1 /* 2 * Copyright (C) 2017 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 package com.android.car; 17 18 import android.util.Pair; 19 import android.util.SparseArray; 20 import java.util.stream.IntStream; 21 import java.util.stream.Stream; 22 23 /** 24 * Helper class that provides Stream abstractions for android.util.SparseArray 25 */ 26 public class SparseArrayStream { 27 public static <E> IntStream keyStream(SparseArray<E> array) { 28 return IntStream.range(0, array.size()).map(array::keyAt); 29 } 30 31 public static <E> Stream<E> valueStream(SparseArray<E> array) { 32 return IntStream.range(0, array.size()).mapToObj(array::valueAt); 33 } 34 35 public static <E> Stream<Pair<Integer, E>> pairStream(SparseArray<E> array) { 36 return IntStream.range(0, array.size()).mapToObj( 37 i -> new Pair<>(array.keyAt(i), array.valueAt(i))); 38 } 39 } 40
