@Override
public int compare(SISView arg0, SISView arg1) {
String t1 = arg0.getDisplayableTitle();
String t2 = arg1.getDisplayableTitle();
if (t1 == null) t1 = "";
if (t2 == null) t2 = "";
return comparator.compare(t1, t2);
}
@Override
public int compareTo(CriteriaLevel o) {
if (o == null) return 1;
else return comparator.compare(code, o.getCode());
}