code: @Override
      public void execute()
      {
          try {
              // evaluate now to give the chance to change the mode
              if (evaluate4Instance()) {
                  if (isCreateMode() || isSearchMode()) {
                      execute4NoInstance();
                  } else {
                      if (getInstance() == null) {
                          execute4NoInstance();
                      } else {
                          execute4Instance();
                      }
                  }
              }
          } catch (final EFapsException e) {
              throw new RestartResponseException(new ErrorPage(e));
          }
          super.setInitialized(true);
      }
docs: Method is used to execute the UIForm. (Fill it with data).