Hi lists, I'm working with the Serialization library but I'm having some troubles with it. The tutorials in the website shown me much but still I need help.
I'm using XML archives. I have this classes actually (these classes are all builders/prototypes, they serialize the datas and then they should make a new object with those datas): Serializer (an interface, every class which need serialization must be derived from this, however this is only a marker, it will be not serialized) RenderableSerializer : public Serializer - this isn't pure virtual however shouldn't be never serialized directly (since the object made by this class is a pure virtual one) - These will use the tag <renderable> SkyboxSerializer : public RenderableSerializer - these will use the tag <skybox> EntitySerializer : public Serializer - these will use the tag <entity> many other classes will be added in future and they'll all derive form RenderableSerializer.
Now the problem is EntitySerializer have a pointer to a RenderableSerializer and when I serialize EntitySerializer the pointer to that class is considered to be a RenderableSerializer and not the derived class. I don't know at priori which class is the base class and this lead to problem. If I serialize a SkyboxSerializer I have the correct tag: a <skybox> which have inside a <renderable> and the datas are correct. If I try to serialize an Entity I had a lot of problem, mostly just make the library crash. As I've seen in the tutorial I should register all the derived classes before pass the pointer to the Archive. I did it registering the SkyboxSerializer classes but it lead to a wrong xml: a correct <entity> tag which have a correct <skybox> with all it's data but also a wrong <renderable> tag which have inside the same data of the tag <skybox> instead of the data of a RenderableSerializer class.
Now the question is: is there a correct way to use the library this way? With a pointer to a base class of which the derived is not known? My code is too big and I made many attempt to use the library so I'm not posting it in this message. If you need it I will post it. Thank you for your replies.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users It seems no one know the answer. I hope it's just I made a too vague request. Here's the partial code (load function are implemented the same way, simmetrically): EntitySerializer.hpp: void *save*(xml_oarchive& ar, const unsigned int version) const { ar << make_nvp("EntityName", _nome); // string ar.register_type(static_cast
(NULL)); // Note:
Il 26/07/2010 18:58, BlueAngel ha scritto:
this is just for debug, in the future I'll make a function in every
class derived from Serializer which register itself when needed.
ar << make_nvp(_renderable->getTagName().c_str(), _renderable);
}
SkyboxSerializer.hpp:
void *save*(xml_oarchive& ar, const unsigned int version) const
{
ar << make_nvp("renderable",
boost::serialization::base_object< RenderableSerializer >(*this));
//RenderableSerializer::save(ar, version); // If I use this line
instead of the previous it de/serializer correctly but I know this is a
dirty work-around and I want to avoid it.
ar << make_nvp("shader_file", _fx_file); // std::string
ar << make_nvp("mesh_file", _mesh_filename); // std::string
ar << make_nvp("cubemap_file", _tex_filename); // std::string
}
RenderableSerialier.hpp:
void *save*(xml_oarchive& ar, const unsigned int version) const
{
ar << make_nvp("scala", _scala); // struct vector
ar << make_nvp("rotazione", _rotazione); // struct vector
ar << make_nvp("posizione", _posizione); // struct vector
}
VectorSerializer.hpp:
struct vettore
{
float x, y, z;
};
namespace boost
{
namespace serialization
{
template<class Archive> void *serialize*(Archive& ar, vettore& vec,
const unsigned int version)
{
ar & make_nvp("x", vec.x);
ar & make_nvp("y", vec.y);
ar & make_nvp("z", vec.z);
}
}
}
Serializer.hpp:
virtual void *save*(xml_oarchive& ar, const unsigned int version) const = 0;
And this is the xml resultant:
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE boost_serialization>