1 /*
2  * Copyright (C) 2022 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 android.annotation.FlaggedApi;
20 import android.annotation.NonNull;
21 import android.annotation.SystemApi;
22 import android.telephony.Annotation.DisconnectCauses;
23 
24 import com.android.internal.telephony.flags.Flags;
25 
26 import java.util.function.Consumer;
27 
28 /**
29  * A callback class used by the domain selection module to notify the framework of the result of
30  * selecting a domain for a call.
31  * @hide
32  */
33 @SystemApi
34 @FlaggedApi(Flags.FLAG_USE_OEM_DOMAIN_SELECTION_SERVICE)
35 public interface TransportSelectorCallback {
36     /**
37      * Notify that {@link DomainSelector} instance has been created for the selection request.
38      * <p>
39      * DomainSelector callbacks run using the executor specified in
40      * {@link DomainSelectionService#onCreateExecutor}.
41      *
42      * @param selector the {@link DomainSelector} instance created.
43      */
onCreated(@onNull DomainSelector selector)44     void onCreated(@NonNull DomainSelector selector);
45 
46     /**
47      * Notify that WLAN transport has been selected.
48      *
49      * @param useEmergencyPdn Indicates whether Wi-Fi emergency services use emergency PDN or not.
50      */
onWlanSelected(boolean useEmergencyPdn)51     void onWlanSelected(boolean useEmergencyPdn);
52 
53     /**
54      * Notify that WWAN transport has been selected and the next phase of selecting
55      * the PS or CS domain is starting.
56      *
57      * @param consumer The callback used by the {@link DomainSelectionService} to optionally run
58      *        emergency network scans and notify the framework of the WWAN transport result.
59      */
onWwanSelected(@onNull Consumer<WwanSelectorCallback> consumer)60     void onWwanSelected(@NonNull Consumer<WwanSelectorCallback> consumer);
61 
62     /**
63      * Notify that selection has terminated because there is no decision that can be made
64      * or a timeout has occurred. The call should be terminated when this method is called.
65      *
66      * @param cause indicates the reason.
67      */
onSelectionTerminated(@isconnectCauses int cause)68     void onSelectionTerminated(@DisconnectCauses int cause);
69 }
70