Class: ShEx::Algebra::And

Inherits:
Operator show all
Includes:
Satisfiable
Defined in:
lib/shex/algebra/and.rb

Constant Summary collapse

NAME = 
:and

Constants inherited from Operator

Operator::ARITY

Instance Attribute Summary

Attributes inherited from Operator

#label, #logger, #operands, #options, #schema

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Satisfiable

#satisfiable?

Methods inherited from Operator

#base_uri, #closed?, #each_descendant, #eql?, #first_ancestor, #focus, #focus=, #inspect, iri, #iri, #matched, #matched=, #message, #message=, #not_matched, #not_satisfied, #operand, #parent, #parent=, #satisfiable?, #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=, #validate!, value, #value

Constructor Details

#initialize(*args, **options) ⇒ And

Returns a new instance of And.

Raises:

  • (ArgumentError) 


7
8
9
10
11
12
13
14
15
16
 
# File 'lib/shex/algebra/and.rb', line 7

def initialize(*args, **options)
  case
  when args.length < 2
    raise ArgumentError, "wrong number of arguments (given #{args.length}, expected 2..)"
  end

  # All arguments must be Satisfiable
  raise ArgumentError, "All operands must be Shape operands" unless args.all? {|o| o.is_a?(Satisfiable)}
  super
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class ShEx::Algebra::Operator

Class Method Details

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

Creates an operator instance from a parsed ShExJ representation

Returns:

Raises:

  • (ArgumentError) 


22
23
24
25
26
 
# File 'lib/shex/algebra/and.rb', line 22

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

Instance Method Details

#json_type ⇒ Object 



53
54
55
 
# File 'lib/shex/algebra/and.rb', line 53

def json_type
  "ShapeAnd"
end

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

S is a ShapeAnd and for every shape expression se2 in shapeExprs, satisfies(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)
  • (Operator) —

    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.



33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/shex/algebra/and.rb', line 33

def satisfies?(focus, depth: 0)
  status ""
  expressions = operands.select {|o| o.is_a?(Satisfiable)}
  satisfied = []
  unsatisfied = expressions.dup

  # Operand raises NotSatisfied, so no need to check here.
  expressions.each do |op|
    satisfied << op.satisfies?(focus, depth: depth)
    unsatisfied.shift
  end
  satisfy focus: focus, satisfied: satisfied, depth: depth
rescue ShEx::NotSatisfied => e
  not_satisfied e.message,
                focus:       focus, 
                satisfied:   satisfied,
                unsatisfied: unsatisfied,
                depth:       depth
end