// If keys are locked, we can share the same keys.
public TDoubleMap<T> copy() {
TDoubleMap<T> newMap = new TDoubleMap<T>(keyFunc);
newMap.mapType = mapType;
newMap.locked = locked;
newMap.num = num;
newMap.keys = locked ? keys : (T[]) keys.clone(); // Share keys! CHECKED
newMap.values = values.clone();
return newMap;
}
// Return a map with only keys in the set
public TDoubleMap<T> restrict(Set<T> set) {
TDoubleMap<T> newMap = new TDoubleMap<T>(keyFunc);
newMap.mapType = mapType;
if (mapType == MapType.SORTED_LIST) {
allocate(getCapacity(num, false));
for (int i = 0; i < keys.length; i++) {
if (set.contains(keys[i])) {
newMap.keys[newMap.num] = keys[i];
newMap.values[newMap.num] = values[i];
newMap.num++;
}
}
} else if (mapType == MapType.HASH_TABLE) {
for (int i = 0; i < keys.length; i++)
if (keys[i] != null && set.contains(keys[i])) newMap.put(keys[i], values[i]);
}
newMap.locked = locked;
return newMap;
}
