| /* |
| * Copyright 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.timezonedetector; |
| |
| import android.annotation.UserIdInt; |
| import android.os.Binder; |
| import android.os.UserHandle; |
| |
| /** |
| * An interface to wrap various difficult-to-intercept calls that services make to access / manage |
| * caller identity, e.g. {@link Binder#clearCallingIdentity()}. |
| */ |
| public interface CallerIdentityInjector { |
| |
| /** A singleton for the real implementation of {@link CallerIdentityInjector}. */ |
| CallerIdentityInjector REAL = new Real(); |
| |
| /** A {@link UserHandle#getCallingUserId()} call. */ |
| @UserIdInt int getCallingUserId(); |
| |
| /** A {@link Binder#clearCallingIdentity()} call. */ |
| long clearCallingIdentity(); |
| |
| /** A {@link Binder#restoreCallingIdentity(long)} ()} call. */ |
| void restoreCallingIdentity(long token); |
| |
| /** The real implementation of {@link CallerIdentityInjector}. */ |
| class Real implements CallerIdentityInjector { |
| |
| protected Real() { |
| } |
| |
| @Override |
| public int getCallingUserId() { |
| return UserHandle.getCallingUserId(); |
| } |
| |
| @Override |
| public long clearCallingIdentity() { |
| return Binder.clearCallingIdentity(); |
| } |
| |
| @Override |
| public void restoreCallingIdentity(long token) { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| } |