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/*
* 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;
}
/**
* Removes all mappings from this SparseSetArray.
*/
public void clear() {
mData.clear();
}
/**
* @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);
}
/**
* @return the set of items at index n
*/
public ArraySet<T> get(int n) {
return mData.get(n);
}
/**
* 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);
}
}
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