1 /*
2  * Copyright (C) 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 android.hardware;
18 
19 import android.os.Handler;
20 import android.os.MemoryFile;
21 
22 import java.io.IOException;
23 import java.io.UncheckedIOException;
24 import java.util.Collections;
25 import java.util.List;
26 
27 public class EmptySensorManager extends SensorManager {
28     private static EmptySensorManager sInstance;
29 
getInstance()30     public static EmptySensorManager getInstance() {
31         if (sInstance != null) {
32             sInstance = new EmptySensorManager();
33         }
34         return sInstance;
35     }
36 
37     @Override
getFullSensorList()38     protected List<Sensor> getFullSensorList() {
39         return Collections.emptyList();
40     }
41 
42     @Override
getFullDynamicSensorList()43     protected List<Sensor> getFullDynamicSensorList() {
44         return Collections.emptyList();
45     }
46 
47     @Override
unregisterListenerImpl(SensorEventListener listener, Sensor sensor)48     protected void unregisterListenerImpl(SensorEventListener listener, Sensor sensor) { }
49 
50     @Override
registerListenerImpl(SensorEventListener listener, Sensor sensor, int delayUs, Handler handler, int maxReportLatencyUs, int reservedFlags)51     protected boolean registerListenerImpl(SensorEventListener listener, Sensor sensor, int delayUs,
52             Handler handler, int maxReportLatencyUs, int reservedFlags) {
53         return false;
54     }
55 
56     @Override
flushImpl(SensorEventListener listener)57     protected boolean flushImpl(SensorEventListener listener) {
58         return false;
59     }
60 
61     @Override
createDirectChannelImpl(MemoryFile memoryFile, HardwareBuffer hardwareBuffer)62     protected SensorDirectChannel createDirectChannelImpl(MemoryFile memoryFile,
63             HardwareBuffer hardwareBuffer) {
64         throw new UncheckedIOException(new IOException("Not supported by layoutlib"));
65     }
66 
67     @Override
destroyDirectChannelImpl(SensorDirectChannel channel)68     protected void destroyDirectChannelImpl(SensorDirectChannel channel) { }
69 
70     @Override
configureDirectChannelImpl(SensorDirectChannel channel, Sensor s, int rate)71     protected int configureDirectChannelImpl(SensorDirectChannel channel, Sensor s, int rate) {
72         return 0;
73     }
74 
75     @Override
registerDynamicSensorCallbackImpl(DynamicSensorCallback callback, Handler handler)76     protected void registerDynamicSensorCallbackImpl(DynamicSensorCallback callback,
77             Handler handler) { }
78 
79     @Override
unregisterDynamicSensorCallbackImpl(DynamicSensorCallback callback)80     protected void unregisterDynamicSensorCallbackImpl(DynamicSensorCallback callback) { }
81 
82     @Override
requestTriggerSensorImpl(TriggerEventListener listener, Sensor sensor)83     protected boolean requestTriggerSensorImpl(TriggerEventListener listener, Sensor sensor) {
84         return false;
85     }
86 
87     @Override
cancelTriggerSensorImpl(TriggerEventListener listener, Sensor sensor, boolean disable)88     protected boolean cancelTriggerSensorImpl(TriggerEventListener listener, Sensor sensor,
89             boolean disable) {
90         return false;
91     }
92 
93     @Override
initDataInjectionImpl(boolean enable, int mode)94     protected boolean initDataInjectionImpl(boolean enable, int mode) {
95         return false;
96     }
97 
98     @Override
injectSensorDataImpl(Sensor sensor, float[] values, int accuracy, long timestamp)99     protected boolean injectSensorDataImpl(Sensor sensor, float[] values, int accuracy,
100             long timestamp) {
101         return false;
102     }
103 
104     @Override
setOperationParameterImpl(SensorAdditionalInfo parameter)105     protected boolean setOperationParameterImpl(SensorAdditionalInfo parameter) {
106         return false;
107     }
108 }
109