_operand ⇒ Object

Both subject and object are inputs.

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

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

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

Resolves inputs as strings.

Parameters:

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

Returns:

• (RDF::Literal)

See Also:

• ResourceOperator#evaluate

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

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