Method: MARC::XMLReader.best_available

Defined in:
lib/marc/xmlreader.rb

.best_available ⇒ Object

Returns the value of the best available parser



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# File 'lib/marc/xmlreader.rb', line 117

def best_available
  parser = nil
  if defined? JRUBY_VERSION
    unless parser
      begin
        require "nokogiri"
        parser = USE_NOKOGIRI
      rescue LoadError
      end
    end
    unless parser
      begin
        # try to find the class, so we throw an error if not found
        java.lang.Class.forName("javax.xml.stream.XMLInputFactory")
        parser = USE_JSTAX
      rescue java.lang.ClassNotFoundException
      end
    end
    unless parser
      begin
        require "jrexml"
        parser = USE_JREXML
      rescue LoadError
      end
    end
  else
    begin
      require "nokogiri"
      parser = USE_NOKOGIRI
    rescue LoadError
    end
    unless defined? JRUBY_VERSION
      unless parser
        begin
          require "xml"
          parser = USE_LIBXML
        rescue LoadError
        end
      end
    end
  end
  parser ||= USE_REXML
  parser
end