Polymorphic Q_GADGETs about qtjsonserializer HOT 3 CLOSED

class GadgetBase {
    //...
};

class Gadget1 : public GadgetBase {
    // ...
};

class Gadget2 : public GadgetBase {
    // ...
};

class SomeOtherGadget {
    GadgetBase *theGadget; //should be either 1 or 2
};

class SomeOtherGadget {
    Q_GADGET

    Q_PROPERTY(QJsonObject theGadget READ getGad WRITE setGad)

    GadgetBase *theGadget;
    QJsonSerializer *serializer;

    SomeOtherGadget() {
        serializer = // get the serializer somehow or just create a new one
    }

    QJsonObject getGad() const {
        QJsonObject obj;
        QString type = getGadgetClassName(theGadget);
        if(type == "Gadget1")
            obj = serializer->serialize(*static_cast<Gadget1*>(theGadget));
        else if(type == "Gadget2")
            obj = serializer->serialize(*static_cast<Gadget2*>(theGadget));
        // ...
        obj["@class"] = type;
        return obj;
    }

    void setGad(const QJsonObject &obj) {
        if(obj["@class"] == "Gadget1")
            theGadget = new Gadget1(serializer->deserialize<Gadget1>(obj)); //copy-construct to the heap
        else if(obj["@class"] == "Gadget2")
            theGadget = new Gadget2(serializer->deserialize<Gadget2>(obj)); //copy-construct to the heap
        // ...
    }
};