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      1 /*
      2  * Copyright (C) 2016 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.car.hal;
     17 
     18 import static com.android.car.CarServiceUtils.toByteArray;
     19 import static java.lang.Integer.toHexString;
     20 
     21 import android.car.VehicleAreaType;
     22 import android.car.VehicleZoneUtil;
     23 import android.car.hardware.CarPropertyConfig;
     24 import android.car.hardware.CarPropertyValue;
     25 import android.hardware.automotive.vehicle.V2_0.VehicleArea;
     26 import android.hardware.automotive.vehicle.V2_0.VehicleAreaConfig;
     27 import android.hardware.automotive.vehicle.V2_0.VehiclePropConfig;
     28 import android.hardware.automotive.vehicle.V2_0.VehiclePropValue;
     29 import android.hardware.automotive.vehicle.V2_0.VehiclePropertyType;
     30 
     31 import java.util.Collections;
     32 import java.util.List;
     33 
     34 /**
     35  * Utility functions to work with {@link CarPropertyConfig} and {@link CarPropertyValue}
     36  */
     37 /*package*/ final class CarPropertyUtils {
     38 
     39     /* Utility class has no public constructor */
     40     private CarPropertyUtils() {}
     41 
     42     /** Converts {@link VehiclePropValue} to {@link CarPropertyValue} */
     43     static CarPropertyValue<?> toCarPropertyValue(
     44             VehiclePropValue halValue, int propertyId) {
     45         Class<?> clazz = getJavaClass(halValue.prop & VehiclePropertyType.MASK);
     46         int areaId = halValue.areaId;
     47         VehiclePropValue.RawValue v = halValue.value;
     48 
     49         if (Boolean.class == clazz) {
     50             return new CarPropertyValue<>(propertyId, areaId, v.int32Values.get(0) == 1);
     51         } else if (String.class == clazz) {
     52             return new CarPropertyValue<>(propertyId, areaId, v.stringValue);
     53         } else if (Long.class == clazz) {
     54             return new CarPropertyValue<>(propertyId, areaId, v.int64Values.get(0));
     55         } else if (byte[].class == clazz) {
     56             byte[] halData = toByteArray(v.bytes);
     57             return new CarPropertyValue<>(propertyId, areaId, halData);
     58         } else /* All list properties */ {
     59             Object[] values = getRawValueList(clazz, v).toArray();
     60             return new CarPropertyValue<>(propertyId, areaId,
     61                     values.length == 1 ? values[0] : values);
     62         }
     63     }
     64 
     65     /** Converts {@link CarPropertyValue} to {@link VehiclePropValue} */
     66     static VehiclePropValue toVehiclePropValue(CarPropertyValue carProp, int halPropId) {
     67         VehiclePropValue vehicleProp = new VehiclePropValue();
     68         vehicleProp.prop = halPropId;
     69         vehicleProp.areaId = carProp.getAreaId();
     70         VehiclePropValue.RawValue v = vehicleProp.value;
     71 
     72         Object o = carProp.getValue();
     73 
     74         if (o instanceof Boolean) {
     75             v.int32Values.add(((Boolean )o) ? 1 : 0);
     76         } else if (o instanceof Integer) {
     77             v.int32Values.add((Integer) o);
     78         } else if (o instanceof Float) {
     79             v.floatValues.add((Float) o);
     80         } else if (o instanceof Integer[]) {
     81             Collections.addAll(v.int32Values, (Integer[]) o);
     82         } else if (o instanceof Float[]) {
     83             Collections.addAll(v.floatValues, (Float[]) o);
     84         } else if (o instanceof String) {
     85             v.stringValue = (String) o;
     86         } else if (o instanceof byte[]) {
     87             for (byte b : (byte[]) o) {
     88                 v.bytes.add(b);
     89             }
     90         } else {
     91             throw new IllegalArgumentException("Unexpected type in: " + carProp);
     92         }
     93 
     94         return vehicleProp;
     95     }
     96 
     97     /**
     98      * Converts {@link VehiclePropConfig} to {@link CarPropertyConfig}.
