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/*
* 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.google.android.car.diagnosticverifier;
import android.car.diagnostic.CarDiagnosticEvent;
import android.util.JsonReader;
import com.android.car.vehiclehal.DiagnosticJson;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
/**
* This class provides method to convert JSON into car diagnostic event object.
*/
public class DiagnosticJsonConverter {
public static List<CarDiagnosticEvent> readFromJson(InputStream in) throws IOException {
JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
try {
return readEventsArray(reader);
} finally {
reader.close();
}
}
private static List<CarDiagnosticEvent> readEventsArray(JsonReader reader) throws IOException {
List<CarDiagnosticEvent> events = new ArrayList<>();
reader.beginArray();
while (reader.hasNext()) {
events.add(readEventAndCanonicalize(reader));
}
reader.endArray();
return events;
}
public static CarDiagnosticEvent readEventAndCanonicalize(InputStream in) throws IOException {
JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
return readEventAndCanonicalize(reader);
}
/**
* This method convert JSON to a car diagnostic event object.
* Note: it will always set timestamp to 0 and set dtc to null if it is empty string.
*/
private static CarDiagnosticEvent readEventAndCanonicalize(JsonReader reader)
throws IOException {
DiagnosticJson diagnosticJson = DiagnosticJson.build(reader);
//Build event
CarDiagnosticEvent.Builder builder = "freeze".equals(diagnosticJson.type) ?
CarDiagnosticEvent.Builder.newFreezeFrameBuilder() :
CarDiagnosticEvent.Builder.newLiveFrameBuilder();
//Always skip timestamp because it is not useful for test
builder.atTimestamp(0);
for (int i = 0; i < diagnosticJson.intValues.size(); i++) {
builder.withIntValue(diagnosticJson.intValues.keyAt(i),
diagnosticJson.intValues.valueAt(i));
}
for (int i = 0; i < diagnosticJson.floatValues.size(); i++) {
builder.withFloatValue(diagnosticJson.floatValues.keyAt(i),
diagnosticJson.floatValues.valueAt(i));
}
//Always set dtc to null if it is empty string
builder.withDtc("".equals(diagnosticJson.dtc) ? null : diagnosticJson.dtc);
return builder.build();
}
}
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