Class: BibframeRuby::GraphBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/bibframe_ruby/graph_builder.rb

Overview

Walks an RDF::Graph to instantiate typed model objects, populate their properties, and link relationships.

Constant Summary collapse

BF = 
"http://id.loc.gov/ontologies/bibframe/"
BFLC = 
"http://id.loc.gov/ontologies/bflc/"
RDF_TYPE = 
RDF.type.to_s
RDFS_LABEL = 
RDF::RDFS.label.to_s
TYPE_MAP = 
{
  "#{BF}Hub" => Hub,
  "#{BF}Work" => Work,
  "#{BF}Instance" => Instance,
  "#{BF}Item" => Item,
  "#{BF}Contribution" => Contribution,
  "#{BF}PrimaryContribution" => Contribution,
  "#{BF}Title" => Title,
  "#{BF}Person" => Person,
  "#{BF}Organization" => Organization,
  "#{BF}Subject" => Subject
}.freeze
PROPERTY_MAP =

Maps BIBFRAME predicates to Ruby property names

{
  "#{BF}title" => "title",
  "#{BF}mainTitle" => "main_title",
  "#{BF}subtitle" => "subtitle",
  "#{BFLC}nonSortNum" => "non_sort_num",
  "#{BF}contribution" => "contributions",
  "#{BF}hasInstance" => "instances",
  "#{BF}instanceOf" => "work",
  "#{BF}hasItem" => "items",
  "#{BF}itemOf" => "instance",
  "#{BF}language" => "language",
  "#{BF}summary" => "summary",
  "#{BF}genreForm" => "genre_forms",
  "#{BF}classification" => "classifications",
  "#{BF}relation" => "relations",
  "#{BF}identifiedBy" => "identifiers",
  "#{BF}extent" => "extent",
  "#{BF}carrier" => "carrier",
  "#{BF}media" => "media",
  "#{BF}provisionActivity" => "provision_activity",
  "#{BF}editionStatement" => "edition_statement",
  "#{BF}dimensions" => "dimensions",
  "#{BF}publicationStatement" => "publication_statement",
  "#{BF}responsibilityStatement" => "responsibility_statement",
  "#{BF}issuance" => "issuance",
  "#{BF}agent" => "agent",
  "#{BF}role" => "role",
  "#{BF}heldBy" => "held_by",
  "#{BF}shelfMark" => "shelf_mark",
  "#{BF}content" => "content",
  "#{BF}subject" => "subjects",
  RDFS_LABEL => "label",
  "#{BF}code" => "code",
  "#{BF}source" => "source",
  "#{BF}status" => "status",
  "#{BF}date" => "date",
  "#{BF}seriesEnumeration" => "series_enumeration",
  "#{BF}associatedResource" => "associated_resource",
  "#{BF}relationship" => "relationship",
  "#{BF}adminMetadata" => "admin_metadata",
  "#{BF}derivedFrom" => "derived_from",
  "#{BF}assigner" => "assigner",
  "#{BF}classificationPortion" => "classification_portion",
  "#{BF}itemPortion" => "item_portion",
  "#{BF}edition" => "edition",
  "#{BF}descriptionLevel" => "description_level",
  "#{BF}descriptionLanguage" => "description_language",
  "#{BF}descriptionAuthentication" => "description_authentication",
  "#{BFLC}catalogerId" => "cataloger_id",
  "#{BFLC}aap" => "Authorized Access Point",
  "#{BFLC}aap-normalized" => "aap_normalized",
  "#{BFLC}simpleDate" => "simple_date",
  "#{BFLC}simpleAgent" => "simple_agent",
  "#{BFLC}simplePlace" => "simple_place"
}.freeze
ARRAY_PROPERTIES =

Properties that always hold arrays

%w[
  contributions instances items genre_forms classifications
  relations identifiers subjects admin_metadata
].freeze
LABEL_COLLAPSE_PROPERTIES =

Properties whose blank-node value should be collapsed to its rdfs:label string

%w[summary extent].freeze

Instance Method Summary collapse

Constructor Details

#initialize(rdf_graph) ⇒ GraphBuilder

Returns a new instance of GraphBuilder.



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# File 'lib/bibframe_ruby/graph_builder.rb', line 91

def initialize(rdf_graph)
  @rdf_graph = rdf_graph
  @resources = {}
  @stubs = {}
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/bibframe_ruby/graph_builder.rb', line 97

def build
  grouped = group_by_subject
  extract_resources(grouped)
  link_relationships

  {
    resources: @resources,
    works: @resources.values.grep(Work),
    instances: @resources.values.grep(Instance),
    items: @resources.values.grep(Item),
    hubs: @resources.values.grep(Hub)
  }
end