Re: [Boost-users] Unregistered Class Exception - Boost Serialization

From: Robert Ramey (ramey_at_[hidden])
Date: 2007-08-16 15:03:33

In this case your commiting an error.

You're saving an object and loading a pointer. You have to save and load to 
the same
thing.

Robert Ramey

> Thanks for the quick response! However, I have just started noticing a
> more pressing issue with the library. When I load a previously
> serialized object, the values seem to load out of order. For example,
> in the following code:
>
> #include <iostream>
> #include <sstream>
> #include <iomanip>
> #include <string>
> #include <sstream>
> #include <boost/serialization/serialization.hpp>
> #include <boost/archive/text_oarchive.hpp>
> #include <boost/archive/text_iarchive.hpp>
>
>
> class Some_Class
> {
> public:
>
> int i1;
> int i2;
> int i3;
>
> friend class boost::serialization::access;
>
> template<class Archive>
> void serialize(Archive & ar, const unsigned int version)
> {
> ar & i1;
> ar & i2;
> ar & i3;
> }
>
> };
>
>
> /*****************************************
> Main
> *****************************************/
> int main()
> {
>
> Some_Class send;
> send.i1=11;
> send.i2=12;
> send.i3=13;
>
>
> Some_Class * recv;
>
> // save class
> std::ostringstream output_stream;
> boost::archive::text_oarchive output_archive( output_stream );
> output_archive & send;
>
>
> // prints out: 22 serialization::archive 4 0 0 11 12 13
> std::cout << output_stream.str() << std::endl;
>
> // load class ptr
> std::istringstream input_stream( output_stream.str() );
> boost::archive::text_iarchive input_archive( input_stream );
>
> input_archive & recv;
>
> std::cout << recv->i1 << std::endl; // prints out: 12
> std::cout << recv->i2 << std::endl; // prints out: 13
> std::cout << recv->i3 << std::endl; // prints out: 0
>
>
> }
>
> The class object /send/ is saved with i1=11, i2=12, and i3=13.
> However, when I load the class pointer /recv/ with the serialized
> data, /i1/=12, /i2/=13 and /i3/=0. How is this possible? I am using
> boost version 1.34.1.
>
>
> Thanks!
> Jason