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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.car.cluster.sensors;
import android.car.VehiclePropertyIds;
import android.car.VehiclePropertyType;
import android.car.hardware.CarPropertyValue;
import android.car.hardware.CarSensorEvent;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
/**
* The collection of all sensors supported by this application.
*/
public class Sensors {
/** Area identifier used for sensors corresponding to global VHAL properties */
public static final int GLOBAL_AREA_ID = -1;
private static Sensors sInstance;
private static List<Sensor<?>> sSensors = new ArrayList<>();
private Map<Integer, List<Sensor<?>>> mSensorsByPropertyId = new HashMap<>();
/** Possible values of the {@link #SENSOR_GEAR} sensor */
public enum Gear {
NEUTRAL,
REVERSE,
DRIVE,
PARK,
}
/** Fuel of the car, measured in millimeters */
public static final Sensor<Float> SENSOR_FUEL = registerSensor(
"Fuel", VehiclePropertyIds.FUEL_LEVEL, GLOBAL_AREA_ID, VehiclePropertyType.FLOAT,
value -> (Float) value.getValue());
/** Fuel capacity of the car, measured in millimeters */
public static final Sensor<Float> SENSOR_FUEL_CAPACITY = registerSensor(
"Fuel Capacity", VehiclePropertyIds.INFO_FUEL_CAPACITY, GLOBAL_AREA_ID,
VehiclePropertyType.FLOAT,
value -> (Float) value.getValue());
/** RPMs */
public static final Sensor<Float> SENSOR_RPM = registerSensor(
"RPM", VehiclePropertyIds.ENGINE_RPM, GLOBAL_AREA_ID,
VehiclePropertyType.FLOAT,
value -> (Float) value.getValue());
/** Fuel range in meters */
public static final Sensor<Float> SENSOR_FUEL_RANGE = registerSensor(
"Fuel Range", VehiclePropertyIds.RANGE_REMAINING, GLOBAL_AREA_ID,
VehiclePropertyType.FLOAT,
value -> (Float) value.getValue());
/** Speed in meters per second */
public static final Sensor<Float> SENSOR_SPEED = registerSensor(
"Speed", VehiclePropertyIds.PERF_VEHICLE_SPEED, GLOBAL_AREA_ID,
VehiclePropertyType.FLOAT,
value -> (Float) value.getValue());
/** Current gear of the car */
public static final Sensor<Gear> SENSOR_GEAR = registerSensor(
"Gear", VehiclePropertyIds.GEAR_SELECTION, GLOBAL_AREA_ID, VehiclePropertyType.INT32,
value -> {
if (value == null) {
return null;
}
Integer gear = (Integer) value.getValue();
if ((gear & CarSensorEvent.GEAR_REVERSE) != 0) {
return Gear.REVERSE;
} else if ((gear & CarSensorEvent.GEAR_NEUTRAL) != 0) {
return Gear.NEUTRAL;
} else if ((gear & CarSensorEvent.GEAR_DRIVE) != 0) {
return Gear.DRIVE;
} else if ((gear & CarSensorEvent.GEAR_PARK) != 0) {
return Gear.PARK;
} else {
return null;
}
});
private static <T> Sensor<T> registerSensor(String propertyName, int propertyId, int areaId,
int expectedPropertyType, Function<CarPropertyValue<?>, T> adapter) {
Sensor<T> sensor = new Sensor<>(propertyName, propertyId, areaId, expectedPropertyType,
adapter);
sSensors.add(sensor);
return sensor;
}
/**
* Obtains the singleton instance of this class
*/
public static Sensors getInstance() {
if (sInstance == null) {
sInstance = new Sensors();
}
return sInstance;
}
private Sensors() {
initializeSensorsMap();
}
private void initializeSensorsMap() {
for (Sensor<?> sensorId : getSensors()) {
mSensorsByPropertyId
.computeIfAbsent(sensorId.mPropertyId, (id) -> new ArrayList<>())
.add(sensorId);
}
}
/**
* Returns all sensors.
*/
public List<Sensor<?>> getSensors() {
return sSensors;
}
/**
* Returns all sensors associated to the given VHAL property id.
*/
public List<Sensor<?>> getSensorsForPropertyId(int propertyId) {
return mSensorsByPropertyId.get(propertyId);
}
/**
* Returns all property ids we care about.
*/
public Set<Integer> getPropertyIds() {
return mSensorsByPropertyId.keySet();
}
}
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