| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package android.util; |
| |
| /** |
| * A sparse array of ArraySets, which is suitable to hold userid->packages association. |
| * |
| * @hide |
| */ |
| public class SparseSetArray<T> { |
| private final SparseArray<ArraySet<T>> mData = new SparseArray<>(); |
| |
| public SparseSetArray() { |
| } |
| |
| /** |
| * Add a value at index n. |
| * @return FALSE when the value already existed at the given index, TRUE otherwise. |
| */ |
| public boolean add(int n, T value) { |
| ArraySet<T> set = mData.get(n); |
| if (set == null) { |
| set = new ArraySet<>(); |
| mData.put(n, set); |
| } |
| if (set.contains(value)) { |
| return true; |
| } |
| set.add(value); |
| return false; |
| } |
| |
| /** |
| * @return whether a value exists at index n. |
| */ |
| public boolean contains(int n, T value) { |
| final ArraySet<T> set = mData.get(n); |
| if (set == null) { |
| return false; |
| } |
| return set.contains(value); |
| } |
| |
| /** |
| * Remove a value from index n. |
| * @return TRUE when the value existed at the given index and removed, FALSE otherwise. |
| */ |
| public boolean remove(int n, T value) { |
| final ArraySet<T> set = mData.get(n); |
| if (set == null) { |
| return false; |
| } |
| final boolean ret = set.remove(value); |
| if (set.size() == 0) { |
| mData.remove(n); |
| } |
| return ret; |
| } |
| |
| /** |
| * Remove all values from index n. |
| */ |
| public void remove(int n) { |
| mData.remove(n); |
| } |
| public int size() { |
| return mData.size(); |
| } |
| |
| public int keyAt(int index) { |
| return mData.keyAt(index); |
| } |
| |
| public int sizeAt(int index) { |
| final ArraySet<T> set = mData.valueAt(index); |
| if (set == null) { |
| return 0; |
| } |
| return set.size(); |
| } |
| |
| public T valueAt(int intIndex, int valueIndex) { |
| return mData.valueAt(intIndex).valueAt(valueIndex); |
| } |
| } |