| /* |
| * Copyright (C) 2017 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 com.android.car.obd2; |
| |
| import android.os.SystemClock; |
| import android.util.JsonWriter; |
| import android.util.Log; |
| import com.android.car.obd2.Obd2Command.LiveFrameCommand; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.Set; |
| |
| public class Obd2LiveFrameGenerator { |
| public static final String FRAME_TYPE_LIVE = "live"; |
| public static final String TAG = Obd2LiveFrameGenerator.class.getSimpleName(); |
| |
| private final Obd2Connection mConnection; |
| private final List<LiveFrameCommand<Integer>> mIntegerCommands = new ArrayList<>(); |
| private final List<LiveFrameCommand<Float>> mFloatCommands = new ArrayList<>(); |
| |
| public Obd2LiveFrameGenerator(Obd2Connection connection) |
| throws IOException, InterruptedException { |
| mConnection = connection; |
| Set<Integer> connectionPids = connection.getSupportedPIDs(); |
| Set<Integer> apiIntegerPids = Obd2Command.getSupportedIntegerCommands(); |
| Set<Integer> apiFloatPids = Obd2Command.getSupportedFloatCommands(); |
| apiIntegerPids |
| .stream() |
| .filter(connectionPids::contains) |
| .forEach( |
| (Integer pid) -> |
| mIntegerCommands.add( |
| Obd2Command.getLiveFrameCommand( |
| Obd2Command.getIntegerCommand(pid)))); |
| apiFloatPids |
| .stream() |
| .filter(connectionPids::contains) |
| .forEach( |
| (Integer pid) -> |
| mFloatCommands.add( |
| Obd2Command.getLiveFrameCommand( |
| Obd2Command.getFloatCommand(pid)))); |
| Log.i( |
| TAG, |
| String.format( |
| "connectionPids = %s\napiIntegerPids=%s\napiFloatPids = %s\n" |
| + "mIntegerCommands = %s\nmFloatCommands = %s\n", |
| connectionPids, |
| apiIntegerPids, |
| apiFloatPids, |
| mIntegerCommands, |
| mFloatCommands)); |
| } |
| |
| public JsonWriter generate(JsonWriter jsonWriter) throws IOException { |
| return generate(jsonWriter, SystemClock.elapsedRealtimeNanos()); |
| } |
| |
| public JsonWriter generate(JsonWriter jsonWriter, long timestamp) throws IOException { |
| jsonWriter.beginObject(); |
| jsonWriter.name("type").value(FRAME_TYPE_LIVE); |
| jsonWriter.name("timestamp").value(timestamp); |
| jsonWriter.name("intValues").beginArray(); |
| for (LiveFrameCommand<Integer> command : mIntegerCommands) { |
| try { |
| Optional<Integer> result = command.run(mConnection); |
| if (result.isPresent()) { |
| jsonWriter.beginObject(); |
| jsonWriter.name("id").value(command.getPid()); |
| jsonWriter.name("value").value(result.get()); |
| jsonWriter.endObject(); |
| } |
| } catch (IOException | InterruptedException e) { |
| Log.w( |
| TAG, |
| String.format( |
| "unable to retrieve OBD2 pid %d due to exception: %s", |
| command.getPid(), e)); |
| // skip this entry |
| } |
| } |
| jsonWriter.endArray(); |
| |
| jsonWriter.name("floatValues").beginArray(); |
| for (LiveFrameCommand<Float> command : mFloatCommands) { |
| try { |
| Optional<Float> result = command.run(mConnection); |
| if (result.isPresent()) { |
| jsonWriter.beginObject(); |
| jsonWriter.name("id").value(command.getPid()); |
| jsonWriter.name("value").value(result.get()); |
| jsonWriter.endObject(); |
| } |
| } catch (IOException | InterruptedException e) { |
| Log.w( |
| TAG, |
| String.format( |
| "unable to retrieve OBD2 pid %d due to exception: %s", |
| command.getPid(), e)); |
| // skip this entry |
| } |
| } |
| jsonWriter.endArray(); |
| |
| return jsonWriter.endObject(); |
| } |
| } |