@Override
  protected boolean validateFormLogic(UserRequest ureq) {
    boolean allOk = true;

    if (withScore) {
      if (applyToAllEl.isAtLeastSelected(1)) {
        allOk &= validateScore(groupScoreEl);
      } else {
        List<AssessmentRow> rows = model.getObjects();
        for (AssessmentRow row : rows) {
          allOk &= validateScore(row.getScoreEl());
        }
      }
    }

    return allOk & super.validateFormLogic(ureq);
  }
  private void applyChanges(boolean setAsDone) {
    List<AssessmentRow> rows = model.getObjects();
    ICourse course = CourseFactory.loadCourse(courseEnv.getCourseResourceableId());
    if (applyToAllEl.isAtLeastSelected(1)) {
      Float score = null;

      if (withScore) {
        String scoreValue = groupScoreEl.getValue();
        if (StringHelper.containsNonWhitespace(scoreValue)) {
          score = Float.parseFloat(scoreValue);
        }
      }

      Boolean passed = null;
      if (withPassed) {
        if (cutValue == null) {
          passed = groupPassedEl.isSelected(0);
        } else if (score != null) {
          passed = (score.floatValue() >= cutValue.floatValue()) ? Boolean.TRUE : Boolean.FALSE;
        }
      }

      for (AssessmentRow row : rows) {
        UserCourseEnvironment userCourseEnv = row.getUserCourseEnvironment(course);
        ScoreEvaluation newScoreEval;
        if (setAsDone) {
          newScoreEval = new ScoreEvaluation(score, passed, AssessmentEntryStatus.done, true, null);
        } else {
          newScoreEval = new ScoreEvaluation(score, passed);
        }
        gtaNode.updateUserScoreEvaluation(newScoreEval, userCourseEnv, getIdentity(), false);
      }

      if (withComment) {
        String comment = groupCommentEl.getValue();
        if (StringHelper.containsNonWhitespace(comment)) {
          for (AssessmentRow row : rows) {
            UserCourseEnvironment userCourseEnv = row.getUserCourseEnvironment(course);
            gtaNode.updateUserUserComment(comment, userCourseEnv, getIdentity());
          }
        }
      }

    } else {
      for (AssessmentRow row : rows) {
        UserCourseEnvironment userCourseEnv = row.getUserCourseEnvironment(course);

        Float score = null;
        if (withScore) {
          String value = row.getScoreEl().getValue();
          if (StringHelper.containsNonWhitespace(value)) {
            score = Float.parseFloat(value);
          }
        }

        Boolean passed = null;
        if (withPassed) {
          if (cutValue == null) {
            passed = row.getPassedEl().isSelected(0);
          } else if (score != null) {
            passed = (score.floatValue() >= cutValue.floatValue()) ? Boolean.TRUE : Boolean.FALSE;
          }
        }

        ScoreEvaluation newScoreEval;
        if (setAsDone) {
          newScoreEval = new ScoreEvaluation(score, passed, AssessmentEntryStatus.done, true, null);
        } else {
          newScoreEval = new ScoreEvaluation(score, passed);
        }
        gtaNode.updateUserScoreEvaluation(newScoreEval, userCourseEnv, getIdentity(), false);

        if (withComment) {
          String comment = row.getComment();
          if (StringHelper.containsNonWhitespace(comment)) {
            gtaNode.updateUserUserComment(comment, userCourseEnv, getIdentity());
          }
        }
      }
    }
  }
  /** @return True if all results are the same */
  private ModelInfos loadModel() {
    // load participants, load datas
    ICourse course = CourseFactory.loadCourse(courseEnv.getCourseResourceableId());
    List<Identity> identities =
        businessGroupService.getMembers(assessedGroup, GroupRoles.participant.name());

    Map<Identity, AssessmentEntry> identityToEntryMap = new HashMap<>();
    List<AssessmentEntry> entries =
        course
            .getCourseEnvironment()
            .getAssessmentManager()
            .getAssessmentEntries(assessedGroup, gtaNode);
    for (AssessmentEntry entry : entries) {
      identityToEntryMap.put(entry.getIdentity(), entry);
    }

    int count = 0;
    boolean same = true;
    StringBuilder duplicateWarning = new StringBuilder();
    Float scoreRef = null;
    Boolean passedRef = null;
    String commentRef = null;

    List<AssessmentRow> rows = new ArrayList<>(identities.size());
    for (Identity identity : identities) {
      AssessmentEntry entry = identityToEntryMap.get(identity);

      ScoreEvaluation scoreEval = null;
      if (withScore || withPassed) {
        scoreEval = gtaNode.getUserScoreEvaluation(entry);
        if (scoreEval == null) {
          scoreEval = ScoreEvaluation.EMPTY_EVALUATION;
        }
      }

      String comment = null;
      if (withComment && entry != null) {
        comment = entry.getComment();
      }

      boolean duplicate = duplicateMemberKeys.contains(identity.getKey());
      if (duplicate) {
        if (duplicateWarning.length() > 0) duplicateWarning.append(", ");
        duplicateWarning.append(StringHelper.escapeHtml(userManager.getUserDisplayName(identity)));
      }

      AssessmentRow row = new AssessmentRow(identity, duplicate);
      rows.add(row);

      if (withScore) {
        Float score = scoreEval.getScore();
        String pointVal = AssessmentHelper.getRoundedScore(score);
        TextElement pointEl = uifactory.addTextElement("point" + count, null, 5, pointVal, flc);
        pointEl.setDisplaySize(5);
        row.setScoreEl(pointEl);
        if (count == 0) {
          scoreRef = score;
        } else if (!same(scoreRef, score)) {
          same = false;
        }
      }

      if (withPassed && cutValue == null) {
        Boolean passed = scoreEval.getPassed();
        MultipleSelectionElement passedEl =
            uifactory.addCheckboxesHorizontal("check" + count, null, flc, onKeys, onValues);
        if (passed != null && passed.booleanValue()) {
          passedEl.select(onKeys[0], passed.booleanValue());
        }
        row.setPassedEl(passedEl);
        if (count == 0) {
          passedRef = passed;
        } else if (!same(passedRef, passed)) {
          same = false;
        }
      }

      if (withComment) {
        FormLink commentLink =
            uifactory.addFormLink(
                "comment-" + CodeHelper.getRAMUniqueID(),
                "comment",
                "comment",
                null,
                flc,
                Link.LINK);
        if (StringHelper.containsNonWhitespace(comment)) {
          commentLink.setIconLeftCSS("o_icon o_icon_comments");
        } else {
          commentLink.setIconLeftCSS("o_icon o_icon_comments_none");
        }
        commentLink.setUserObject(row);
        row.setComment(comment);
        row.setCommentEditLink(commentLink);

        if (count == 0) {
          commentRef = comment;
        } else if (!same(commentRef, comment)) {
          same = false;
        }
      }

      count++;
    }

    model.setObjects(rows);
    table.reset();

    return new ModelInfos(same, scoreRef, passedRef, commentRef, duplicateWarning.toString());
  }