Class: Iqvoc::SkosImporter

Inherits:
Object
  • Object
show all
Defined in:
lib/iqvoc/skos_importer.rb

Constant Summary collapse

FIRST_LEVEL_OBJECT_CLASSES = 
[Iqvoc::Concept.base_class, Iqvoc::Collection.base_class]
SECOND_LEVEL_OBJECT_CLASSES = 
Iqvoc::Concept.labeling_classes.keys +
Iqvoc::Concept.note_classes +
Iqvoc::Concept.relation_classes +
Iqvoc::Concept.match_classes +
Iqvoc::Concept.notation_classes +
Iqvoc::Concept.additional_association_classes.keys +
[Iqvoc::Concept.root_class] +
[Iqvoc::Collection.member_class]

Instance Method Summary collapse

Constructor Details

#initialize(file, default_namespace_url, logger = Rails.logger, publish = true) ⇒ SkosImporter

Returns a new instance of SkosImporter.



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# File 'lib/iqvoc/skos_importer.rb', line 16

def initialize(file, default_namespace_url, logger = Rails.logger, publish = true)
  @file = file
  @publish = publish

  @logger = logger

  unless @file.is_a?(File) || @file.is_a?(Array)
    raise "Iqvoc::SkosImporter#import: Parameter 'file' should be a File or an Array."
  end

  # Some general Namespaces to support in any case
  @prefixes = {
    "http://www.w3.org/2004/02/skos/core#" => "skos:",
    "http://www.w3.org/2008/05/skos#" => "skos:",
    "http://www.w3.org/1999/02/22-rdf-syntax-ns#" => "rdf:",
    default_namespace_url => ":"
  }
  # Add the namespaces specified in the Iqvoc config
  Iqvoc.rdf_namespaces.each do |pref, uri|
    @prefixes[uri] = "#{pref.to_s}:"
  end

  @seen_first_level_objects = {} # Concept cache (don't load any concept twice from db)

  # Assign the default concept scheme singleton instance as a seen first level object upfront
  # in order to handle a missing scheme definition in ntriple data
  @seen_first_level_objects[Iqvoc::Concept.root_class.instance.origin] = Iqvoc::Concept.root_class.instance

  @new_subjects = [] # Concepts to be published later

  # Triples the importer doesn't understand immediately. Example:
  #
  #     :a skos:prefLabel "foo". # => What is :a? Remember this and try again later
  #     ....
  #     :a rdf:type skos:Concept # => Now I know :a, good I remebered it's prefLabel...
  @unknown_second_level_triples = []

  # Hash of arrays of arrays: { "_:n123" => [["pred1", "obj1"], ["pred2", "obj2"]] }
  @blank_nodes = {}

  @existing_origins = {} # To prevent the creation of first level objects we already have
  Iqvoc::RDFAPI::FIRST_LEVEL_OBJECT_CLASSES.each do |klass|
    klass.select('origin').load.each do |thing|
      @existing_origins[thing.origin] = klass
    end
  end
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/iqvoc/skos_importer.rb', line 64

def run
  import @file
end