C ++的boost ::序列化设置固定标识码一类

问题描述

I'mm使用boost序列化和反序列化一些类

I'mm using boost to serialize and deserialize some classes

像这样：

boost::archive::xml_oarchive xmlArchive(oStringStream);

xmlArchive.register_type(static_cast<BaseMessage *>(NULL));
xmlArchive.register_type(static_cast<IncomingTradeMessage *>(NULL));
xmlArchive.register_type(static_cast<InternalRequestInfo *>(NULL));
xmlArchive.register_type(static_cast<InternalTradeTransInfo *>(NULL));

const BaseMessage* myMessage =message;

xmlArchive << make_nvp("Message", myMessage);

现在我clasess按照使用顺序得到标识码，我不想说，我想控制标识码的

now my clasess get a class_id according to the order used, i dont want that, i want to control the Class_id's

所以我可以做类似

BOOST_SET_CLASS_ID(1234, BaseMessage);

和无处不在我的项目BaseMessage将有1234标识码。

and everywhere in my project BaseMessage would have class_id of 1234.

我怎样才能做这样的事情。

How can i do such a thing

推荐答案

你不能使用 BOOST_CLASS_EXPORT_GUID 或类似呢？即。

Can't you use BOOST_CLASS_EXPORT_GUID or similar instead? I.e.

BOOST_CLASS_EXPORT_GUID(IncomingTradeMessage, "IncomingTradeMessage")
...

它会使用一些更多的带宽，因为字符串传递，而不是整数，但它会解决你的问题。

It will use some more bandwidth since strings are transmitted rather than integers, but it will solve your problem.

参阅并获取更多信息。

编辑：

这编译就好了：

#include <fstream>
#include <boost/serialization/export.hpp>
#include <boost/archive/text_oarchive.hpp>

class Foo {
    friend class boost::serialization::access;

    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        ar & dummy1;
    }

    int dummy1;

public:
    virtual ~Foo() {}
};

class Bar : public Foo {
    friend class boost::serialization::access;

    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        // serialize base class information
        ar & boost::serialization::base_object<Foo>(*this);
        ar & dummy2;
    }

    int dummy2;
};

BOOST_CLASS_EXPORT_GUID(Foo, "Foo")
BOOST_CLASS_EXPORT_GUID(Bar, "Bar")

int main(int argc, char *argv[]) {
    std::ofstream ofs("filename");
    boost::archive::text_oarchive oa(ofs);
    Foo *f = new Bar;
    oa << f;

    return 0;
}

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