class Fedora::FedoraObject

def state=(new_state)
  if ["I", "A", "D"].include? new_state
    self.attributes[:state]  = new_state
  else
    raise 'The object state of "' + new_state + '" is invalid. The allowed values for state are:  A (active), D (deleted), and I (inactive).'
  end
end