19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage com.android.internal.util; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1959d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkeyimport android.annotation.NonNull; 2059d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkeyimport android.annotation.Nullable; 21da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkeyimport android.util.ArraySet; 22da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey 23776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinskiimport dalvik.system.VMRuntime; 24da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey 25776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinskiimport libcore.util.EmptyArray; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 27776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinskiimport java.lang.reflect.Array; 28da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkeyimport java.util.ArrayList; 2959d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkeyimport java.util.Objects; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * ArrayUtils contains some methods that you can call to find out 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the most efficient increments by which to grow arrays. 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3559d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkeypublic class ArrayUtils { 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int CACHE_SIZE = 73; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static Object[] sCache = new Object[CACHE_SIZE]; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ArrayUtils() { /* cannot be instantiated */ } 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 41776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski public static byte[] newUnpaddedByteArray(int minLen) { 42776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (byte[])VMRuntime.getRuntime().newUnpaddedArray(byte.class, minLen); 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 45776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski public static char[] newUnpaddedCharArray(int minLen) { 46776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (char[])VMRuntime.getRuntime().newUnpaddedArray(char.class, minLen); 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 49776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski public static int[] newUnpaddedIntArray(int minLen) { 50776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (int[])VMRuntime.getRuntime().newUnpaddedArray(int.class, minLen); 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 53776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski public static boolean[] newUnpaddedBooleanArray(int minLen) { 54776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (boolean[])VMRuntime.getRuntime().newUnpaddedArray(boolean.class, minLen); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 57776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski public static long[] newUnpaddedLongArray(int minLen) { 58776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (long[])VMRuntime.getRuntime().newUnpaddedArray(long.class, minLen); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 61776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski public static float[] newUnpaddedFloatArray(int minLen) { 62776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (float[])VMRuntime.getRuntime().newUnpaddedArray(float.class, minLen); 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 65776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski public static Object[] newUnpaddedObjectArray(int minLen) { 66776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (Object[])VMRuntime.getRuntime().newUnpaddedArray(Object.class, minLen); 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 69776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski @SuppressWarnings("unchecked") 70776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski public static <T> T[] newUnpaddedArray(Class<T> clazz, int minLen) { 71776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (T[])VMRuntime.getRuntime().newUnpaddedArray(clazz, minLen); 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Checks if the beginnings of two byte arrays are equal. 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param array1 the first byte array 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param array2 the second byte array 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param length the number of bytes to check 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if they're equal, false otherwise 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static boolean equals(byte[] array1, byte[] array2, int length) { 83fc054349089563699349c161011f378c67d15587Christopher Tate if (length < 0) { 84fc054349089563699349c161011f378c67d15587Christopher Tate throw new IllegalArgumentException(); 85fc054349089563699349c161011f378c67d15587Christopher Tate } 86fc054349089563699349c161011f378c67d15587Christopher Tate 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (array1 == array2) { 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (array1 == null || array2 == null || array1.length < length || array2.length < length) { 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < length; i++) { 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (array1[i] != array2[i]) { 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns an empty array of the specified type. The intent is that 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * it will return the same empty array every time to avoid reallocation, 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * although this is not guaranteed. 