Method: Traject::MarcExtractor#specs_covering_field

Defined in:
lib/traject/marc_extractor.rb

#specs_covering_field(field) ⇒ Object

Find Spec objects, if any, covering extraction from this field. Returns an array of 0 or more MarcExtractor::Spec objects

When given an 880, will return the spec (if any) for the linked tag iff we have a $6 and we want the alternate script.

Returns an empty array in case of no matching extraction specs.



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# File 'lib/traject/marc_extractor.rb', line 325

def specs_covering_field(field)
  tag = field.tag

  # Short-circuit the unintersting stuff
  return [] unless interesting_tag?(tag)

  # Due to bug in jruby https://github.com/jruby/jruby/issues/886 , we need
  # to do this weird encode gymnastics, which fixes it for mysterious reasons.

  if tag == "880" && field['6']
    tag = field["6"].encode(field["6"].encoding).byteslice(0,3)
  end

  # Take the resulting tag and get the spec from it (or the default nil if there isn't a spec for this tag)
  spec = self.spec_hash[tag] || []
end