@Override
public boolean checkIfStudentGroupIsEmpty(Attends attend, StudentGroup studentGroup) {
final Collection allStudentGroupAttends = studentGroup.getAttendsSet();
if (allStudentGroupAttends.size() == 1 && allStudentGroupAttends.contains(attend)) {
return true;
}
return false;
}
@Override
public boolean checkAlreadyEnroled(Grouping grouping, String studentUsername) {
final Attends studentAttend = grouping.getStudentAttend(studentUsername);
if (studentAttend != null) {
Collection<StudentGroup> groupingStudentGroups = grouping.getStudentGroupsSet();
for (final StudentGroup studentGroup : groupingStudentGroups) {
Collection<Attends> studentGroupAttends = studentGroup.getAttendsSet();
for (final Attends attend : studentGroupAttends) {
if (attend == studentAttend) {
return true;
}
}
}
}
return false;
}
@Override
public boolean checkPossibleToEnrolInExistingGroup(Grouping grouping, StudentGroup studentGroup) {
final int numberOfElements = studentGroup.getAttendsSet().size();
final Integer maximumCapacity = grouping.getMaximumCapacity();
if (maximumCapacity == null) {
return true;
}
if (numberOfElements < maximumCapacity) {
return true;
}
return false;
}