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      1 /*
      2  * Copyright 2018 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.hfp;
     17 
     18 import android.bluetooth.BluetoothDevice;
     19 import android.os.Looper;
     20 import android.util.Log;
     21 
     22 import com.android.bluetooth.Utils;
     23 import com.android.bluetooth.btservice.AdapterService;
     24 
     25 /**
     26  * Factory class for object initialization to help with unit testing
     27  */
     28 public class HeadsetObjectsFactory {
     29     private static final String TAG = HeadsetObjectsFactory.class.getSimpleName();
     30     private static HeadsetObjectsFactory sInstance;
     31     private static final Object INSTANCE_LOCK = new Object();
     32 
     33     private HeadsetObjectsFactory() {}
     34 
     35     /**
     36      * Get the singleton instance of object factory
     37      *
     38      * @return the singleton instance, guaranteed not null
     39      */
     40     public static HeadsetObjectsFactory getInstance() {
     41         synchronized (INSTANCE_LOCK) {
     42             if (sInstance == null) {
     43                 sInstance = new HeadsetObjectsFactory();
     44             }
     45         }
     46         return sInstance;
     47     }
     48 
     49     /**
     50      * Allow unit tests to substitute HeadsetObjectsFactory with a test instance
     51      *
     52      * @param objectsFactory a test instance of the HeadsetObjectsFactory
     53      */
     54     private static void setInstanceForTesting(HeadsetObjectsFactory objectsFactory) {
     55         Utils.enforceInstrumentationTestMode();
     56         synchronized (INSTANCE_LOCK) {
     57             Log.d(TAG, "setInstanceForTesting(), set to " + objectsFactory);
     58             sInstance = objectsFactory;
     59         }
     60     }
     61 
     62     /**
     63      * Make a {@link HeadsetStateMachine}
     64      *
     65      * @param device the remote device associated with this state machine
     66      * @param looper the thread that the state machine is supposed to run on
     67      * @param headsetService the headset service
     68      * @param adapterService the adapter service
     69      * @param nativeInterface native interface
     70      * @param systemInterface system interface
     71      * @return a state machine that is initialized and started, ready to go
     72      */
     73     public HeadsetStateMachine makeStateMachine(BluetoothDevice device, Looper looper,
     74             HeadsetService headsetService, AdapterService adapterService,
     75             HeadsetNativeInterface nativeInterface, HeadsetSystemInterface systemInterface) {
     76         return HeadsetStateMachine.make(device, looper, headsetService, adapterService,
     77                 nativeInterface, systemInterface);
     78     }
     79 
     80     /**
     81      * Destroy a state machine
     82      *
     83      * @param stateMachine to be destroyed. Cannot be used after this call.
     84      */
     85     public void destroyStateMachine(HeadsetStateMachine stateMachine) {
     86         HeadsetStateMachine.destroy(stateMachine);
     87     }
     88 
     89     /**
     90      * Get a system interface
     91      *
     92      * @param service headset service
     93      * @return a system interface
     94      */
     95     public HeadsetSystemInterface makeSystemInterface(HeadsetService service) {
     96         return new HeadsetSystemInterface(service);
     97     }
     98 
     99     /**
    100      * Get a singleton native interface
    101      *
    102      * @return the singleton native interface
    103      */
    104     public HeadsetNativeInterface getNativeInterface() {
    105         return HeadsetNativeInterface.getInstance();
    106     }
    107 }
    108