1 /*
<lambda>null2 * Copyright (C) 2021 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.server.permission.access.collection
18
19 typealias IndexedList<T> = ArrayList<T>
20
21 inline fun <T> IndexedList<T>.allIndexed(predicate: (Int, T) -> Boolean): Boolean {
22 forEachIndexed { index, element ->
23 if (!predicate(index, element)) {
24 return false
25 }
26 }
27 return true
28 }
29
anyIndexednull30 inline fun <T> IndexedList<T>.anyIndexed(predicate: (Int, T) -> Boolean): Boolean {
31 forEachIndexed { index, element ->
32 if (predicate(index, element)) {
33 return true
34 }
35 }
36 return false
37 }
38
39 @Suppress("NOTHING_TO_INLINE")
copynull40 inline fun <T> IndexedList<T>.copy(): IndexedList<T> = IndexedList(this)
41
42 inline fun <T> IndexedList<T>.forEachIndexed(action: (Int, T) -> Unit) {
43 for (index in indices) {
44 action(index, this[index])
45 }
46 }
47
forEachReversedIndexednull48 inline fun <T> IndexedList<T>.forEachReversedIndexed(action: (Int, T) -> Unit) {
49 for (index in lastIndex downTo 0) {
50 action(index, this[index])
51 }
52 }
53
54 @Suppress("NOTHING_TO_INLINE")
minusnull55 inline operator fun <T> IndexedList<T>.minus(element: T): IndexedList<T> =
56 copy().apply { this -= element }
57
58 @Suppress("NOTHING_TO_INLINE")
minusAssignnull59 inline operator fun <T> IndexedList<T>.minusAssign(element: T) {
60 remove(element)
61 }
62
noneIndexednull63 inline fun <T> IndexedList<T>.noneIndexed(predicate: (Int, T) -> Boolean): Boolean {
64 forEachIndexed { index, element ->
65 if (predicate(index, element)) {
66 return false
67 }
68 }
69 return true
70 }
71
72 @Suppress("NOTHING_TO_INLINE")
plusnull73 inline operator fun <T> IndexedList<T>.plus(element: T): IndexedList<T> =
74 copy().apply { this += element }
75
76 @Suppress("NOTHING_TO_INLINE")
plusAssignnull77 inline operator fun <T> IndexedList<T>.plusAssign(element: T) {
78 add(element)
79 }
80
removeAllIndexednull81 inline fun <T> IndexedList<T>.removeAllIndexed(predicate: (Int, T) -> Boolean): Boolean {
82 var isChanged = false
83 forEachReversedIndexed { index, element ->
84 if (predicate(index, element)) {
85 removeAt(index)
86 isChanged = true
87 }
88 }
89 return isChanged
90 }
91
retainAllIndexednull92 inline fun <T> IndexedList<T>.retainAllIndexed(predicate: (Int, T) -> Boolean): Boolean {
93 var isChanged = false
94 forEachReversedIndexed { index, element ->
95 if (!predicate(index, element)) {
96 removeAt(index)
97 isChanged = true
98 }
99 }
100 return isChanged
101 }
102
mapNotNullIndexednull103 inline fun <T, R> IndexedList<T>.mapNotNullIndexed(transform: (T) -> R?): IndexedList<R> =
104 IndexedList<R>().also { destination ->
105 forEachIndexed { _, element ->
106 transform(element)?.let { destination += it }
107 }
108 }
109