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 106776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski @SuppressWarnings("unchecked") 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static <T> T[] emptyArray(Class<T> kind) { 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (kind == Object.class) { 109776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski return (T[]) EmptyArray.OBJECT; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 112b4e5061fd6e0b665e025713643378ec31188cff2Mathieu Chartier int bucket = (kind.hashCode() & 0x7FFFFFFF) % CACHE_SIZE; 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Object cache = sCache[bucket]; 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (cache == null || cache.getClass().getComponentType() != kind) { 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cache = Array.newInstance(kind, 0); 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sCache[bucket] = cache; 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Log.e("cache", "new empty " + kind.getName() + " at " + bucket); 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (T[]) cache; 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1263a44f3f1b446315ef894e01d2ab9b5388c2bd8c4Jeff Sharkey * Checks if given array is null or has zero elements. 1273a44f3f1b446315ef894e01d2ab9b5388c2bd8c4Jeff Sharkey */ 1283a44f3f1b446315ef894e01d2ab9b5388c2bd8c4Jeff Sharkey public static <T> boolean isEmpty(T[] array) { 1293a44f3f1b446315ef894e01d2ab9b5388c2bd8c4Jeff Sharkey return array == null || array.length == 0; 1303a44f3f1b446315ef894e01d2ab9b5388c2bd8c4Jeff Sharkey } 1313a44f3f1b446315ef894e01d2ab9b5388c2bd8c4Jeff Sharkey 1323a44f3f1b446315ef894e01d2ab9b5388c2bd8c4Jeff Sharkey /** 1333256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey * Checks if given array is null or has zero elements. 1343256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey */ 1353256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey public static boolean isEmpty(int[] array) { 1363256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey return array == null || array.length == 0; 1373256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey } 1383256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey 1393256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey /** 1403256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey * Checks if given array is null or has zero elements. 1413256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey */ 1423256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey public static boolean isEmpty(long[] array) { 1433256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey return array == null || array.length == 0; 1443256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey } 1453256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey 1463256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey /** 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Checks that value is present as at least one of the elements of the array. 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param array the array to check in 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param value the value to check for 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if the value is present in the array 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static <T> boolean contains(T[] array, T value) { 15394c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey return indexOf(array, value) != -1; 15494c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey } 15594c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey 15694c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey /** 15794c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey * Return first index of {@code value} in {@code array}, or {@code -1} if 15894c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey * not found. 15994c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey */ 16094c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey public static <T> int indexOf(T[] array, T value) { 16157dcf5b177b56195421535938544f32d8b591b42Jeff Sharkey if (array == null) return -1; 16294c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey for (int i = 0; i < array.length; i++) { 16359d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey if (Objects.equals(array[i], value)) return i; 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 16594c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey return -1; 16694c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey } 16794c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey 16894c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey /** 16994c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey * Test if all {@code check} items are contained in {@code array}. 17094c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey */ 17194c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey public static <T> boolean containsAll(T[] array, T[] check) { 1723256601f5e4d94713f59e97b9d4912875c1bdcafJeff Sharkey if (check == null) return true; 17394c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey for (T checkItem : check) { 17494c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey if (!contains(array, checkItem)) { 17594c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey return false; 17694c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey } 17794c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey } 17894c91dca55de9ffdbe072fcc5dd6dbf1efe5e4c1Jeff Sharkey return true; 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 180630a1712168f402653039e368259cb9480454fa8Jeff Sharkey 181630a1712168f402653039e368259cb9480454fa8Jeff Sharkey public static boolean contains(int[] array, int value) { 18257dcf5b177b56195421535938544f32d8b591b42Jeff Sharkey if (array == null) return false; 183630a1712168f402653039e368259cb9480454fa8Jeff Sharkey for (int element : array) { 184630a1712168f402653039e368259cb9480454fa8Jeff Sharkey if (element == value) { 185630a1712168f402653039e368259cb9480454fa8Jeff Sharkey return true; 186630a1712168f402653039e368259cb9480454fa8Jeff Sharkey } 187630a1712168f402653039e368259cb9480454fa8Jeff Sharkey } 188630a1712168f402653039e368259cb9480454fa8Jeff Sharkey return false; 189630a1712168f402653039e368259cb9480454fa8Jeff Sharkey } 19096e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown 191874d0d4032dc940327a81359f144d38d3cb580a3dcashman public static boolean contains(long[] array, long value) { 19257dcf5b177b56195421535938544f32d8b591b42Jeff Sharkey if (array == null) return false; 193874d0d4032dc940327a81359f144d38d3cb580a3dcashman for (long element : array) { 194874d0d4032dc940327a81359f144d38d3cb580a3dcashman if (element == value) { 195874d0d4032dc940327a81359f144d38d3cb580a3dcashman return true; 196874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 197874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 