Class: Cocina::Models::Mapping::FromMods::TitleBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/cocina/models/mapping/from_mods/title_builder.rb

Overview

Maps titles

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(title_info_element:, notifier:) ⇒ TitleBuilder

Returns a new instance of TitleBuilder.



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# File 'lib/cocina/models/mapping/from_mods/title_builder.rb', line 16

def initialize(title_info_element:, notifier:)
  @title_info_element = title_info_element
  @notifier = notifier
end

Class Method Details

.build(title_info_element:, notifier:) ⇒ Hash

Returns a hash that can be mapped to a cocina model.

Parameters:

Returns:

  • (Hash) —

    a hash that can be mapped to a cocina model



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# File 'lib/cocina/models/mapping/from_mods/title_builder.rb', line 12

def self.build(title_info_element:, notifier:)
  new(title_info_element: title_info_element, notifier: notifier).build
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/cocina/models/mapping/from_mods/title_builder.rb', line 21

def build
  return { valueAt: title_info_element['xlink:href'] } if title_info_element['xlink:href']

  # Find all the child nodes that have text
  return nil if title_info_element.children.empty?

  children = title_info_element.xpath('./*[child::node()[self::text()]]')
  if children.empty?
    notifier.warn('Empty title node')
    return nil
  end

  notifier.warn('Title with type') if children_with_type?(children)

  # If a displayLabel only with no title text element
  # Note: this is an error condition,
  # exceptions documented at: https://github.com/sul-dlss-labs/cocina-descriptive-metadata/blob/master/mods_cocina_mappings/mods_to_cocina_value_dependencies.txt
  return {} if children.map(&:name) == []

  # Is this a basic title or a title with parts
  return simple_value(title_info_element) if simple_title?(children)

  structured_value(children)
end