| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.location.injector; |
| |
| import static com.android.server.location.LocationManagerService.D; |
| import static com.android.server.location.LocationManagerService.TAG; |
| import static com.android.server.location.eventlog.LocationEventLog.EVENT_LOG; |
| import static com.android.server.location.injector.UserInfoHelper.UserListener.CURRENT_USER_CHANGED; |
| import static com.android.server.location.injector.UserInfoHelper.UserListener.USER_STARTED; |
| import static com.android.server.location.injector.UserInfoHelper.UserListener.USER_STOPPED; |
| |
| import android.annotation.IntDef; |
| import android.annotation.UserIdInt; |
| import android.util.IndentingPrintWriter; |
| import android.util.Log; |
| |
| import java.io.FileDescriptor; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.util.Arrays; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| /** |
| * Provides accessors and listeners for all user info. |
| */ |
| public abstract class UserInfoHelper { |
| |
| /** |
| * Listener for current user changes. |
| */ |
| public interface UserListener { |
| |
| int CURRENT_USER_CHANGED = 1; |
| int USER_STARTED = 2; |
| int USER_STOPPED = 3; |
| |
| @IntDef({CURRENT_USER_CHANGED, USER_STARTED, USER_STOPPED}) |
| @Retention(RetentionPolicy.SOURCE) |
| @interface UserChange {} |
| |
| /** |
| * Called when something has changed about the given user. |
| */ |
| void onUserChanged(@UserIdInt int userId, @UserChange int change); |
| } |
| |
| private final CopyOnWriteArrayList<UserListener> mListeners; |
| |
| public UserInfoHelper() { |
| mListeners = new CopyOnWriteArrayList<>(); |
| } |
| |
| /** |
| * Adds a listener for user changed events. Callbacks occur on an unspecified thread. |
| */ |
| public final void addListener(UserListener listener) { |
| mListeners.add(listener); |
| } |
| |
| /** |
| * Removes a listener for user changed events. |
| */ |
| public final void removeListener(UserListener listener) { |
| mListeners.remove(listener); |
| } |
| |
| protected final void dispatchOnUserStarted(@UserIdInt int userId) { |
| if (D) { |
| Log.d(TAG, "u" + userId + " started"); |
| } |
| |
| for (UserListener listener : mListeners) { |
| listener.onUserChanged(userId, USER_STARTED); |
| } |
| } |
| |
| protected final void dispatchOnUserStopped(@UserIdInt int userId) { |
| if (D) { |
| Log.d(TAG, "u" + userId + " stopped"); |
| } |
| |
| for (UserListener listener : mListeners) { |
| listener.onUserChanged(userId, USER_STOPPED); |
| } |
| } |
| |
| protected final void dispatchOnCurrentUserChanged(@UserIdInt int fromUserId, |
| @UserIdInt int toUserId) { |
| int[] fromUserIds = getProfileIds(fromUserId); |
| int[] toUserIds = getProfileIds(toUserId); |
| if (D) { |
| Log.d(TAG, "current user changed from u" + Arrays.toString(fromUserIds) + " to u" |
| + Arrays.toString(toUserIds)); |
| } |
| EVENT_LOG.logUserSwitched(fromUserId, toUserId); |
| |
| for (UserListener listener : mListeners) { |
| for (int userId : fromUserIds) { |
| listener.onUserChanged(userId, CURRENT_USER_CHANGED); |
| } |
| } |
| |
| for (UserListener listener : mListeners) { |
| for (int userId : toUserIds) { |
| listener.onUserChanged(userId, CURRENT_USER_CHANGED); |
| } |
| } |
| } |
| |
| /** |
| * Returns an array of running user ids. This will include all running users, and will also |
| * include any profiles of the running users. The caller must never mutate the returned |
| * array. |
| */ |
| public abstract int[] getRunningUserIds(); |
| |
| /** |
| * Returns true if the given user id is either the current user or a profile of the current |
| * user. |
| */ |
| public abstract boolean isCurrentUserId(@UserIdInt int userId); |
| |
| /** |
| * Returns the current user id. Where possible, prefer to use {@link #isCurrentUserId(int)} |
| * instead, as that method has more flexibility. |
| */ |
| public abstract @UserIdInt int getCurrentUserId(); |
| |
| protected abstract int[] getProfileIds(@UserIdInt int userId); |
| |
| /** |
| * Dump info for debugging. |
| */ |
| public abstract void dump(FileDescriptor fd, IndentingPrintWriter pw, String[] args); |
| } |