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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 com.android.launcher3.util;
import java.util.Arrays;
/**
* A wrapper over IntArray implementing a growing set of int primitives.
*/
public class IntSet {
final IntArray mArray = new IntArray();
/**
* Appends the specified value to the set if it does not exist.
*/
public void add(int value) {
int index = Arrays.binarySearch(mArray.mValues, 0, mArray.mSize, value);
if (index < 0) {
mArray.add(-index - 1, value);
}
}
public boolean contains(int value) {
return Arrays.binarySearch(mArray.mValues, 0, mArray.mSize, value) >= 0;
}
public boolean isEmpty() {
return mArray.isEmpty();
}
/**
* Returns the number of values in this set.
*/
public int size() {
return mArray.size();
}
public void clear() {
mArray.clear();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
return (obj instanceof IntSet) && ((IntSet) obj).mArray.equals(mArray);
}
public IntArray getArray() {
return mArray;
}
/**
* Sets this set to be same as {@param other}
*/
public void copyFrom(IntSet other) {
mArray.copyFrom(other.mArray);
}
public static IntSet wrap(IntArray array) {
IntSet set = new IntSet();
set.mArray.addAll(array);
Arrays.sort(set.mArray.mValues, 0, set.mArray.mSize);
return set;
}
}
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