Re: [Boost-users] Serialization truncation?: xml_oarchive, ostringstream vs. ofstream

From: Martin Ecker (martin.ecker_at_[hidden])
Date: 2005-06-21 15:35:30

Hello,

Benjamin.Sternlieb_at_[hidden] wrote:
>  I was trying out boost serialization and ran into a snag.  If I serialize the same object onto two xml_oarchives, one constructed with a ostringstream and one constructed with an ofstream, I get differing results - the file based xml is well formed, but the string based xml is missing its final closing tag.
> 
>  Here is the generating code snippet:
> 
>       // now serialize
>       ostringstream os;
>       boost::archive::xml_oarchive ar(os);
>       ofstream ofs("/home/sternlbe/boo.xml");
>       boost::archive::xml_oarchive ar2(ofs);
>       Portfolio& port = *p;
>       ar << BOOST_SERIALIZATION_NVP(port);
>       ar2 << BOOST_SERIALIZATION_NVP(port);
>       string s = os.str();
>       LOG_DEBUG(logger) << "Xml string: \n" << s; 

You should always make sure the archive object has been closed and destroyed
before accessing any results. Try this and it should work:

ostringstream os;
ofstream ofs("/home/sternlbe/boo.xml");
{
         boost::archive::xml_oarchive ar(os);
         boost::archive::xml_oarchive ar2(ofs);
         Portfolio& port = *p;
         ar << BOOST_SERIALIZATION_NVP(port);
         ar2 << BOOST_SERIALIZATION_NVP(port);
}
string s = os.str();
LOG_DEBUG(logger) << "Xml string: \n" << s;

Best Regards,
Martin