Class: Marc2LinkedData::OclcCreativeWork

Inherits:
OclcResource show all
Defined in:
lib/marc2linkeddata/oclc_creative_work.rb

Constant Summary collapse

PREFIX = 
'http://www.worldcat.org/oclc/'

Instance Attribute Summary

Attributes inherited from Resource

#iri

Instance Method Summary collapse

Methods inherited from OclcResource

#about, #book?, #contributor?, #contributors, #creator?, #creators, #editor?, #editors, #initialize, #isbns, #media_object?, #publishers, #rdf

Methods inherited from Resource

#get_rdf, #id, #initialize, #iri_types, #rdf, #rdf_find_object, #rdf_find_subject, #rdf_uri, #rdf_valid?, #resolve_external_auth, #same_as, #same_as_array

Constructor Details

This class inherits a constructor from Marc2LinkedData::OclcResource

Instance Method Details

#get_works ⇒ Object 



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# File 'lib/marc2linkeddata/oclc_creative_work.rb', line 9

def get_works
  # assume an exampleOfWork can only ever link to one work?
  q = query_work(@iri)
  works = rdf.query(q).collect {|s| s[:o] }
  if works.empty?
    # OCLC data is inconsistent in use of 'www.' in IRI, so try again.
    # The OclcResource coerces @iri so it includes 'www.', so try without it.
    uri = @iri.to_s.gsub('www.','')
    q = query_work(uri)
    works = rdf.query(q).collect {|s| s[:o] }
  end
  if works.empty?
    # Keep the 'www.', cast the ID to an integer.
    uri = @iri.to_s.gsub(id, id.to_i.to_s)
    q = query_work(uri)
    works = rdf.query(q).collect {|s| s[:o] }
  end
  if works.empty?
    # Remove the 'www.' AND cast the ID to an integer.
    uri = @iri.to_s.gsub('www.','').gsub(id, id.to_i.to_s)
    q = query_work(uri)
    works = rdf.query(q).collect {|s| s[:o] }
  end
  works
end

#query_work(uri) ⇒ Object 



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# File 'lib/marc2linkeddata/oclc_creative_work.rb', line 35

def query_work(uri)
  SPARQL.parse("SELECT * WHERE { <#{uri}> <http://schema.org/exampleOfWork> ?o }")
end