AbstractPoint.cpp

#include "AbstractPoint.h"

BOOST_CLASS_EXPORT_IMPLEMENT(AbstractPoint)

AbstractPoint.h

#ifndef ABSTRACT_POINT_H
#define ABSTRACT_POINT_H

#include <boost/serialization/export.hpp>

class AbstractPoint
{
public:
    virtual ~AbstractPoint(){}
    virtual void DoSomething() = 0;

    // This is required if we want to serialize an AbstractPoint pointer
    template<class TArchive>
    void serialize(TArchive&, const unsigned int /*version*/)
    {
        // do nothing
    }
};

BOOST_SERIALIZATION_ASSUME_ABSTRACT(AbstractPoint)
BOOST_CLASS_EXPORT_KEY(AbstractPoint)

#endif

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
 
Project(PolymorphicRegisterMacros)

SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++11")

set(Boost_USE_MULTITHREADED ON) # which is the default

FIND_PACKAGE(Boost COMPONENTS serialization iostreams required)

INCLUDE_DIRECTORIES(${INCLUDE_DIRECTORIES} ${Boost_INCLUDE_DIRS})

add_custom_target(projectHeaders SOURCES AbstractPoint.h Point.h Library.h)

add_library(TestLib Library.cpp AbstractPoint.cpp Point.cpp)
target_link_libraries(TestLib boost_serialization-mt)

ADD_EXECUTABLE(TestExe PolymorphicRegisterMacros.cpp)
target_link_libraries(TestExe TestLib boost_serialization-mt)

Library.cpp

#include "Library.h"

#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/serialization/shared_ptr.hpp>
#include <boost/serialization/base_object.hpp>
#include <boost/serialization/export.hpp>

#include <fstream>

#include "Point.h"

void LibraryFunction()
{
    {
        std::shared_ptr<AbstractPoint> point(new Point(7.4));

        std::ofstream outputStream("test.txt");
        boost::archive::text_oarchive outputArchive(outputStream);
        outputArchive << point;
        outputStream.close();
    }

    {
        std::shared_ptr<AbstractPoint> pointRead;
        std::ifstream inputStream("test.txt");
        boost::archive::text_iarchive inputArchive(inputStream);
        inputArchive >> pointRead;

        if (auto p = std::dynamic_pointer_cast<Point>(pointRead))
            std::cout << p->mData << std::endl;
    }
}

Library.h

#ifndef LIBRARY_H
#define LIBRARY_H

void LibraryFunction();

#endif

Point.cpp

#ifndef POINT_H
#define POINT_H

#include <boost/serialization/export.hpp>
#include <boost/serialization/base_object.hpp>

#include "AbstractPoint.h"

class Point : public AbstractPoint
{
public:
    Point() = default;
    Point(const double data) : mData(data) {}

    void DoSomething(){}

    template<class TArchive>
    void serialize(TArchive& archive, const unsigned int /*version*/)
    {
        archive & boost::serialization::base_object<AbstractPoint>(*this)
                & mData;
    }

    double mData;
};

BOOST_CLASS_EXPORT_KEY(Point)

#endif

Point.h

#ifndef POINT_H
#define POINT_H

#include <boost/serialization/export.hpp>
#include <boost/serialization/base_object.hpp>

#include "AbstractPoint.h"

class Point : public AbstractPoint
{
public:
    Point() = default;
    Point(const double data) : mData(data) {}

    void DoSomething(){}

    template<class TArchive>
    void serialize(TArchive& archive, const unsigned int /*version*/)
    {
        archive & boost::serialization::base_object<AbstractPoint>(*this)
                & mData;
    }

    double mData;
};

BOOST_CLASS_EXPORT_KEY(Point)

#endif

PolymorphicRegisterMacro.cpp

#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/serialization/shared_ptr.hpp>
#include <boost/serialization/base_object.hpp>
#include <boost/serialization/export.hpp>

#include <fstream>

#include "Library.h"
#include "Point.h"

int main()
{
    LibraryFunction();

    return 0;
}