int type = getDataType( locator ); if (type != DOUBLE_DATA_TYPE) { throw new SetDataException ("The target dataCell is not a String"); }
   public void appendData (Locator locator, String stringValue)    throws SetDataException    {      String strData;      try {         strData = getStringData(locator);         strData += stringValue;      }      catch (NoDataException e) {         strData = stringValue;      }      setData(locator, strData);   }