Class: RDF::N3::Algebra::Str::Scrape
- Inherits:
-
ListOperator
- Object
- SPARQL::Algebra::Operator
- SPARQL::Algebra::Operator::Binary
- ListOperator
- RDF::N3::Algebra::Str::Scrape
- Includes:
- Builtin
- Defined in:
- vendor/bundler/ruby/3.3.0/bundler/gems/rdf-n3-a6ef81a7e1ce/lib/rdf/n3/algebra/str/scrape.rb
Overview
The subject is a list of two strings. The second string is a regular expression in the perl, python style. It must contain one group (a part in parentheses). If the first string in the list matches the regular expression, then the object is calculated as being the part of the first string which matches the group.
Constant Summary collapse
Constants included from Util::Logger
Constants inherited from SPARQL::Algebra::Operator::Binary
SPARQL::Algebra::Operator::Binary::ARITY
Constants inherited from SPARQL::Algebra::Operator
SPARQL::Algebra::Operator::ARITY, SPARQL::Algebra::Operator::IsURI
Constants included from SPARQL::Algebra::Expression
SPARQL::Algebra::Expression::PATTERN_PARENTS
Instance Attribute Summary
Attributes included from Enumerable
Attributes included from SPARQL::Algebra::Query
Attributes inherited from SPARQL::Algebra::Operator
Instance Method Summary collapse
- #resolve(list) ⇒ RDF::Term
-
#validate(list) ⇒ Boolean
Subclasses may override or supplement validate to perform validation on the list subject.
Methods included from Builtin
#each, #evaluate, #hash, #input_operand, #rank, #to_uri
Methods included from Util::Logger
#log_debug, #log_depth, #log_error, #log_fatal, #log_info, #log_recover, #log_recovering?, #log_statistics, #log_warn, #logger
Methods included from Enumerable
add_entailment, #canonicalize, #canonicalize!, #dump, #each_graph, #each_object, #each_predicate, #each_quad, #each_statement, #each_subject, #each_term, #each_triple, #entail, #enum_graph, #enum_object, #enum_predicate, #enum_quad, #enum_statement, #enum_subject, #enum_term, #enum_triple, #graph?, #graph_names, #invalid?, #method_missing, #object?, #objects, #predicate?, #predicates, #project_graph, #quad?, #quads, #respond_to_missing?, #statement?, #statements, #subject?, #subjects, #supports?, #term?, #terms, #to_a, #to_h, #to_set, #triple?, #triples, #valid?, #validate!
Methods included from Util::Aliasing::LateBound
Methods included from Isomorphic
#bijection_to, #isomorphic_with?
Methods included from Countable
Methods inherited from ListOperator
#as_literal, #execute, #input_operand
Methods included from SPARQL::Algebra::Update
#execute, #graph_name=, #unshift, #variables
Methods included from SPARQL::Algebra::Query
#each_solution, #empty?, #execute, #failed?, #graph_name=, #matched?, #query_yields_boolean?, #query_yields_solutions?, #query_yields_statements?, #unshift, #variables
Methods inherited from SPARQL::Algebra::Operator::Binary
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, #formulae, #initialize, #inspect, #ndvars, #node?, #operand, #optimize, #optimize!, #parent, #parent=, prefixes, #prefixes, prefixes=, #rewrite, #to_binary, #to_sparql, to_sparql, #to_sxp, #to_sxp_bin, #validate!, #variable?, #variables, #vars
Methods included from SPARQL::Algebra::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::Binary
Dynamic Method Handling
This class handles dynamic methods through the method_missing method in the class RDF::Enumerable
Instance Method Details
#resolve(list) ⇒ RDF::Term
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-n3-a6ef81a7e1ce/lib/rdf/n3/algebra/str/scrape.rb', line 15 def resolve(list) input, regex = list.to_a md = Regexp.new(regex.to_s).match(input.to_s) RDF::Literal(md[1]) if md end |
#validate(list) ⇒ Boolean
Subclasses may override or supplement validate to perform validation on the list subject
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-n3-a6ef81a7e1ce/lib/rdf/n3/algebra/str/scrape.rb', line 26 def validate(list) if super && list.length == 2 true else log_error(NAME) {"list must have exactly two entries: #{list.to_sxp}"} false end end |