1 /* 2 * Copyright (C) 2024 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.inputmethod; 18 19 import android.annotation.AnyThread; 20 import android.annotation.NonNull; 21 import android.annotation.UserIdInt; 22 23 import java.util.function.Consumer; 24 import java.util.function.IntFunction; 25 26 final class UserDataRepository { 27 28 private final Object mMutationLock = new Object(); 29 30 @NonNull 31 private volatile ImmutableSparseArray<UserData> mUserData = ImmutableSparseArray.empty(); 32 33 @NonNull 34 private final IntFunction<InputMethodBindingController> mBindingControllerFactory; 35 @NonNull 36 private final IntFunction<ImeVisibilityStateComputer> mVisibilityStateComputerFactory; 37 38 @AnyThread 39 @NonNull getOrCreate(@serIdInt int userId)40 UserData getOrCreate(@UserIdInt int userId) { 41 // Do optimistic read first for optimization. 42 final var userData = mUserData.get(userId); 43 if (userData != null) { 44 return userData; 45 } 46 // Note that the below line can be called concurrently. Here we assume that 47 // instantiating UserData for the same user multiple times would have no side effect. 48 final var newUserData = new UserData(userId, mBindingControllerFactory.apply(userId), 49 mVisibilityStateComputerFactory.apply(userId)); 50 synchronized (mMutationLock) { 51 mUserData = mUserData.cloneWithPutOrSelf(userId, newUserData); 52 return newUserData; 53 } 54 } 55 56 @AnyThread forAllUserData(Consumer<UserData> consumer)57 void forAllUserData(Consumer<UserData> consumer) { 58 mUserData.forEach(consumer); 59 } 60 UserDataRepository(@onNull IntFunction<InputMethodBindingController> bindingControllerFactory, @NonNull IntFunction<ImeVisibilityStateComputer> visibilityStateComputerFactory)61 UserDataRepository(@NonNull IntFunction<InputMethodBindingController> bindingControllerFactory, 62 @NonNull IntFunction<ImeVisibilityStateComputer> visibilityStateComputerFactory) { 63 mBindingControllerFactory = bindingControllerFactory; 64 mVisibilityStateComputerFactory = visibilityStateComputerFactory; 65 } 66 67 @AnyThread remove(@serIdInt int userId)68 void remove(@UserIdInt int userId) { 69 synchronized (mMutationLock) { 70 mUserData = mUserData.cloneWithRemoveOrSelf(userId); 71 } 72 } 73 } 74