/** Returns a set of the UrnSet version of the set. */
public static UrnSet modifiableSet(Set<? extends URN> set) {
if (set instanceof UnmodifiableUrnSet) {
UrnSet urnSet = (UrnSet) set;
return new UrnSet(urnSet.getSHA1(), urnSet.getTTRoot());
}
if (set instanceof UrnSet) {
return (UrnSet) set;
} else {
return new UrnSet(set);
}
}
public UnmodifiableUrnSet(Set<? extends URN> set) {
super.addAll(set);
}