1 /* 2 * Copyright (C) 2017 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 com.android.car.vehiclehal; 18 19 import android.hardware.automotive.vehicle.V2_0.VehiclePropConfig; 20 import android.hardware.automotive.vehicle.V2_0.VehiclePropValue; 21 import android.hardware.automotive.vehicle.V2_0.DiagnosticFloatSensorIndex; 22 import android.hardware.automotive.vehicle.V2_0.DiagnosticIntegerSensorIndex; 23 import android.util.SparseArray; 24 import java.util.BitSet; 25 import java.util.Iterator; 26 27 /** 28 * A builder class for a VehiclePropValue that encapsulates a diagnostic event. This is the Java 29 * equivalent of Obd2SensorStore.cpp in the native layer. 30 * 31 * @hide 32 */ 33 public class DiagnosticEventBuilder { 34 /** 35 * An array-like container that knows to return a default value for any unwritten-to index. 36 * 37 * @param <T> the element type 38 */ 39 class DefaultedArray<T> implements Iterable<T> { 40 private final SparseArray<T> mElements = new SparseArray<>(); 41 private final int mSize; 42 private final T mDefaultValue; 43 DefaultedArray(int size, T defaultValue)44 DefaultedArray(int size, T defaultValue) { 45 mSize = size; 46 mDefaultValue = defaultValue; 47 } 48 checkIndex(int index)49 private int checkIndex(int index) { 50 if (index < 0 || index >= mSize) 51 throw new IndexOutOfBoundsException( 52 String.format("Index: %d, Size: %d", index, mSize)); 53 return index; 54 } 55 set(int index, T element)56 DefaultedArray<T> set(int index, T element) { 57 checkIndex(index); 58 mElements.put(index, element); 59 return this; 60 } 61 get(int index)62 T get(int index) { 63 checkIndex(index); 64 return mElements.get(index, mDefaultValue); 65 } 66 size()67 int size() { 68 return mSize; 69 } 70 clear()71 void clear() { 72 mElements.clear(); 73 } 74 75 @Override iterator()76 public Iterator<T> iterator() { 77 return new Iterator<T>() { 78 private int mIndex = 0; 79 80 @Override 81 public boolean hasNext() { 82 return (mIndex >= 0) && (mIndex < mSize); 83 } 84 85 @Override 86 public T next() { 87 int index = mIndex++; 88 return get(index); 89 } 90 }; 91 } 92 } 93 94 private final int mPropertyId; 95 private final int mNumIntSensors; 96 private final DefaultedArray<Integer> mIntValues; 97 private final DefaultedArray<Float> mFloatValues; 98 private final BitSet mBitmask; 99 private String mDtc = null; 100 DiagnosticEventBuilder(VehiclePropConfig propConfig)101 public DiagnosticEventBuilder(VehiclePropConfig propConfig) { 102 this(propConfig.prop, propConfig.configArray.get(0), propConfig.configArray.get(1)); 103 } 104 DiagnosticEventBuilder(int propertyId)105 public DiagnosticEventBuilder(int propertyId) { 106 this(propertyId, 0, 0); 107 } 108 DiagnosticEventBuilder( int propertyId, int numVendorIntSensors, int numVendorFloatSensors)109 public DiagnosticEventBuilder( 110 int propertyId, int numVendorIntSensors, int numVendorFloatSensors) { 111 mPropertyId = propertyId; 112 mNumIntSensors = DiagnosticIntegerSensorIndex.LAST_SYSTEM_INDEX + 1 + numVendorIntSensors; 113 final int numFloatSensors = 114 DiagnosticFloatSensorIndex.LAST_SYSTEM_INDEX + 1 + numVendorFloatSensors; 115 mBitmask = new BitSet(mNumIntSensors + numFloatSensors); 116 mIntValues = new DefaultedArray<>(mNumIntSensors, 0); 117 mFloatValues = new DefaultedArray<>(numFloatSensors, 0.0f); 118 } 119 clear()120 public DiagnosticEventBuilder clear() { 121 mIntValues.clear(); 122 mFloatValues.clear(); 123 mBitmask.clear(); 124 mDtc = null; 125 return this; 126 } 127 addIntSensor(int index, int value)128 public DiagnosticEventBuilder addIntSensor(int index, int value) { 129 mIntValues.set(index, value); 130 mBitmask.set(index); 131 return this; 132 } 133 addFloatSensor(int index, float value)134 public DiagnosticEventBuilder addFloatSensor(int index, float value) { 135 mFloatValues.set(index, value); 136 mBitmask.set(mNumIntSensors + index); 137 return this; 138 } 139 setDTC(String dtc)140 public DiagnosticEventBuilder setDTC(String dtc) { 141 mDtc = dtc; 142 return this; 143 } 144 build()145 public VehiclePropValue build() { 146 return build(0); 147 } 148 build(long timestamp)149 public VehiclePropValue build(long timestamp) { 150 VehiclePropValueBuilder propValueBuilder = VehiclePropValueBuilder.newBuilder(mPropertyId); 151 if (0 == timestamp) { 152 propValueBuilder.setTimestamp(); 153 } else { 154 propValueBuilder.setTimestamp(timestamp); 155 } 156 mIntValues.forEach(propValueBuilder::addIntValue); 157 mFloatValues.forEach(propValueBuilder::addFloatValue); 158 return propValueBuilder.addByteValue(mBitmask.toByteArray()).setStringValue(mDtc).build(); 159 } 160 } 161