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 package com.android.bluetooth.btservice; 17 18 import android.bluetooth.BluetoothAdapter; 19 import android.util.Log; 20 21 import com.android.bluetooth.Utils; 22 import com.android.internal.annotations.VisibleForTesting; 23 24 /** 25 * A proxy class that facilitates testing of the ScanManager. 26 * 27 * <p>This is necessary due to the "final" attribute of the BluetoothAdapter class. In order to test 28 * the correct functioning of the ScanManager class, the final class must be put into a container 29 * that can be mocked correctly. 30 */ 31 public class BluetoothAdapterProxy { 32 private static final String TAG = BluetoothAdapterProxy.class.getSimpleName(); 33 34 private static BluetoothAdapterProxy sInstance; 35 private static final Object INSTANCE_LOCK = new Object(); 36 BluetoothAdapterProxy()37 private BluetoothAdapterProxy() {} 38 39 /** 40 * Get the singleton instance of proxy. 41 * 42 * @return the singleton instance, guaranteed not null 43 */ getInstance()44 public static BluetoothAdapterProxy getInstance() { 45 synchronized (INSTANCE_LOCK) { 46 if (sInstance == null) { 47 sInstance = new BluetoothAdapterProxy(); 48 } 49 return sInstance; 50 } 51 } 52 53 /** 54 * Proxy function that calls {@link BluetoothAdapter#isOffloadedFilteringSupported()}. 55 * 56 * @return whether the offloaded scan filtering is supported 57 */ isOffloadedScanFilteringSupported()58 public boolean isOffloadedScanFilteringSupported() { 59 BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); 60 return adapter.isOffloadedFilteringSupported(); 61 } 62 63 /** 64 * Allow unit tests to substitute BluetoothAdapterProxy with a test instance 65 * 66 * @param proxy a test instance of the BluetoothAdapterProxy 67 */ 68 @VisibleForTesting setInstanceForTesting(BluetoothAdapterProxy proxy)69 public static void setInstanceForTesting(BluetoothAdapterProxy proxy) { 70 Utils.enforceInstrumentationTestMode(); 71 synchronized (INSTANCE_LOCK) { 72 Log.d(TAG, "setInstanceForTesting(), set to " + proxy); 73 sInstance = proxy; 74 } 75 } 76 } 77