Re: [Boost-users] Problem with Boost Serialization

Subject: Re: [Boost-users] Problem with Boost Serialization
From: Matthias Troyer (troyer_at_[hidden])
Date: 2010-03-03 10:57:12

On 3 Mar 2010, at 00:44, Binh Luong wrote:

> 
> Hi,
> 
> 
> Matthias Troyer-2 wrote:
>> 
>> You should not have to define your class as a wrapper. Can you send the
>> code fragment that causes the problem?
>> 
>> Matthias
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users_at_[hidden]
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>> 
> 
> here are the code segments that cause the problem:
> As you see in the last message, there are errors in
> RemoteMessagingSystem.cpp:147 and RemoteMessagingSystem.cpp:147. They are
> the following 2 functions which serializes the obj Message to xml archive
> and deserializes xml archive backwards to obj Message.
> 
> string RemoteMessagingSystem::serialize (Message* msg)
> {
> 	stringstream archiveStream (ios_base::binary | ios_base::out);
> 	{ 
> #ifdef REMOTE_XML
> 		boost::archive::xml_oarchive outputArchive( archiveStream );
> #else
> 		boost::archive::binary_oarchive outputArchive( archiveStream );
> #endif //REMOTE_XML
> 	    outputArchive & msg;  //line 147
> 	}
> 	
> 	string data = archiveStream.str();
> 	return data;
> }
> 
> Message* RemoteMessagingSystem::deserialize (string data)
> {
> 	stringstream archivStream (data, ios_base::binary | ios_base::in);
> #ifdef REMOTE_XML
> 	boost::archive::xml_iarchive inputArchive( archivStream );
> #else
> 	boost::archive::binary_iarchive inputArchive( archivStream );
> #endif
> 
> 	Message* msg = NULL;
> 	inputArchive >> msg;   // line 164
> 
> 	return msg;
> }
> 
> 

Two things:

1.) You need to wrap the object into a NVP to use it with XML archives.
2.) You can only serialize const objects into a output archive, hence try passing a const pointer to the RemoteMessagingSystem::serialize function

Matthias