Class: RDFObject::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/rdf_objects/parsers.rb

Class Method Summary collapse

Class Method Details

.parse(rdf) ⇒ Object

Choose the best format parser from an admittedly small group of choices.



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# File 'lib/rdf_objects/parsers.rb', line 145

def self.parse(rdf)
  begin
    # Check if the format is XML or RDFa
    doc = Nokogiri::XML.parse(rdf, nil, nil, Nokogiri::XML::ParseOptions::PEDANTIC)
    raise "Unable to parse XML/HTML document -- no namespace declared" unless doc.root.namespaces
    if doc.root.namespaces.values.index("http://www.w3.org/1999/xhtml")
      collection = RDFAParser.parse(doc)
    else
      collection = XMLParser.parse(doc)
    end
  rescue Nokogiri::XML::SyntaxError
    begin
      if rdf.respond_to?(:read)
        json = JSON.parse(rdf.read)
      else
        json = JSON.parse(rdf)
      end
      collection = JSONParser.parse(json)
    rescue JSON::ParserError
      if rdf.respond_to?(:read)
        rdf.rewind
      end
      collection = NTriplesParser.parse(rdf)
    end
  end
  collection  
end