Class: SPARQL::Algebra::Operator::Plus
- Inherits:
-
SPARQL::Algebra::Operator
- Object
- SPARQL::Algebra::Operator
- SPARQL::Algebra::Operator::Plus
- Includes:
- Evaluatable
- Defined in:
- lib/sparql/algebra/operator/plus.rb
Overview
The SPARQL numeric binary/unary +
operator.
[118] UnaryExpression ::= … | ‘+’ PrimaryExpression
[116] AdditiveExpression ::= MultiplicativeExpression ( ‘+’ MultiplicativeExpression )?
Constant Summary collapse
- NAME =
[:+, :plus]
Constants inherited from SPARQL::Algebra::Operator
Constants included from Expression
Instance Attribute Summary
Attributes inherited from SPARQL::Algebra::Operator
Instance Method Summary collapse
-
#apply(left, right = nil, **options) ⇒ RDF::Literal::Numeric, RDF::Literal::Temporal
Returns the arithmetic sum of the operands, unless there is no
right
. -
#to_sparql(**options) ⇒ String
Returns a partial SPARQL grammar for this operator.
Methods included from Evaluatable
#evaluate, #memoize, #replace_aggregate!, #replace_vars!
Methods inherited from SPARQL::Algebra::Operator
#aggregate?, arity, #base_uri, base_uri, base_uri=, #bind, #boolean, #constant?, #deep_dup, #each_descendant, #eql?, #evaluatable?, evaluate, #executable?, #first_ancestor, for, #initialize, #inspect, #ndvars, #node?, #operand, #optimize, #optimize!, #parent, #parent=, #prefixes, prefixes, prefixes=, #rewrite, #to_binary, to_sparql, #to_sxp, #to_sxp_bin, #validate!, #variable?, #variables, #vars
Methods included from Expression
cast, #constant?, #evaluate, extension, extension?, extensions, for, #invalid?, new, #node?, open, #optimize, #optimize!, parse, register_extension, #to_sxp_bin, #valid?, #validate!, #variable?
Constructor Details
This class inherits a constructor from SPARQL::Algebra::Operator
Instance Method Details
#apply(left, right = nil, **options) ⇒ RDF::Literal::Numeric, RDF::Literal::Temporal
Returns the arithmetic sum of the operands, unless there is no right
.
56 57 58 59 60 61 62 63 64 65 66 |
# File 'lib/sparql/algebra/operator/plus.rb', line 56 def apply(left, right = nil, **) case when left.is_a?(RDF::Literal::Numeric) && right.is_a?(RDF::Literal::Numeric) left + right when left.is_a?(RDF::Literal::Numeric) && right.nil? left when left.is_a?(RDF::Literal::Temporal) && right.is_a?(RDF::Literal::Duration) left + right else raise TypeError, "expected two RDF::Literal::Numeric operands or a Temporal and a Duration, but got #{left.inspect} and #{right.inspect}" end end |
#to_sparql(**options) ⇒ String
Returns a partial SPARQL grammar for this operator.
73 74 75 |
# File 'lib/sparql/algebra/operator/plus.rb', line 73 def to_sparql(**) "(#{operands.first.to_sparql(**)} + #{operands.last.to_sparql(**)})" end |