app/models/concept/relation/skos/base.rb
# encoding: UTF-8
# Copyright 2011-2013 innoQ Deutschland GmbH
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
class Concept::Relation::SKOS::Base < Concept::Relation::Base
self.rdf_namespace = 'skos'
def self.build_from_rdf(rdf_subject, rdf_predicate, rdf_object)
raise "#{self.name}#build_from_rdf: Subject (#{rdf_subject}) must be a Concept." unless rdf_subject.is_a? Concept::Base
raise "#{self.name}#build_from_rdf: Object (#{rdf_object}) must be a Concept." unless rdf_object.is_a? Concept::Base
relation_class = RDFAPI::PREDICATE_DICTIONARY[rdf_predicate] || self
relation_instance = rdf_subject.send(self.name.to_relation_name).select{ |rel| rel.target == rdf_object }
if relation_instance.empty?
relation_instance = relation_class.new(target: rdf_object)
rdf_subject.send(self.name.to_relation_name) << relation_instance
end
if relation_class.bidirectional?
reverse_class = relation_class.reverse_relation_class
reverse_collection = rdf_object.send(reverse_class.name.to_relation_name)
if reverse_collection.select{ |rel| rel.target == rdf_subject }.empty?
reverse_instance = reverse_class.new(target: rdf_subject)
reverse_collection << reverse_instance
end
end
end
def build_rdf(document, subject, suppress_extra_labels = false)
subject.send(self.rdf_namespace.camelcase).send(self.rdf_predicate, IqRdf.build_uri(target.origin))
# Auto-include preferred labels for referenced concepts
unless suppress_extra_labels
document << IqRdf::build_uri(target.origin) do |subject|
target.pref_labelings.each do |labeling|
subject.Skos.send(labeling.rdf_predicate, labeling.target.value.to_s,
lang: labeling.target.language)
end
end
end
end
end