Serialization of a std::vector< boost::shared_ptr< A > > throws unregistered_class exception

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Benoit Gagnon

19 Mar 2009 19 Mar '09

12:46 a.m.

Given the following classes: class Building { ... }; class House : public Building { ... }; class Hospital : public Building { ... }; With appropriate serialization method templates such as: class House: public Building { friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int version ) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP( Building ); ar & BOOST_SERIALIZATION_NVP( mNumBedrooms ); ar & BOOST_SERIALIZATION_NVP( mNumBathrooms ); } ... I have the following registrations in main.cpp where the archiving/ restoring is performed: BOOST_SERIALIZATION_SHARED_PTR( Building ) BOOST_SERIALIZATION_SHARED_PTR( House ) BOOST_SERIALIZATION_SHARED_PTR( Hospital ) In main.ccp, I would like to serialize a std::vector< boost::shared_ptr< Building > > object. Like this: std::vector< boost::shared_ptr< Building > > buildings; ... std::ofstream ofs( "archive.txt" ); boost::archive::text_oarchive oa( ofs ); oa & BOOST_SERIALIZATION_NVP( buildings ); This compiles correctly but fails at runtime with a "unregistered_class" exception. The individual classes (Building, House, Hospital) can be serialized and restored fine individually. That is true for objects, pointers and shared_ptr. A vector of plain pointers to any of those types also works fine. But a vector of shared_ptr to any of those types fails at runtime.. What kind of registration must be done to achieve this?

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Robert Ramey

19 Mar 19 Mar

4:58 p.m.

New subject: Serialization of a std::vector< boost::shared_ptr< A> > throws unregistered_class exception

Depending on which version of boost you're using. You may have to include a special macro - look into serialization/shared_ptr.hpp at the end. Robert Ramey Benoit Gagnon wrote:

...

Given the following classes:

class Building { ... }; class House : public Building { ... }; class Hospital : public Building { ... };

With appropriate serialization method templates such as:

class House: public Building { friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int version ) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP( Building ); ar & BOOST_SERIALIZATION_NVP( mNumBedrooms ); ar & BOOST_SERIALIZATION_NVP( mNumBathrooms ); } ...

I have the following registrations in main.cpp where the archiving/ restoring is performed:

BOOST_SERIALIZATION_SHARED_PTR( Building ) BOOST_SERIALIZATION_SHARED_PTR( House ) BOOST_SERIALIZATION_SHARED_PTR( Hospital )

In main.ccp, I would like to serialize a std::vector< boost::shared_ptr< Building > > object. Like this:

std::vector< boost::shared_ptr< Building > > buildings; ... std::ofstream ofs( "archive.txt" ); boost::archive::text_oarchive oa( ofs ); oa & BOOST_SERIALIZATION_NVP( buildings );

This compiles correctly but fails at runtime with a "unregistered_class" exception. The individual classes (Building, House, Hospital) can be serialized and restored fine individually. That is true for objects, pointers and shared_ptr. A vector of plain pointers to any of those types also works fine. But a vector of shared_ptr to any of those types fails at runtime..

What kind of registration must be done to achieve this?

Benoit Gagnon

5:26 p.m.

New subject: Serialization of a std::vector< boost::shared_ptr< A> > throws unregistered_class exception

On Mar 19, 9:58 am, "Robert Ramey" wrote:

...

Depending on which version of boost you're using. You may have to include a special macro - look into serialization/shared_ptr.hpp at the end.

Robert Ramey

I'm using Boost 1.34.1. The only macro I see in serialization/shared_ptr.hpp is BOOST_SERIALIZATION_SHARED_PTR. Am I missing something?

...

Benoit Gagnon wrote:

...
Given the following classes:

...
class Building { ... }; class House : public Building { ... }; class Hospital : public Building { ... };

...
With appropriate serialization method templates such as:

...
class House: public Building { friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int version ) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP( Building ); ar & BOOST_SERIALIZATION_NVP( mNumBedrooms ); ar & BOOST_SERIALIZATION_NVP( mNumBathrooms ); } ...

