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 com.android.testutils
18 
19 import android.net.NetworkSpecifier
20 import android.os.Build
21 
22 /**
23  * Test utility to create [NetworkSpecifier]s on different SDK versions.
24  */
25 object CompatUtil {
26     @JvmStatic
27     fun makeTestNetworkSpecifier(ifName: String): NetworkSpecifier {
28         // Until R, there was no TestNetworkSpecifier, StringNetworkSpecifier was used instead
29         if (isDevSdkInRange(minExclusive = null, maxInclusive = Build.VERSION_CODES.R)) {
30             return makeNetworkSpecifierInternal("android.net.StringNetworkSpecifier", ifName)
31         }
32         // TestNetworkSpecifier is not part of the SDK in some branches using this utility
33         // TODO: replace with a direct call to the constructor
34         return makeNetworkSpecifierInternal("android.net.TestNetworkSpecifier", ifName)
35     }
36 
37     @JvmStatic
38     fun makeEthernetNetworkSpecifier(ifName: String): NetworkSpecifier {
39         // Until R, there was no EthernetNetworkSpecifier, StringNetworkSpecifier was used instead
40         if (isDevSdkInRange(minExclusive = null, maxInclusive = Build.VERSION_CODES.R)) {
41             return makeNetworkSpecifierInternal("android.net.StringNetworkSpecifier", ifName)
42         }
43         // EthernetNetworkSpecifier is not part of the SDK in some branches using this utility
44         // TODO: replace with a direct call to the constructor
45         return makeNetworkSpecifierInternal("android.net.EthernetNetworkSpecifier", ifName)
46     }
47 
48     private fun makeNetworkSpecifierInternal(clazz: String, specifier: String): NetworkSpecifier {
49         // StringNetworkSpecifier was removed after R (and was hidden API before that)
50         return Class.forName(clazz)
51                 .getConstructor(String::class.java).newInstance(specifier) as NetworkSpecifier
52     }
53 }