     99      */
    100     static CarPropertyConfig<?> toCarPropertyConfig(VehiclePropConfig p, int propertyId) {
    101         int[] areas = VehicleZoneUtil.listAllZones(p.supportedAreas);
    102 
    103         int areaType = getVehicleAreaType(p.prop & VehicleArea.MASK);
    104 
    105         Class<?> clazz = getJavaClass(p.prop & VehiclePropertyType.MASK);
    106         if (p.areaConfigs.isEmpty()) {
    107             return CarPropertyConfig
    108                     .newBuilder(clazz, propertyId, areaType, /* capacity */ 1)
    109                     .addAreas(areas)
    110                     .build();
    111         } else {
    112             CarPropertyConfig.Builder builder = CarPropertyConfig
    113                     .newBuilder(clazz, propertyId, areaType, /* capacity */  p.areaConfigs.size());
    114 
    115             for (VehicleAreaConfig area : p.areaConfigs) {
    116                 if (classMatched(Integer.class, clazz)) {
    117                     builder.addAreaConfig(area.areaId, area.minInt32Value, area.maxInt32Value);
    118                 } else if (classMatched(Float.class, clazz)) {
    119                     builder.addAreaConfig(area.areaId, area.minFloatValue, area.maxFloatValue);
    120                 } else if (classMatched(Long.class, clazz)) {
    121                     builder.addAreaConfig(area.areaId, area.minInt64Value, area.maxInt64Value);
    122                 } else {
    123                     throw new IllegalArgumentException("Unexpected type: " + clazz);
    124                 }
    125             }
    126             return builder.build();
    127         }
    128     }
    129 
    130     private static @VehicleAreaType.VehicleAreaTypeValue int getVehicleAreaType(int halArea) {
    131         switch (halArea) {
    132             case VehicleArea.GLOBAL:
    133                 return VehicleAreaType.VEHICLE_AREA_TYPE_NONE;
    134             case VehicleArea.ZONE:
    135                 return VehicleAreaType.VEHICLE_AREA_TYPE_ZONE;
    136             case VehicleArea.SEAT:
    137                 return VehicleAreaType.VEHICLE_AREA_TYPE_SEAT;
    138             case VehicleArea.DOOR:
    139                 return VehicleAreaType.VEHICLE_AREA_TYPE_DOOR;
    140             case VehicleArea.WINDOW:
    141                 return VehicleAreaType.VEHICLE_AREA_TYPE_WINDOW;
    142             case VehicleArea.MIRROR:
    143                 return VehicleAreaType.VEHICLE_AREA_TYPE_MIRROR;
    144             default:
    145                 throw new RuntimeException("Unsupported area type " + halArea);
    146         }
    147     }
    148 
    149     private static Class<?> getJavaClass(int halType) {
    150         switch (halType) {
    151             case VehiclePropertyType.BOOLEAN:
    152                 return Boolean.class;
    153             case VehiclePropertyType.FLOAT:
    154                 return Float.class;
    155             case VehiclePropertyType.INT32:
    156                 return Integer.class;
    157             case VehiclePropertyType.INT32_VEC:
    158                 return Integer[].class;
    159             case VehiclePropertyType.FLOAT_VEC:
    160                 return Float[].class;
    161             case VehiclePropertyType.STRING:
    162                 return String.class;
    163             case VehiclePropertyType.BYTES:
    164                 return byte[].class;
    165             case VehiclePropertyType.COMPLEX:
    166                 return Object.class;
    167             default:
    168                 throw new IllegalArgumentException("Unexpected type: " + toHexString(halType));
    169         }
    170     }
    171 
    172     private static List getRawValueList(Class<?> clazz, VehiclePropValue.RawValue value) {
    173         if (classMatched(Float.class, clazz)) {
    174             return value.floatValues;
    175         } else if (classMatched(Integer.class, clazz)) {
    176             return value.int32Values;
    177         } else {
    178             throw new IllegalArgumentException("Unexpected type: " + clazz);
    179         }
    180     }
    181 
    182     private static boolean classMatched(Class<?> class1, Class<?> class2) {
    183         return class1 == class2 || class1.getComponentType() == class2;
    184     }
    185 }
    186