Class: ActiveTriples::List
- Inherits:
-
RDF::List
- Object
- RDF::List
- ActiveTriples::List
- Extended by:
- Configurable
- Includes:
- NestedAttributes, Properties, Reflection
- Defined in:
- lib/active_triples/list.rb
Overview
An implementation of RDF::List intregrated with ActiveTriples.
A thoughtful reflection period is encouraged before using the rdf:List concept in your data. The community may pursue other options for ordered sets.
Defined Under Namespace
Classes: ListResource
Class Method Summary collapse
Instance Method Summary collapse
-
#<<(value) ⇒ Object
Monkey patch to allow lists to have subject URIs.
- #[]=(idx, value) ⇒ Object
- #clear ⇒ Object
-
#each(&block) ⇒ Object
Override to return AF::Rdf::Resources as values, where appropriate.
-
#first ⇒ Object
Do these like #each.
-
#initialize(subject: nil, graph: nil, values: nil, &block) ⇒ List
constructor
A new instance of List.
-
#node_from_value(value) ⇒ Object
find an AF::Rdf::Resource from the value returned by RDF::List.
- #resource ⇒ Object
Methods included from Configurable
base_uri, configuration, configure, inherited, rdf_label, repository, transform_type, type
Methods included from Reflection
Constructor Details
#initialize(subject: nil, graph: nil, values: nil, &block) ⇒ List
Returns a new instance of List.
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# File 'lib/active_triples/list.rb', line 29 def initialize(subject: nil, graph: nil, values: nil, &block) super @graph = ListResource.new(subject) unless graph.kind_of? RDFSource @graph << parent if parent @graph.list = self @graph.reload end |
Class Method Details
.from_uri(uri, vals) ⇒ Object
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# File 'lib/active_triples/list.rb', line 19 def from_uri(uri, vals) list = ListResource.from_uri(uri, vals) self.new(subject: list.rdf_subject, graph: list) end |
Instance Method Details
#<<(value) ⇒ Object
Monkey patch to allow lists to have subject URIs. Overrides RDF::List to prevent URI subjects from being replaced with nodes.
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# File 'lib/active_triples/list.rb', line 151 def <<(value) value = case value when nil then RDF.nil when RDF::Value then value when Array then RDF::List.new(nil, graph, value) else value end if subject == RDF.nil @subject = RDF::Node.new @graph = ListResource.new(subject) @graph.list = self @graph.type = RDF.List end if empty? @graph.type = RDF.List resource.set_value(RDF.first, value) resource.insert([subject.to_term, RDF.rest, RDF.nil]) resource << value if value.kind_of? RDFSource return self end super if value.kind_of? RDFSource resource << value value.set_persistence_strategy(ParentStrategy) value.persistence_strategy.parent = resource end end |
#[]=(idx, value) ⇒ Object
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# File 'lib/active_triples/list.rb', line 47 def []=(idx, value) raise IndexError "index #{idx} too small for array: minimum 0" if idx < 0 if idx >= length (idx - length).times do self << RDF::OWL.Nothing end return self << value end each_subject.with_index do |v, i| next unless i == idx resource.set_value(v, RDF.first, value) end end |
#clear ⇒ Object
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# File 'lib/active_triples/list.rb', line 38 def clear graph.send :erase_old_resource old_subject = subject super @subject = old_subject @graph = ListResource.new(subject) graph.list = self end |
#each(&block) ⇒ Object
Override to return AF::Rdf::Resources as values, where appropriate.
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# File 'lib/active_triples/list.rb', line 65 def each(&block) return super unless block_given? super { |value| yield node_from_value(value) } end |
#first ⇒ Object
Do these like #each.
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# File 'lib/active_triples/list.rb', line 72 def first node_from_value(super) end |
#node_from_value(value) ⇒ Object
find an AF::Rdf::Resource from the value returned by RDF::List
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# File 'lib/active_triples/list.rb', line 78 def node_from_value(value) return value unless value.is_a? RDF::Resource return value if value.is_a? RDFSource type_uri = resource.query([value, RDF.type, nil]).to_a.first.try(:object) klass = RDFSource.type_registry[type_uri] klass ||= Resource klass.from_uri(value, resource) end |
#resource ⇒ Object
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# File 'lib/active_triples/list.rb', line 25 def resource graph end |