Class: ActiveFedora::RdfNode::TermProxy

Inherits:
Object
  • Object
show all
Defined in:
lib/active_fedora/rdf_node/term_proxy.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(graph, subject, predicate, options) ⇒ TermProxy

Returns a new instance of TermProxy.

Parameters:

  • graph —

    RDF::Graph

  • subject —

    RDF::URI

  • options —

    Hash



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 14

def initialize(graph, subject, predicate, options)
  @graph = graph
  @subject = subject
  @predicate = predicate
  @options = options
end

Instance Attribute Details

#graph ⇒ Object (readonly)

Returns the value of attribute graph.



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 5

def graph
  @graph
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 5

def options
  @options
end

#predicate ⇒ Object (readonly)

Returns the value of attribute predicate.



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 5

def predicate
  @predicate
end

#subject ⇒ Object (readonly)

Returns the value of attribute subject.



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 5

def subject
  @subject
end

Instance Method Details

#<<(*values) ⇒ Object 



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 27

def <<(*values)
  values.each { |value| graph.append(subject, predicate, value) }
  values
end

#build ⇒ Object 



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 21

def build
  new_subject = RDF::Node.new
  graph.graph.insert([subject, predicate, new_subject])
  graph.target_class(predicate).new(graph.graph, new_subject)
end

#delete(*values) ⇒ Object 



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 32

def delete(*values)
  values.each do |value| 
    graph.delete_predicate(subject, predicate, value)
  end

  values
end

#values ⇒ Object 



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# File 'lib/active_fedora/rdf_node/term_proxy.rb', line 40

def values
  values = []

  graph.query(subject, predicate).each do |solution|
    v = solution.value
    v = v.to_s if v.is_a? RDF::Literal
    if options[:type] == :date
      v = Date.parse(v)
    end
    values << v
  end
  if options[:class_name]
    values = values.map{ |found_subject| graph.target_class(predicate).new(graph.graph, found_subject)}
  end
  
  values
end