module MultiXml

def parser=(new_parser)
  case new_parser
  when String, Symbol
    require "multi_xml/parsers/#{new_parser.to_s.downcase}"
    @parser = MultiXml::Parsers.const_get(new_parser.to_s.split("_").collect(&:capitalize).join.to_s)
  when Class, Module
    @parser = new_parser
  else
    raise("Did not recognize your parser specification. Please specify either a symbol or a class.")
  end
end