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1 /*
2  * Copyright (C) 2019 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.server.people;
18 
19 import android.annotation.UserIdInt;
20 import android.app.prediction.AppPredictionContext;
21 import android.app.prediction.AppTarget;
22 import android.app.prediction.IPredictionCallback;
23 import android.content.Context;
24 import android.content.pm.ParceledListSlice;
25 import android.os.RemoteCallbackList;
26 import android.os.RemoteException;
27 import android.util.Slog;
28 
29 import com.android.server.people.data.DataManager;
30 import com.android.server.people.prediction.AppTargetPredictor;
31 
32 import java.util.List;
33 
34 /** Manages the information and callbacks in an app prediction request session. */
35 class SessionInfo {
36 
37     private static final String TAG = "SessionInfo";
38 
39     private final AppTargetPredictor mAppTargetPredictor;
40     private final RemoteCallbackList<IPredictionCallback> mCallbacks =
41             new RemoteCallbackList<>();
42 
SessionInfo(AppPredictionContext predictionContext, DataManager dataManager, @UserIdInt int callingUserId, Context context)43     SessionInfo(AppPredictionContext predictionContext, DataManager dataManager,
44             @UserIdInt int callingUserId, Context context) {
45         mAppTargetPredictor = AppTargetPredictor.create(predictionContext,
46                 this::updatePredictions, dataManager, callingUserId, context);
47     }
48 
addCallback(IPredictionCallback callback)49     void addCallback(IPredictionCallback callback) {
50         mCallbacks.register(callback);
51     }
52 
removeCallback(IPredictionCallback callback)53     void removeCallback(IPredictionCallback callback) {
54         mCallbacks.unregister(callback);
55     }
56 
getPredictor()57     AppTargetPredictor getPredictor() {
58         return mAppTargetPredictor;
59     }
60 
onDestroy()61     void onDestroy() {
62         mCallbacks.kill();
63     }
64 
updatePredictions(List<AppTarget> targets)65     private void updatePredictions(List<AppTarget> targets) {
66         int callbackCount = mCallbacks.beginBroadcast();
67         for (int i = 0; i < callbackCount; i++) {
68             try {
69                 mCallbacks.getBroadcastItem(i).onResult(new ParceledListSlice<>(targets));
70             } catch (RemoteException e) {
71                 Slog.e(TAG, "Failed to calling callback" + e);
72             }
73         }
74         mCallbacks.finishBroadcast();
75     }
76 }
77