198874d0d4032dc940327a81359f144d38d3cb580a3dcashman return false; 199874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 200874d0d4032dc940327a81359f144d38d3cb580a3dcashman 20163abc37356728c0575d6a62a203102ae6d97953bJeff Sharkey public static long total(long[] array) { 20263abc37356728c0575d6a62a203102ae6d97953bJeff Sharkey long total = 0; 20363abc37356728c0575d6a62a203102ae6d97953bJeff Sharkey for (long value : array) { 20463abc37356728c0575d6a62a203102ae6d97953bJeff Sharkey total += value; 20563abc37356728c0575d6a62a203102ae6d97953bJeff Sharkey } 20663abc37356728c0575d6a62a203102ae6d97953bJeff Sharkey return total; 20763abc37356728c0575d6a62a203102ae6d97953bJeff Sharkey } 20863abc37356728c0575d6a62a203102ae6d97953bJeff Sharkey 20996e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown /** 21059d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * Adds value to given array if not already present, providing set-like 21159d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * behavior. 21296e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown */ 21396e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown @SuppressWarnings("unchecked") 21459d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey public static @NonNull <T> T[] appendElement(Class<T> kind, @Nullable T[] array, T element) { 21596e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown final T[] result; 21696e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown final int end; 21796e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown if (array != null) { 21859d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey if (contains(array, element)) return array; 21996e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown end = array.length; 22096e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown result = (T[])Array.newInstance(kind, end + 1); 22196e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown System.arraycopy(array, 0, result, 0, end); 22296e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown } else { 22396e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown end = 0; 22496e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown result = (T[])Array.newInstance(kind, 1); 22596e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown } 22696e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown result[end] = element; 22796e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown return result; 22896e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown } 22996e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown 23096e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown /** 23159d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * Removes value from given array if present, providing set-like behavior. 23296e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown */ 23396e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown @SuppressWarnings("unchecked") 23459d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey public static @Nullable <T> T[] removeElement(Class<T> kind, @Nullable T[] array, T element) { 23596e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown if (array != null) { 23659d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey if (!contains(array, element)) return array; 23796e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown final int length = array.length; 23896e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown for (int i = 0; i < length; i++) { 23959d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey if (Objects.equals(array[i], element)) { 24096e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown if (length == 1) { 24196e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown return null; 24296e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown } 24396e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown T[] result = (T[])Array.newInstance(kind, length - 1); 24496e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown System.arraycopy(array, 0, result, 0, i); 24596e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown System.arraycopy(array, i + 1, result, i, length - i - 1); 24696e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown return result; 24796e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown } 24896e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown } 24996e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown } 25096e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown return array; 25196e942dabeeaaa9ab6df3a870668c6fe53d930daJeff Brown } 252854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey 253874d0d4032dc940327a81359f144d38d3cb580a3dcashman /** 25459d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * Adds value to given array if not already present, providing set-like 25559d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * behavior. 256874d0d4032dc940327a81359f144d38d3cb580a3dcashman */ 25759d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey public static @NonNull int[] appendInt(@Nullable int[] cur, int val) { 258854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey if (cur == null) { 259854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey return new int[] { val }; 260854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 261854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey final int N = cur.length; 262854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey for (int i = 0; i < N; i++) { 263854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey if (cur[i] == val) { 264854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey return cur; 265854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 266854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 267854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey int[] ret = new int[N + 1]; 268854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey System.arraycopy(cur, 0, ret, 0, N); 269854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey ret[N] = val; 270854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey return ret; 271854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 272854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey 27359d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey /** 27459d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * Removes value from given array if present, providing set-like behavior. 