@Override
public boolean checkStudentsUserNamesInGrouping(
List<String> studentUsernames, Grouping grouping) {
for (final String studentUsername : studentUsernames) {
if (grouping.getStudentAttend(studentUsername) == null) {
return false;
}
}
return true;
}
@Override
public boolean checkNotEnroledInGroup(
Grouping grouping, StudentGroup studentGroup, String studentUsername) {
final Attends studentAttend = grouping.getStudentAttend(studentUsername);
if (studentAttend != null) {
Collection<Attends> studentGroupAttends = studentGroup.getAttendsSet();
for (final Attends attend : studentGroupAttends) {
if (attend == studentAttend) {
return false;
}
}
}
return true;
}
@Override
public boolean checkStudentInGrouping(Grouping grouping, String username) {
final Attends attend = grouping.getStudentAttend(username);
return attend != null;
}