Module: Sufia::GenericFile::Characterization

Extended by:
ActiveSupport::Concern
Included in:
Sufia::GenericFile
Defined in:
lib/sufia/generic_file/characterization.rb

Instance Method Summary collapse

Instance Method Details

#append_metadata ⇒ Object

Populate descMetadata with fields from FITS (e.g. Author from pdfs)



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# File 'lib/sufia/generic_file/characterization.rb', line 44

def append_metadata
  terms = self.characterization_terms
  Sufia::Engine.config.fits_to_desc_mapping.each_pair do |k, v|
    if terms.has_key?(k)
      # coerce to array to remove a conditional
      terms[k] = [terms[k]] unless terms[k].is_a? Array
      terms[k].each do |term_value|
        proxy_term = self.send(v)
        if proxy_term.kind_of?(Array)
          proxy_term << term_value unless proxy_term.include?(term_value)
        else
          # these are single-valued terms which cannot be appended to
          self.send("#{v}=", term_value)
        end
      end
    end
  end
end

#characterization_terms ⇒ Object 



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# File 'lib/sufia/generic_file/characterization.rb', line 63

def characterization_terms
  h = {}
  self.characterization.class.terminology.terms.each_pair do |k, v|
    next unless v.respond_to? :proxied_term
    term = v.proxied_term
    begin
      value = self.send(term.name)
      h[term.name] = value unless value.empty?
    rescue NoMethodError
      next
    end
  end
  h
end

#characterize ⇒ Object

Extract the metadata from the content datastream and record it in the characterization datastream



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# File 'lib/sufia/generic_file/characterization.rb', line 36

def characterize
  self.characterization.ng_xml = self.content.extract_metadata
  self.append_metadata
  self.filename = self.label
  save unless self.new_object?
end

#characterize_if_changed ⇒ Object 



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# File 'lib/sufia/generic_file/characterization.rb', line 28

def characterize_if_changed
  content_changed = self.content.changed?
  yield
  #logger.debug "DOING CHARACTERIZE ON #{self.pid}"
  Sufia.queue.push(CharacterizeJob.new(self.pid)) if content_changed
end