Question

I have a structure with a lot of dynamic (QVectors) and static fields and I need to serialize it. I’m willing to use this: http://www.developer.nokia.com/Community/Wiki/Qt_Object_Serialization

but there’s a field in this structure that I need but I don’t want it to be serialized, any suggestion how to avoid it?

Answer 1

To implement serialization, you’ll be defining the << and >> operators for QDataStream + your data structure. So just don’t write the field you don’t want serialized!

Edit: What you have to do to get a custom class to serialize:

class MyClass
{
    int member1;
    int member2; // <- Don't serialize me!
    int member3;

public:
    //Constructors and methods and bears (oh my!)...

    friend operator << (QDataStream& stream, const MyClass& myclass)
    {
        //Don't write member2:
        return stream << myclass.member1 << myclass.member3;
    }

    friend operator >> (QDataStream& stream, MyClass& myclass)
    {
        //Don't read it, either:
        return stream >> myclass.member1 >> myclass.member3;
    }
};