@SuppressWarnings("unchecked")
  private void add(Configuration conf, String serializationName) {
    try {

      Class<? extends Serialization> serializionClass =
          (Class<? extends Serialization>) conf.getClassByName(serializationName);
      serializations.add(ReflectionUtils.newInstance(serializionClass, getConf()));
    } catch (ClassNotFoundException e) {
      LOG.warn("Serilization class not found: " + StringUtils.stringifyException(e));
    }
  }