code:     private String buildErrorMessage(Throwable e, Object[] args) {
          String errorKey = "struts.message.upload.error." + e.getClass().getSimpleName();
          if (LOG.isDebugEnabled())
              LOG.debug("Preparing error message for key: [#0]", errorKey);
          return LocalizedTextUtil.findText(this.getClass(), errorKey, defaultLocale, e.getMessage(), args);
      }
  
      /**
       * Build action message.
       *
       * @param e
       * @param args
       * @return
       */
  