Class: SkosImporter

Inherits:
Object
  • Object
show all
Defined in:
app/aides/skos_importer.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object, default_namespace_url, logger = Rails.logger, publish = true, verbose = false) ⇒ SkosImporter

Returns a new instance of SkosImporter.



20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
 
# File 'app/aides/skos_importer.rb', line 20

def initialize(object, default_namespace_url, logger = Rails.logger, publish = true, verbose = false)
  @file = case object
            when File
              File.open(object)
            when Array
              object
            else
              open(object)
          end

  @default_namespace_url = default_namespace_url
  @publish = publish
  @verbose = verbose
  @logger = logger

  unless @file.is_a?(File) || @file.is_a?(Array)
    raise "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

  @new_subjects = {} # Concepts, collections, labels etc. 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 remembered it's prefLabel...
  @unknown_second_level_triples = Set.new

  # 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
  first_level_object_classes.each do |klass|
    klass.select('origin').load.each do |thing|
      @existing_origins[thing.origin] = klass
    end
  end
end

Class Method Details

.prepend_first_level_object_classes(args) ⇒ Object 



16
17
18
 
# File 'app/aides/skos_importer.rb', line 16

def self.prepend_first_level_object_classes(args)
  self.first_level_object_classes.unshift(*args)
end

Instance Method Details

#run ⇒ Object 



77
78
79
80
81
 
# File 'app/aides/skos_importer.rb', line 77

def run
  print_known_namespaces
  print_known_import_classes
  import @file
end