Class: SHACL::Algebra::PatternConstraintComponent

Inherits:
ConstraintComponent show all
Defined in:
lib/shacl/algebra/pattern.rb

Constant Summary collapse

NAME = 
:pattern

Constants inherited from Operator

Operator::BUILTIN_KEYS, Operator::PARAMETERS

Instance Attribute Summary

Attributes inherited from Operator

#graph, #options, #shapes_graph

Instance Method Summary collapse

Methods inherited from ConstraintComponent

from_json, ncname

Methods inherited from Operator

add_component, apply_op, #comment, component_params, #deactivated?, from_expanded_value, from_json, #id, iri, #iri, #label, #not_satisfied, params, parse_path, #satisfy, to_rdf, #to_sxp_bin, #type

Instance Method Details

#conforms(node, path: nil, depth: 0, **options) ⇒ Array<SHACL::ValidationResult>

Specifies a regular expression that each value node matches to satisfy the condition.

Examples:

ex:PatternExampleShape
  a sh:NodeShape ;
  sh:targetNode ex:Bob, ex:Alice, ex:Carol ;
  sh:property [
    sh:path ex:bCode ;
    sh:pattern "^B" ;    # starts with 'B'
    sh:flags "i" ;       # Ignore case
  ] .

Parameters:

  • node (RDF::Term) —

    focus node

  • path (RDF::URI, SPARQL::Algebra::Expression) (defaults to: nil) —

    (nil) the property path from the focus node to the value nodes.

  • options (Hash{Symbol => Object})

Returns:



23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/shacl/algebra/pattern.rb', line 23

def conforms(node, path: nil, depth: 0, **options)
  log_debug(NAME, depth: depth) {SXP::Generator.string({node: node}.to_sxp_bin)}
  pattern = Array(operands.first).first
  flags = operands.last.last if operands.last.is_a?(Array) && operands.last.first == :flags
  flags = flags.to_s
  regex_opts = 0
  regex_opts |= Regexp::MULTILINE  if flags.include?(?m)
  regex_opts |= Regexp::IGNORECASE if flags.include?(?i)
  regex_opts |= Regexp::EXTENDED   if flags.include?(?x)
  pat = Regexp.new(pattern, regex_opts)

  compares = !node.node? && pat.match?(node.to_s)
  satisfy(focus: node, path: path,
    value: node,
    message: "is#{' not' unless compares} a match #{pat.inspect}",
    resultSeverity: (options.fetch(:severity) unless compares),
    component: RDF::Vocab::SHACL.PatternConstraintComponent,
    **options)
end