Module: FRBR::Manifestation

Includes:
Group1, Group3
Defined in:
lib/frbr/manifestation.rb

Instance Attribute Summary collapse

Attributes included from Group3

#related_subjects, #subject_of

Attributes included from Group1

#relationships

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Group3

#add_related_subject, #add_subject_of, check_frbr_validity, #remove_related_subject, #remove_subject_of

Methods included from Group1

check_frbr_validity, #related

Instance Attribute Details

#embodiment_of ⇒ Object (readonly) Also known as: expression

Returns the value of attribute embodiment_of.



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# File 'lib/frbr/manifestation.rb', line 5

def embodiment_of
  @embodiment_of
end

#exemplars ⇒ Object (readonly) Also known as: items

Returns the value of attribute exemplars.



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# File 'lib/frbr/manifestation.rb', line 5

def exemplars
  @exemplars
end

#producers ⇒ Object (readonly)

Returns the value of attribute producers.



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# File 'lib/frbr/manifestation.rb', line 5

def producers
  @producers
end

Class Method Details

.valid_relationships ⇒ Object 



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# File 'lib/frbr/manifestation.rb', line 83

def self.valid_relationships
  {:accompanied_by=>:accompanies, :described_in=>:describes, :contains=>:contained_in, :reproduction=>:reproduction_of, :related=>:related}      
end

Instance Method Details

#add_exemplar(item) ⇒ Object Also known as: add_item

Raises:

  • (ArgumentError) 


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# File 'lib/frbr/manifestation.rb', line 40

def add_exemplar(item)
  raise ArgumentError, "Exemplar must an item" unless item.is_a?(FRBR::Item)
  @exemplars ||= []
  @exemplars << item unless @exemplars.index(item)
  item.is_exemplar_of(self)
end

#add_producer(producer) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/frbr/manifestation.rb', line 56

def add_producer(producer)
  raise ArgumentError, "Producer must be a Group 2 entity" unless producer.is_a?(FRBR::Group2)
  @producers ||= []
  @producers << producer unless @producers.index(producer)
  producer.add_production(self) unless producer.producer_of?(self)
end

#add_related(expression) ⇒ Object 



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# File 'lib/frbr/manifestation.rb', line 73

def add_related(expression)
  (action, relationship) = this_method.split("_")
  self.add_relationship_to_entity(expression, relationship.to_sym, FRBR::Manifestation, true)
end

#clear_embodiment_of ⇒ Object Also known as: clear_manifestation_of 



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# File 'lib/frbr/manifestation.rb', line 29

def clear_embodiment_of
  if @embodiment_of && !@embodiment_of.nil?
    if @embodiment_of.embodiments && @embodiment_of.embodiments.index(self)
      @embodiment_of.remove_embodiment(self)
    end
    @embodiment_of = nil
  end
end

#equivalents ⇒ Object 



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# File 'lib/frbr/manifestation.rb', line 10

def equivalents
  equivalents = []
  if self.embodiment_of
    self.embodiment_of.embodiments.each do | manifestation |
      next if manifestation == self
      equivalents << manifestation
    end
  end
  equivalents
end

#has_producer?(agent) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/frbr/manifestation.rb', line 68

def has_producer?(agent)  
  return true if @producers && @producers.index(agent)
  return false
end

#is_embodiment_of(expression) ⇒ Object Also known as: is_manifestation_of

Raises:

  • (ArgumentError) 


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# File 'lib/frbr/manifestation.rb', line 21

def is_embodiment_of(expression)      
  raise ArgumentError, "Must be the embodiment of an expression" unless expression.is_a?(FRBR::Expression)
  @embodiment_of = expression
  expression.add_embodiment(self) unless expression.embodiments && expression.embodiments.index(self)
end

#remove_exemplar(item) ⇒ Object Also known as: remove_item 



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# File 'lib/frbr/manifestation.rb', line 49

def remove_exemplar(item)
  @exemplars.delete(item) if @exemplars
  item.clear_exemplar_of
end

#remove_producer(producer) ⇒ Object 



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# File 'lib/frbr/manifestation.rb', line 63

def remove_producer(producer)
  @producers.delete(producer)
  producer.remove_production(self) if producer.producer_of?(self)
end

#remove_related(expression) ⇒ Object 



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# File 'lib/frbr/manifestation.rb', line 78

def remove_related(expression)
  (action, relationship) = this_method.split("_")
  self.remove_relationship_from_entity(expression, relationship.to_sym, FRBR::Manifestation, true)
end