1 /*
2  * Copyright 2023 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.bluetooth;
18 
19 import android.annotation.NonNull;
20 import android.content.ContentResolver;
21 import android.os.Binder;
22 import android.os.IBinder;
23 import android.provider.Settings;
24 
25 import com.android.internal.annotations.VisibleForTesting;
26 
27 /** Proxy class for method calls to help with unit testing */
28 class BluetoothServerProxy {
29     private static final String TAG = BluetoothServerProxy.class.getSimpleName();
30     private static final Object INSTANCE_LOCK = new Object();
31     private static BluetoothServerProxy sInstance;
32 
BluetoothServerProxy()33     private BluetoothServerProxy() {}
34 
35     /**
36      * Get the singleton instance of proxy
37      *
38      * @return the singleton instance, guaranteed not null
39      */
getInstance()40     static @NonNull BluetoothServerProxy getInstance() {
41         synchronized (INSTANCE_LOCK) {
42             if (sInstance == null) {
43                 sInstance = new BluetoothServerProxy();
44             }
45         }
46         return sInstance;
47     }
48 
49     /** Allow unit tests to substitute proxy with a test instance */
50     @VisibleForTesting
setInstanceForTesting(BluetoothServerProxy proxy)51     static void setInstanceForTesting(BluetoothServerProxy proxy) {
52         synchronized (INSTANCE_LOCK) {
53             Log.d(TAG, "setInstanceForTesting(), set to " + proxy);
54             sInstance = proxy;
55         }
56     }
57 
createAdapterBinder(IBinder binder)58     AdapterBinder createAdapterBinder(IBinder binder) {
59         return new AdapterBinder(binder);
60     }
61 
settingsSecureGetString(ContentResolver contentResolver, String name)62     String settingsSecureGetString(ContentResolver contentResolver, String name) {
63         return Settings.Secure.getString(contentResolver, name);
64     }
65 
settingsGlobalGetInt(ContentResolver contentResolver, String name, int def)66     int settingsGlobalGetInt(ContentResolver contentResolver, String name, int def) {
67         return Settings.Global.getInt(contentResolver, name, def);
68     }
69 
getBluetoothPersistedState(ContentResolver resolver, int defaultValue)70     int getBluetoothPersistedState(ContentResolver resolver, int defaultValue) {
71         return Settings.Global.getInt(resolver, Settings.Global.BLUETOOTH_ON, defaultValue);
72     }
73 
setBluetoothPersistedState(ContentResolver resolver, int state)74     void setBluetoothPersistedState(ContentResolver resolver, int state) {
75         Log.i(TAG, "setBluetoothPersistedState(" + state + ")");
76         // waive WRITE_SECURE_SETTINGS permission check
77         final long callingIdentity = Binder.clearCallingIdentity();
78         try {
79             Settings.Global.putInt(resolver, Settings.Global.BLUETOOTH_ON, state);
80         } finally {
81             Binder.restoreCallingIdentity(callingIdentity);
82         }
83     }
84 }
85