private File getSessionStateFile(final CandidateEvent candidateEvent) {
   final CandidateSession candidateSession = candidateEvent.getCandidateSession();
   final AssessmentObjectType assessmentType =
       candidateSession.getDelivery().getAssessment().getAssessmentType();
   final String stateFileBaseName =
       assessmentType == AssessmentObjectType.ASSESSMENT_ITEM
           ? "itemSessionState"
           : "testSessionState";
   final File sessionFolder = filespaceManager.obtainCandidateSessionStateStore(candidateSession);
   final String stateFileName = stateFileBaseName + candidateEvent.getId() + ".xml";
   return new File(sessionFolder, stateFileName);
 }
  /**
   * Wraps the given {@link ItemSessionState} in a {@link ItemSessionController}.
   *
   * <p>It is assumed that the item was runnable, so this will never return null.
   */
  public ItemSessionController createItemSessionController(
      final CandidateSession candidateSession,
      final ItemSessionState itemSessionState,
      final NotificationRecorder notificationRecorder) {
    final User candidate = candidateSession.getCandidate();
    final Delivery delivery = candidateSession.getDelivery();
    ensureItemDelivery(delivery);
    Assert.notNull(itemSessionState, "itemSessionState");

    /* Try to resolve the underlying JQTI+ object */
    final AssessmentPackage assessmentPackage =
        assessmentDataService.ensureSelectedAssessmentPackage(delivery);
    final ItemProcessingMap itemProcessingMap =
        assessmentObjectManagementService.getItemProcessingMap(assessmentPackage);
    if (itemProcessingMap == null) {
      throw new QtiWorksLogicException("Expected this item to be runnable");
    }

    /* Create config for ItemSessionController */
    final ItemDeliverySettings itemDeliverySettings =
        (ItemDeliverySettings)
            assessmentDataService.getEffectiveDeliverySettings(candidate, delivery);
    final ItemSessionControllerSettings itemSessionControllerSettings =
        new ItemSessionControllerSettings();
    itemSessionControllerSettings.setTemplateProcessingLimit(
        computeTemplateProcessingLimit(itemDeliverySettings));
    itemSessionControllerSettings.setMaxAttempts(itemDeliverySettings.getMaxAttempts());

    /* Create controller and wire up notification recorder (if passed) */
    final ItemSessionController result =
        new ItemSessionController(
            jqtiExtensionManager,
            itemSessionControllerSettings,
            itemProcessingMap,
            itemSessionState);
    if (notificationRecorder != null) {
      result.addNotificationListener(notificationRecorder);
    }

    return result;
  }
  /**
   * Wraps the given {@link TestSessionState} in a {@link TestSessionController}.
   *
   * <p>It is assumed that the test was runnable, so this will never return null.
   */
  public TestSessionController createTestSessionController(
      final CandidateSession candidateSession,
      final TestSessionState testSessionState,
      final NotificationRecorder notificationRecorder) {
    final User candidate = candidateSession.getCandidate();
    final Delivery delivery = candidateSession.getDelivery();
    ensureTestDelivery(delivery);
    Assert.notNull(testSessionState, "testSessionState");

    /* Try to resolve the underlying JQTI+ object */
    final AssessmentPackage assessmentPackage =
        assessmentDataService.ensureSelectedAssessmentPackage(delivery);
    final TestProcessingMap testProcessingMap =
        assessmentObjectManagementService.getTestProcessingMap(assessmentPackage);
    if (testProcessingMap == null) {
      return null;
    }

    /* Create config for TestSessionController */
    final TestDeliverySettings testDeliverySettings =
        (TestDeliverySettings)
            assessmentDataService.getEffectiveDeliverySettings(candidate, delivery);
    final TestSessionControllerSettings testSessionControllerSettings =
        new TestSessionControllerSettings();
    testSessionControllerSettings.setTemplateProcessingLimit(
        computeTemplateProcessingLimit(testDeliverySettings));

    /* Create controller and wire up notification recorder (if passed) */
    final TestSessionController result =
        new TestSessionController(
            jqtiExtensionManager,
            testSessionControllerSettings,
            testProcessingMap,
            testSessionState);
    if (notificationRecorder != null) {
      result.addNotificationListener(notificationRecorder);
    }

    return result;
  }