Module: ActiveFedora::Predicates
- Defined in:
- lib/active_fedora/predicates.rb
Class Method Summary collapse
- .default_predicate_namespace ⇒ Object
- .find_graph_predicate(predicate) ⇒ Object
- .find_predicate(predicate) ⇒ Object
- .predicate_config ⇒ Object
- .predicate_config=(value) ⇒ Object
-
.predicate_lookup(predicate, namespace = "info:fedora/fedora-system:def/relations-external#") ⇒ Object
If predicate is a symbol, looks up the predicate in the predicate_mappings If predicate is not a Symbol, returns the predicate untouched.
- .predicate_mappings ⇒ Object
- .predicate_namespaces ⇒ Object
- .vocabularies(vocabs = {}) ⇒ Object
Class Method Details
.default_predicate_namespace ⇒ Object
72 73 74 |
# File 'lib/active_fedora/predicates.rb', line 72 def self.default_predicate_namespace predicate_config[:default_namespace] end |
.find_graph_predicate(predicate) ⇒ Object
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 |
# File 'lib/active_fedora/predicates.rb', line 3 def self.find_graph_predicate(predicate) #TODO, these could be cached case predicate when :has_model, "hasModel", :hasModel xmlns="info:fedora/fedora-system:def/model#" begin rel_predicate = predicate_lookup(predicate,xmlns) rescue UnregisteredPredicateError xmlns = nil rel_predicate = nil end else xmlns="info:fedora/fedora-system:def/relations-external#" begin rel_predicate = predicate_lookup(predicate,xmlns) rescue UnregisteredPredicateError xmlns = nil rel_predicate = nil end end unless xmlns && rel_predicate rel_predicate, xmlns = find_predicate(predicate) end vocabularies[xmlns][rel_predicate] end |
.find_predicate(predicate) ⇒ Object
76 77 78 79 80 81 82 83 |
# File 'lib/active_fedora/predicates.rb', line 76 def self.find_predicate(predicate) predicate_mappings.each do |namespace,predicates| if predicates.fetch(predicate,nil) return predicates[predicate], namespace end end raise ActiveFedora::UnregisteredPredicateError, "Unregistered predicate: #{predicate.inspect}" end |
.predicate_config ⇒ Object
60 61 62 |
# File 'lib/active_fedora/predicates.rb', line 60 def self.predicate_config @@predicate_config ||= ActiveFedora.predicate_config end |
.predicate_config=(value) ⇒ Object
53 54 55 56 57 58 |
# File 'lib/active_fedora/predicates.rb', line 53 def self.predicate_config= value unless value.nil? or (value.is_a?(Hash) and [:predicate_mapping,:default_namespace].all? { |key| value.has_key? key }) raise TypeError, "predicate_config must specify :predicate_mapping and :default_namespace" end @@predicate_config = value end |
.predicate_lookup(predicate, namespace = "info:fedora/fedora-system:def/relations-external#") ⇒ Object
If predicate is a symbol, looks up the predicate in the predicate_mappings If predicate is not a Symbol, returns the predicate untouched
42 43 44 45 46 47 48 49 50 51 |
# File 'lib/active_fedora/predicates.rb', line 42 def self.predicate_lookup(predicate,namespace="info:fedora/fedora-system:def/relations-external#") if predicate.class == Symbol if predicate_mappings[namespace].has_key?(predicate) return predicate_mappings[namespace][predicate] else raise ActiveFedora::UnregisteredPredicateError end end return predicate end |
.predicate_mappings ⇒ Object
68 69 70 |
# File 'lib/active_fedora/predicates.rb', line 68 def self.predicate_mappings predicate_config[:predicate_mapping] end |
.predicate_namespaces ⇒ Object
64 65 66 |
# File 'lib/active_fedora/predicates.rb', line 64 def self.predicate_namespaces predicate_config[:predicate_namespaces] ||= {} end |
.vocabularies(vocabs = {}) ⇒ Object
31 32 33 34 35 36 37 |
# File 'lib/active_fedora/predicates.rb', line 31 def self.vocabularies(vocabs = {}) @vocabularies ||= vocabs predicate_mappings.keys.each do |ns| @vocabularies[ns] = RDF::Vocabulary.new(ns) unless @vocabularies.has_key? ns end @vocabularies end |