@Override
public int compareTo(ChildContainer o) {
// Compare by surname.
int ret = child.getSurname().compareTo(o.getChild().getSurname());
if (ret == 0) {
// Surname is the same, just by firstname.
ret = child.getFirstname().compareTo(o.getChild().getFirstname());
// If still 0, use the id.
if (ret == 0) {
ret = child.getChildid().compareTo(o.getChild().getChildid());
}
}
return ret;
}
