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.telephony;
18 
19 import java.util.UUID;
20 
21 /**
22  * Shim used for code in frameworks/opt/telephony to be able to call code in
23  * packages/services/Telephony. A singleton instance of this class is set when the phone process
24  * is brought up.
25  * @hide
26  */
27 public class TelephonyLocalConnection {
28     public interface ConnectionImpl {
getCallComposerServerUrlForHandle(int subscriptionId, UUID uuid)29         String getCallComposerServerUrlForHandle(int subscriptionId, UUID uuid);
30     }
31     private static ConnectionImpl sInstance;
32 
getCallComposerServerUrlForHandle(int subscriptionId, UUID uuid)33     public static String getCallComposerServerUrlForHandle(int subscriptionId, UUID uuid) {
34         checkInstance();
35         return sInstance.getCallComposerServerUrlForHandle(subscriptionId, uuid);
36     }
37 
checkInstance()38     private static void checkInstance() {
39         if (sInstance == null) {
40             throw new IllegalStateException("Connection impl is null!");
41         }
42     }
43 
setInstance(ConnectionImpl impl)44     public static void setInstance(ConnectionImpl impl) {
45         sInstance = impl;
46     }
47 }
48