27559d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey */ 27659d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey public static @Nullable int[] removeInt(@Nullable int[] cur, int val) { 277854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey if (cur == null) { 278854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey return null; 279854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 280854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey final int N = cur.length; 281854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey for (int i = 0; i < N; i++) { 282854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey if (cur[i] == val) { 283854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey int[] ret = new int[N - 1]; 284854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey if (i > 0) { 285854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey System.arraycopy(cur, 0, ret, 0, i); 286854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 287854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey if (i < (N - 1)) { 288854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey System.arraycopy(cur, i + 1, ret, i, N - i - 1); 289854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 290854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey return ret; 291854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 292854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 293854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey return cur; 294854b2b1670bda1eeb87a14b7ac3d222024f0aad6Jeff Sharkey } 295874d0d4032dc940327a81359f144d38d3cb580a3dcashman 296874d0d4032dc940327a81359f144d38d3cb580a3dcashman /** 29752153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov * Removes value from given array if present, providing set-like behavior. 29852153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov */ 29952153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov public static @Nullable String[] removeString(@Nullable String[] cur, String val) { 30052153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov if (cur == null) { 30152153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov return null; 30252153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov } 30352153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov final int N = cur.length; 30452153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov for (int i = 0; i < N; i++) { 30552153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov if (Objects.equals(cur[i], val)) { 30652153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov String[] ret = new String[N - 1]; 30752153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov if (i > 0) { 30852153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov System.arraycopy(cur, 0, ret, 0, i); 30952153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov } 31052153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov if (i < (N - 1)) { 31152153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov System.arraycopy(cur, i + 1, ret, i, N - i - 1); 31252153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov } 31352153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov return ret; 31452153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov } 31552153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov } 31652153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov return cur; 31752153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov } 31852153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov 31952153f4c0540a991b5b7214f4f14b5a891479a3cSvet Ganov /** 32059d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * Adds value to given array if not already present, providing set-like 32159d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * behavior. 322874d0d4032dc940327a81359f144d38d3cb580a3dcashman */ 32359d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey public static @NonNull long[] appendLong(@Nullable long[] cur, long val) { 324874d0d4032dc940327a81359f144d38d3cb580a3dcashman if (cur == null) { 325874d0d4032dc940327a81359f144d38d3cb580a3dcashman return new long[] { val }; 326874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 327874d0d4032dc940327a81359f144d38d3cb580a3dcashman final int N = cur.length; 328874d0d4032dc940327a81359f144d38d3cb580a3dcashman for (int i = 0; i < N; i++) { 329874d0d4032dc940327a81359f144d38d3cb580a3dcashman if (cur[i] == val) { 330874d0d4032dc940327a81359f144d38d3cb580a3dcashman return cur; 331874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 332874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 333874d0d4032dc940327a81359f144d38d3cb580a3dcashman long[] ret = new long[N + 1]; 334874d0d4032dc940327a81359f144d38d3cb580a3dcashman System.arraycopy(cur, 0, ret, 0, N); 335874d0d4032dc940327a81359f144d38d3cb580a3dcashman ret[N] = val; 336874d0d4032dc940327a81359f144d38d3cb580a3dcashman return ret; 337874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 338874d0d4032dc940327a81359f144d38d3cb580a3dcashman 33959d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey /** 34059d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey * Removes value from given array if present, providing set-like behavior. 34159d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey */ 34259d577a518333f4b4514315b6d10e8dba160abcdJeff Sharkey public static @Nullable long[] removeLong(@Nullable long[] cur, long val) { 343874d0d4032dc940327a81359f144d38d3cb580a3dcashman if (cur == null) { 344874d0d4032dc940327a81359f144d38d3cb580a3dcashman return null; 345874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 346874d0d4032dc940327a81359f144d38d3cb580a3dcashman final int N = cur.length; 347874d0d4032dc940327a81359f144d38d3cb580a3dcashman for (int i = 0; i < N; i++) { 348874d0d4032dc940327a81359f144d38d3cb580a3dcashman if (cur[i] == val) { 349874d0d4032dc940327a81359f144d38d3cb580a3dcashman long[] ret = new long[N - 1]; 350874d0d4032dc940327a81359f144d38d3cb580a3dcashman if (i > 0) { 351874d0d4032dc940327a81359f144d38d3cb580a3dcashman System.arraycopy(cur, 0, ret, 0, i); 352874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 353874d0d4032dc940327a81359f144d38d3cb580a3dcashman if (i < (N - 1)) { 354874d0d4032dc940327a81359f144d38d3cb580a3dcashman System.arraycopy(cur, i + 1, ret, i, N - i - 1); 355874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 356874d0d4032dc940327a81359f144d38d3cb580a3dcashman return ret; 357874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 358874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 359874d0d4032dc940327a81359f144d38d3cb580a3dcashman return cur; 360874d0d4032dc940327a81359f144d38d3cb580a3dcashman } 36157dcf5b177b56195421535938544f32d8b591b42Jeff Sharkey 36257dcf5b177b56195421535938544f32d8b591b42Jeff Sharkey public static long[] cloneOrNull(long[] array) { 36357dcf5b177b56195421535938544f32d8b591b42Jeff Sharkey return (array != null) ? array.clone() : null; 36457dcf5b177b56195421535938544f32d8b591b42Jeff Sharkey } 365da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey 366da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey public static <T> ArraySet<T> add(ArraySet<T> cur, T val) { 367da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey if (cur == null) { 368da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey cur = new ArraySet<>(); 369da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 370da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey cur.add(val); 371da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return cur; 372da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 373da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey 374da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey public static <T> ArraySet<T> remove(ArraySet<T> cur, T val) { 375da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey if (cur == null) { 376da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return null; 377da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 378da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey cur.remove(val); 379da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey if (cur.isEmpty()) { 380da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return null; 381da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } else { 382da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return cur; 383da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 384da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 385da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey 386da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey public static <T> boolean contains(ArraySet<T> cur, T val) { 387da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return (cur != null) ? cur.contains(val) : false; 388da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 389da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey 390da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey public static <T> ArrayList<T> add(ArrayList<T> cur, T val) { 391da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey if (cur == null) { 392da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey cur = new ArrayList<>(); 393da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 394da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey cur.add(val); 395da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return cur; 396da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 397da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey 398da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey public static <T> ArrayList<T> remove(ArrayList<T> cur, T val) { 399da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey if (cur == null) { 400da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return null; 401da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 402da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey cur.remove(val); 403da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey if (cur.isEmpty()) { 404da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return null; 405da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } else { 406da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return cur; 407da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 408da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 409da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey 410da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey public static <T> boolean contains(ArrayList<T> cur, T val) { 411da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey return (cur != null) ? cur.contains(val) : false; 412da96e137bcc8191c584ada7b5de31eaae92f244fJeff Sharkey } 41372478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski 41472478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski /** 41572478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski * Returns true if the two ArrayLists are equal with respect to the objects they contain. 41672478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski * The objects must be in the same order and be reference equal (== not .equals()). 41772478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski */ 41872478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski public static <T> boolean referenceEquals(ArrayList<T> a, ArrayList<T> b) { 41972478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski if (a == b) { 42072478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski return true; 42172478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski } 42272478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski 42372478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski final int sizeA = a.size(); 42472478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski final int sizeB = b.size(); 42572478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski if (a == null || b == null || sizeA != sizeB) { 42672478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski return false; 42772478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski } 42872478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski 42972478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski boolean diff = false; 43072478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski for (int i = 0; i < sizeA && !diff; i++) { 43172478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski diff |= a.get(i) != b.get(i); 43272478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski } 43372478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski return !diff; 43472478f053f403e29223dba6cc7be9e5bf115f670Adam Lesinski } 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 436