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 17 package com.android.car.obd2.test; 18 19 import java.util.ArrayList; 20 import java.util.Arrays; 21 22 public class Utils { 23 private Utils() {} 24 25 static int[] stringsToIntArray(String... strings) { 26 ArrayList<Integer> arrayList = new ArrayList<>(); 27 for (String string : strings) { 28 string.chars().forEach(arrayList::add); 29 } 30 return arrayList.stream().mapToInt(Integer::intValue).toArray(); 31 } 32 33 static int[] concatIntArrays(int[]... arrays) { 34 // corner and trivial cases 35 if (0 == arrays.length) return new int[] {}; 36 if (1 == arrays.length) return arrays[0]; 37 38 // the general case in its full glory 39 int totalSize = Arrays.stream(arrays).mapToInt((int[] array) -> array.length).sum(); 40 int[] newArray = Arrays.copyOf(arrays[0], totalSize); 41 int usedSize = arrays[0].length; 42 for (int i = 1; i < arrays.length; ++i) { 43 int[] array = arrays[i]; 44 int length = array.length; 45 System.arraycopy(array, 0, newArray, usedSize, length); 46 usedSize += length; 47 } 48 return newArray; 49 } 50 } 51
