@Checked("RolePredicates.STUDENT_PREDICATE")
@Service
public static Boolean run(Integer studentGroupCode, String username)
throws FenixServiceException {
final StudentGroup studentGroup = rootDomainObject.readStudentGroupByOID(studentGroupCode);
if (studentGroup == null) {
throw new InvalidArgumentsServiceException();
}
final Registration registration = Registration.readByUsername(username);
if (registration == null) {
throw new InvalidArgumentsServiceException();
}
final Grouping grouping = studentGroup.getGrouping();
final Attends studentAttend = grouping.getStudentAttend(registration);
if (studentAttend == null) {
throw new NotAuthorizedException();
}
if (studentGroup.getAttends().contains(studentAttend)) {
throw new InvalidSituationServiceException();
}
final IGroupEnrolmentStrategyFactory enrolmentGroupPolicyStrategyFactory =
GroupEnrolmentStrategyFactory.getInstance();
final IGroupEnrolmentStrategy strategy =
enrolmentGroupPolicyStrategyFactory.getGroupEnrolmentStrategyInstance(grouping);
boolean result = strategy.checkPossibleToEnrolInExistingGroup(grouping, studentGroup);
if (!result) {
throw new InvalidArgumentsServiceException();
}
checkIfStudentIsNotEnrolledInOtherGroups(
grouping.getStudentGroups(), studentGroup, studentAttend);
studentGroup.addAttends(studentAttend);
informStudents(studentGroup, registration, grouping);
return Boolean.TRUE;
}
