FactMetaData.cc

        qWarning() << errorString;
    }

    metaData->setDecimalPlaces(json[_decimalPlacesJsonKey].toInt(0));
    metaData->setShortDescription(json[_shortDescriptionJsonKey].toString());
    metaData->setLongDescription(json[_longDescriptionJsonKey].toString());

    if (json.contains(_unitsJsonKey)) {
        metaData->setRawUnits(json[_unitsJsonKey].toString());
    }

    QString defaultValueJsonKey;
#ifdef __mobile__
    if (json.contains(_mobileDefaultValueJsonKey)) {
        defaultValueJsonKey = _mobileDefaultValueJsonKey;
    }
#endif
    if (defaultValueJsonKey.isEmpty() && json.contains(_defaultValueJsonKey)) {
        defaultValueJsonKey = _defaultValueJsonKey;
    }
    if (!defaultValueJsonKey.isEmpty()) {
        QVariant typedValue;
        QString errorString;
        QVariant initialValue = json[defaultValueJsonKey].toVariant();
        if (metaData->convertAndValidateRaw(initialValue, true /* convertOnly */, typedValue, errorString)) {
            metaData->setRawDefaultValue(typedValue);
        } else {
            qWarning() << "Invalid default value, name:" << metaData->name()
                       << " type:" << metaData->type()
                       << " value:" << initialValue
                       << " error:" << errorString;
        }
    }

    if (json.contains(_minJsonKey)) {
        QVariant typedValue;
        QString errorString;
        QVariant initialValue = json[_minJsonKey].toVariant();
        if (metaData->convertAndValidateRaw(initialValue, true /* convertOnly */, typedValue, errorString)) {
            metaData->setRawMin(typedValue);
        } else {
            qWarning() << "Invalid min value, name:" << metaData->name()
                       << " type:" << metaData->type()
                       << " value:" << initialValue
                       << " error:" << errorString;
        }
    }

    if (json.contains(_maxJsonKey)) {
        QVariant typedValue;
        QString errorString;
        QVariant initialValue = json[_maxJsonKey].toVariant();
        if (metaData->convertAndValidateRaw(initialValue, true /* convertOnly */, typedValue, errorString)) {
            metaData->setRawMax(typedValue);
        } else {
            qWarning() << "Invalid max value, name:" << metaData->name()
                       << " type:" << metaData->type()
                       << " value:" << initialValue
                       << " error:" << errorString;
        }
    }

    if (json.contains(_hasControlJsonKey)) {
        metaData->setHasControl(json[_hasControlJsonKey].toBool());
    } else {
        metaData->setHasControl(true);
    }

    return metaData;
}

QMap<QString, FactMetaData*> FactMetaData::createMapFromJsonFile(const QString& jsonFilename, QObject* metaDataParent)
{
    QMap<QString, FactMetaData*> metaDataMap;

    QFile jsonFile(jsonFilename);
    if (!jsonFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
        qWarning() << "Unable to open file" << jsonFilename << jsonFile.errorString();
        return metaDataMap;
    }

    QByteArray bytes = jsonFile.readAll();
    jsonFile.close();
    QJsonParseError jsonParseError;
    QJsonDocument doc = QJsonDocument::fromJson(bytes, &jsonParseError);
    if (jsonParseError.error != QJsonParseError::NoError) {
        qWarning() <<  "Unable to parse json document" << jsonFilename << jsonParseError.errorString();
        return metaDataMap;
    }

    if (!doc.isArray()) {
        qWarning() << "json document is not array";
        return metaDataMap;
    }

    QJsonArray jsonArray = doc.array();
    return createMapFromJsonArray(jsonArray, metaDataParent);
}

QMap<QString, FactMetaData*> FactMetaData::createMapFromJsonArray(const QJsonArray jsonArray, QObject* metaDataParent)
{
    QMap<QString, FactMetaData*> metaDataMap;
    for (int i=0; i<jsonArray.count(); i++) {
        QJsonValue jsonValue = jsonArray.at(i);
        if (!jsonValue.isObject()) {
            qWarning() << QStringLiteral("JsonValue at index %1 not an object").arg(i);
            continue;
        }
        QJsonObject jsonObject = jsonValue.toObject();
        FactMetaData* metaData = createFromJsonObject(jsonObject, metaDataParent);
        if (metaDataMap.contains(metaData->name())) {
            qWarning() << QStringLiteral("Duplicate fact name:") << metaData->name();
            delete metaData;
        } else {
            metaDataMap[metaData->name()] = metaData;
        }
    }
    return metaDataMap;
}

QVariant FactMetaData::cookedMax(void) const
{
    // We have to be careful with cooked min/max. Running the raw values through the translator could flip min and max.
    QVariant cookedMax = _rawTranslator(_rawMax);
    QVariant cookedMin = _rawTranslator(_rawMin);
    if (cookedMax < cookedMin) {
        // We need to flip
        return cookedMin;
    } else {
        return cookedMax;
    }
}

QVariant FactMetaData::cookedMin(void) const
{
    // We have to be careful with cooked min/max. Running the raw values through the translator could flip min and max.
    QVariant cookedMax = _rawTranslator(_rawMax);
    QVariant cookedMin = _rawTranslator(_rawMin);
    if (cookedMax < cookedMin) {
        // We need to flip
        return cookedMax;
    } else {
        return cookedMin;
    }
}

void FactMetaData::setVolatileValue(bool bValue)
{
    _volatile = bValue;
    if (_volatile) {
        _readOnly = true;
    }
}