1/*
2 * Copyright (C) 2014 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
17package com.android.location.provider;
18
19import android.annotation.NonNull;
20import android.annotation.Nullable;
21import android.hardware.location.IActivityRecognitionHardware;
22import android.hardware.location.IActivityRecognitionHardwareWatcher;
23import android.os.Binder;
24import android.os.IBinder;
25import android.os.Process;
26import android.os.RemoteException;
27import android.util.Log;
28
29/**
30 * A watcher class for Activity-Recognition instances.
31 *
32 * @deprecated use {@link ActivityRecognitionProviderClient} instead.
33 */
34@Deprecated
35public class ActivityRecognitionProviderWatcher {
36    private static final String TAG = "ActivityRecognitionProviderWatcher";
37
38    private static ActivityRecognitionProviderWatcher sWatcher;
39    private static final Object sWatcherLock = new Object();
40
41    private ActivityRecognitionProvider mActivityRecognitionProvider;
42
43    private ActivityRecognitionProviderWatcher() {}
44
45    public static ActivityRecognitionProviderWatcher getInstance() {
46        synchronized (sWatcherLock) {
47            if (sWatcher == null) {
48                sWatcher = new ActivityRecognitionProviderWatcher();
49            }
50            return sWatcher;
51        }
52    }
53
54    private IActivityRecognitionHardwareWatcher.Stub mWatcherStub =
55            new IActivityRecognitionHardwareWatcher.Stub() {
56        @Override
57        public void onInstanceChanged(IActivityRecognitionHardware instance) {
58            int callingUid = Binder.getCallingUid();
59            if (callingUid != Process.SYSTEM_UID) {
60                Log.d(TAG, "Ignoring calls from non-system server. Uid: " + callingUid);
61                return;
62            }
63
64            try {
65                mActivityRecognitionProvider = new ActivityRecognitionProvider(instance);
66            } catch (RemoteException e) {
67                Log.e(TAG, "Error creating Hardware Activity-Recognition", e);
68            }
69        }
70    };
71
72    /**
73     * Gets the binder needed to interact with proxy provider in the platform.
74     */
75    @NonNull
76    public IBinder getBinder() {
77        return mWatcherStub;
78    }
79
80    /**
81     * Gets an object that supports the functionality of {@link ActivityRecognitionProvider}.
82     *
83     * @return Non-null value if the functionality is supported by the platform, false otherwise.
84     */
85    @Nullable
86    public ActivityRecognitionProvider getActivityRecognitionProvider() {
87        return mActivityRecognitionProvider;
88    }
89}
90