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 23 /** 24 * Extension of {@link SparseArray} with some utility methods. 25 */ 26 public class IntSparseArrayMap<E> extends SparseArray<E> implements Iterable<E> { 27 containsKey(int key)28 public boolean containsKey(int key) { 29 return indexOfKey(key) >= 0; 30 } 31 isEmpty()32 public boolean isEmpty() { 33 return size() <= 0; 34 } 35 36 @Override clone()37 public IntSparseArrayMap<E> clone() { 38 return (IntSparseArrayMap<E>) super.clone(); 39 } 40 41 @Override iterator()42 public Iterator<E> iterator() { 43 return new ValueIterator(); 44 } 45 46 @Thunk class ValueIterator implements Iterator<E> { 47 48 private int mNextIndex = 0; 49 50 @Override hasNext()51 public boolean hasNext() { 52 return mNextIndex < size(); 53 } 54 55 @Override next()56 public E next() { 57 return valueAt(mNextIndex ++); 58 } 59 60 @Override remove()61 public void remove() { 62 throw new UnsupportedOperationException(); 63 } 64 } 65 } 66