Class: ShEx::Algebra::Not

Inherits:
Operator::Unary show all
Includes:
ShapeExpression
Defined in:
lib/shex/algebra/not.rb

Constant Summary collapse

NAME = 
:not

Constants inherited from Operator::Unary

Operator::Unary::ARITY

Constants inherited from Operator

Operator::ARITY

Instance Attribute Summary

Attributes inherited from Operator

#id, #logger, #operands, #options, #schema

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Operator::Unary

#initialize

Methods inherited from Operator

#base_uri, #closed?, #each_descendant, #eql?, #expression, #expressions, #focus, #focus=, #initialize, #inspect, iri, #iri, #matched, #matched=, #message, #message=, #not_matched, #not_satisfied, #operand, #parent, #parent=, #satisfied, #satisfied=, #satisfy, #semact?, #semantic_actions, #serialize_value, #status, #structure_error, #to_h, #to_json, #to_sxp, #to_sxp_bin, #triple_expression?, #unmatched, #unmatched=, #unsatisfied, #unsatisfied=, #value, value

Constructor Details

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

Class Method Details

.from_shexj(operator, options = {}) ⇒ Operator

Creates an operator instance from a parsed ShExJ representation

Returns:

Raises:

  • (ArgumentError) 


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# File 'lib/shex/algebra/not.rb', line 11

def self.from_shexj(operator, options = {})
  raise ArgumentError unless operator.is_a?(Hash) && operator['type'] == 'ShapeNot'
  raise ArgumentError, "missing shapeExpr in #{operator.inspect}" unless operator.has_key?('shapeExpr')
  super
end

Instance Method Details

#json_type ⇒ Object 



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# File 'lib/shex/algebra/not.rb', line 65

def json_type
  "ShapeNot"
end

#satisfies?(focus, depth: 0) ⇒ Boolean, ShapeExpression

S is a ShapeNot and for the shape expression se2 at shapeExpr, notSatisfies(n, se2, G, m).

Parameters:

  • focus (RDF::Resource)
  • depth (Integer) (defaults to: 0) —

    for logging

  • options (Hash{Symbol => Object}) —

    Other, operand-specific options

Returns:

  • (Boolean)
  • (ShapeExpression) —

    with ‘matched` and `satisfied` accessors for matched triples and sub-expressions

Raises:

  • (ShEx::NotMatched) —

    with ‘expression` accessor to access `matched` and `unmatched` statements along with `satisfied` and `unsatisfied` operations.

See Also:



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# File 'lib/shex/algebra/not.rb', line 23

def satisfies?(focus, depth: 0)
  status ""
  op = expressions.last
  satisfied_op = begin
    case op
    when RDF::Resource
      schema.enter_shape(op, focus) do |shape|
        if shape
          shape.satisfies?(focus, depth: depth + 1)
        else
          status "Satisfy as #{op} was re-entered for #{focus}", depth: depth
          shape
        end
      end
    when ShapeExpression
      op.satisfies?(focus, depth: depth + 1)
    end
  rescue ShEx::NotSatisfied => e
    return satisfy focus: focus, satisfied: e.expression.unsatisfied, depth: depth
  end
  not_satisfied "Expression should not have matched",
    focus: focus, unsatisfied: satisfied_op, depth: depth
end

#validate! ⇒ Operator

expression must be a ShapeExpression

Returns:

Raises:



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# File 'lib/shex/algebra/not.rb', line 52

def validate!
  case expression
  when ShapeExpression
  when RDF::Resource
    ref = schema.find(expression)
    ref.is_a?(ShapeExpression) ||
    structure_error("#{json_type} must reference a ShapeExpression: #{ref}")
  else
    structure_error("#{json_type} must reference a ShapeExpression: #{ref}")
  end
  super
end