1 /*
2  * 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 android.car.builtin.util;
18 
19 import android.annotation.AppIdInt;
20 import android.annotation.SystemApi;
21 import android.annotation.UserIdInt;
22 import android.os.UserHandle;
23 
24 /**
25  * Helper to validate various data from android.
26  *
27  * @hide
28  */
29 @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
30 public final class ValidationHelper {
ValidationHelper()31     private ValidationHelper()   {
32         throw new UnsupportedOperationException();
33     }
34 
35     /** Returns true if passed userId is valid */
isUserIdValid(@serIdInt int userId)36     public static boolean isUserIdValid(@UserIdInt int userId) {
37         return !((userId != UserHandle.USER_NULL && userId < UserHandle.USER_CURRENT_OR_SELF)
38                 || userId > Integer.MAX_VALUE / UserHandle.PER_USER_RANGE);
39     }
40 
41     /** Returns true if passed appId is valid */
isAppIdValid(@ppIdInt int appId)42     public static boolean isAppIdValid(@AppIdInt int appId) {
43         return !(appId / UserHandle.PER_USER_RANGE != 0 || appId < 0);
44     }
45 }
46