1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.launcher3.util; 18 19 import android.util.SparseArray; 20 21 import java.util.Iterator; 22 import java.util.stream.Stream; 23 import java.util.stream.StreamSupport; 24 25 /** 26 * Extension of {@link SparseArray} with some utility methods. 27 */ 28 public class IntSparseArrayMap<E> extends SparseArray<E> implements Iterable<E> { 29 containsKey(int key)30 public boolean containsKey(int key) { 31 return indexOfKey(key) >= 0; 32 } 33 isEmpty()34 public boolean isEmpty() { 35 return size() <= 0; 36 } 37 38 @Override clone()39 public IntSparseArrayMap<E> clone() { 40 return (IntSparseArrayMap<E>) super.clone(); 41 } 42 43 @Override iterator()44 public Iterator<E> iterator() { 45 return new ValueIterator(); 46 } 47 stream()48 public Stream<E> stream() { 49 return StreamSupport.stream(spliterator(), false); 50 } 51 52 @Thunk class ValueIterator implements Iterator<E> { 53 54 private int mNextIndex = 0; 55 56 @Override hasNext()57 public boolean hasNext() { 58 return mNextIndex < size(); 59 } 60 61 @Override next()62 public E next() { 63 return valueAt(mNextIndex ++); 64 } 65 66 @Override remove()67 public void remove() { 68 throw new UnsupportedOperationException(); 69 } 70 } 71 } 72