code: @Override
      protected Object readValue(final Object _object)
      {
          final String ret;
          if (_object instanceof String) {
              ret = (String) _object;
          } else if (_object != null) {
              ret = _object.toString();
          } else  {
              ret = null;
          }
          return ret == null ? ret : ret.trim();
      }
docs: {@inheritDoc}