public class TabbedFormPage extends AbstractPage {
  private TabbedForm form = null;

  @Override
  protected void execPageActivated() throws ProcessingException {
    form = new TabbedForm();
    form.setDisplayHint(IForm.DISPLAY_HINT_VIEW);
    form.setDisplayViewId(IForm.VIEW_ID_PAGE_DETAIL);
    form.setEnabledGranted(false);
    form.startDisplay();
  }

  @Override
  protected void execPageDeactivated() throws ProcessingException {
    if (form != null) {
      form.doClose();
      form = null;
    }
  }
}

  public void startDisplay() throws ProcessingException {
    startInternal(new DisplayHandler());
  }

  public class DisplayHandler extends AbstractFormHandler {
    @Override
    public void execLoad() throws ProcessingException {
      ITabbedProcessService service = SERVICES.getService(ITabbedProcessService.class);
      TabbedFormData formData = new TabbedFormData();
      exportFormData(formData);
      formData = service.load(formData);
      importFormData(formData);
      setEnabledPermission(new ReadTabbedPermission());
    }
  }

  @Override
  protected void execPageDataLoaded() throws ProcessingException {
    if (form != null) {
      form.refreshForm();
    }
  }

  public void refreshForm() throws ProcessingException {
    ITabbedProcessService service = SERVICES.getService(ITabbedProcessService.class);
    TabbedFormData formData = new TabbedFormData();
    exportFormData(formData);
    formData = service.load(formData);
    importFormData(formData);
    setEnabledPermission(new ReadTabbedPermission());
  }

  public class DisplayHandler extends AbstractFormHandler {
    @Override
    public void execLoad() throws ProcessingException {
      refreshForm();
    }
  }

formData = service.load(formData)

  public void refreshForm() throws ProcessingException {
    ITabbedProcessService service = SERVICES.getService(ITabbedProcessService.class);
    TabbedFormData formData = new TabbedFormData();
    exportFormData(formData);
    formData = service.load(formData); // server exception is thrown when executing this line
    importFormData(formData);
    setEnabledPermission(new ReadTabbedPermission());
  }

  private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
    s.defaultReadObject();
    //verify if valueSet and the type of the value are valid and consistent
    if (!isValueSet()) {
      m_value = null;
    }
    if (m_value == null) {
      return;
    }
    if (!getHolderType().isAssignableFrom(m_value.getClass())) {
      throw new SecurityException("value is of inconsistent type; potential value corruption attack");
    }
  }

    ITabbedProcessService service = SERVICES.getService(ITabbedProcessService.class);
    TabbedFormData formData = new TabbedFormData();
    exportFormData(formData);
    formData = service.load(formData);
    importFormData(formData);
    setEnabledPermission(new ReadTabbedPermission());

  @Override
  protected Date validateValueInternal(Date rawValue) throws ProcessingException {
    //legacy support
    Object legacyValue = rawValue;
    if (legacyValue instanceof Number) {
      rawValue = DateUtility.convertDoubleTimeToDate((Number) legacyValue);
    }
    Date validValue = null;
    rawValue = super.validateValueInternal(rawValue);
    try {
      // apply format
      DateFormat df = getDateFormat();
      rawValue = df.parse(df.format(rawValue));   --> this line converts rawValue from UTCDate to Date!!!
    }
    catch (Throwable t) {
      // nop, take raw value
    }
    validValue = rawValue;
    return validValue;
  }