Class: ShEx::Algebra::Value

Inherits:
Operator::Unary show all
Defined in:
lib/shex/algebra/value.rb

Constant Summary collapse

NAME = 
:value

Constants inherited from Operator::Unary

Operator::Unary::ARITY

Constants inherited from Operator

Operator::ARITY

Instance Attribute Summary

Attributes inherited from Operator

#operands, #options, #schema

Instance Method Summary collapse

Methods inherited from Operator::Unary

#initialize

Methods inherited from Operator

#closed?, #each_descendant, #eql?, #first_ancestor, #initialize, #inspect, #not_matched, #not_satisfied, #operand, #parent, #parent=, #satisfiable?, #semact?, #semantic_actions, #status, #structure_error, #to_sxp, #to_sxp_bin, #triple_expression?, #validate!

Constructor Details

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

Instance Method Details

#match?(value) ⇒ Boolean

For a node n and constraint value v, nodeSatisfies(n, v) if n matches some valueSetValue vsv in v. A term matches a valueSetValue if:

  • vsv is an objectValue and n = vsv.

  • vsv is a Stem with stem st and nodeIn(n, st).

  • vsv is a StemRange with stem st and exclusions excls and nodeIn(n, st) and there is no x in excls such that nodeIn(n, excl).

  • vsv is a Wildcard with exclusions excls and there is no x in excls such that nodeIn(n, excl).

Returns:

  • (Boolean) 


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# File 'lib/shex/algebra/value.rb', line 13

def match?(value)
  status ""
  if case expr = operands.first
    when RDF::Value then value.eql?(expr)
    when Stem, StemRange then expr.match?(value)
    else false
    end
    status "matched #{value}"
    true
  else
    status "not matched #{value}"
    false
  end
end