@Override
public boolean add(T o) {
final int hash = hasher.getHashCode(o);
if (!map.containsKey(hash)) {
map.put(hash, o);
super.add(o);
return true;
} else {
return false;
}
}
@Override
public boolean remove(Object o) {
final int hash = hasher.getHashCode(o);
if (map.containsKey(hash)) {
super.remove(map.get(hash));
map.remove(hash);
return true;
} else {
return false;
}
}
@Override
public boolean contains(Object o) {
return map.containsKey(hasher.getHashCode(o));
}