...
I have the following registrations in main.cpp where the archiving/ restoring is performed:

...
BOOST_SERIALIZATION_SHARED_PTR( Building ) BOOST_SERIALIZATION_SHARED_PTR( House ) BOOST_SERIALIZATION_SHARED_PTR( Hospital )

...
In main.ccp, I would like to serialize a std::vector< boost::shared_ptr< Building > > object. Like this:

...
std::vector< boost::shared_ptr< Building > > buildings; ... std::ofstream ofs( "archive.txt" ); boost::archive::text_oarchive oa( ofs ); oa & BOOST_SERIALIZATION_NVP( buildings );

...
This compiles correctly but fails at runtime with a "unregistered_class" exception. The individual classes (Building, House, Hospital) can be serialized and restored fine individually. That is true for objects, pointers and shared_ptr. A vector of plain pointers to any of those types also works fine. But a vector of shared_ptr to any of those types fails at runtime..

...
What kind of registration must be done to achieve this?

_______________________________________________ Boost-users mailing list Boost-us...@lists.boost.orghttp://lists.boost.org/mailman/listinfo.cgi/boost-users

Benoit Gagnon

20 Mar 20 Mar

6:27 p.m.

New subject: Serialization of a std::vector< boost::shared_ptr< A> > throws unregistered_class exception

On Mar 19, 10:26 am, Benoit Gagnon wrote:

...

On Mar 19, 9:58 am, "Robert Ramey" wrote:

...
Depending on which version of boost you're using. You may have to include a special macro - look into serialization/shared_ptr.hpp at the end.

...
Robert Ramey

I'm using Boost 1.34.1. The only macro I see in serialization/shared_ptr.hpp is BOOST_SERIALIZATION_SHARED_PTR.

Am I missing something?

I still haven't figured this out, if anyone has clues... Should I make a wrapper class around the std::vector and implement serialization for it?

...

...
Benoit Gagnon wrote:

...
Given the following classes:

...
...
class Building { ... }; class House : public Building { ... }; class Hospital : public Building { ... };

...
...
With appropriate serialization method templates such as:

...
...
class House: public Building { friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int version ) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP( Building ); ar & BOOST_SERIALIZATION_NVP( mNumBedrooms ); ar & BOOST_SERIALIZATION_NVP( mNumBathrooms ); } ...

...
...
I have the following registrations in main.cpp where the archiving/ restoring is performed:

...
...
BOOST_SERIALIZATION_SHARED_PTR( Building ) BOOST_SERIALIZATION_SHARED_PTR( House ) BOOST_SERIALIZATION_SHARED_PTR( Hospital )

...
...
In main.ccp, I would like to serialize a std::vector< boost::shared_ptr< Building > > object. Like this:

...
...
std::vector< boost::shared_ptr< Building > > buildings; ... std::ofstream ofs( "archive.txt" ); boost::archive::text_oarchive oa( ofs ); oa & BOOST_SERIALIZATION_NVP( buildings );

...
...
This compiles correctly but fails at runtime with a "unregistered_class" exception. The individual classes (Building, House, Hospital) can be serialized and restored fine individually. That is true for objects, pointers and shared_ptr. A vector of plain pointers to any of those types also works fine. But a vector of shared_ptr to any of those types fails at runtime..

...
...
What kind of registration must be done to achieve this?

...
_______________________________________________ Boost-users mailing list Boost-us...@lists.boost.orghttp://lists.boost.org/mailman/listinfo.cgi/boost-users

_______________________________________________ Boost-users mailing list Boost-us...@lists.boost.orghttp://lists.boost.org/mailman/listinfo.cgi/boost-users

Sohail Somani

9:13 p.m.

New subject: Serialization of a std::vector< boost::shared_ptr< A> > throws unregistered_class exception

Benoit Gagnon wrote:

...

On Mar 19, 10:26 am, Benoit Gagnon wrote:

...
On Mar 19, 9:58 am, "Robert Ramey" wrote:

...
Depending on which version of boost you're using. You may have to include a special macro - look into serialization/shared_ptr.hpp at the end. Robert Ramey I'm using Boost 1.34.1. The only macro I see in serialization/shared_ptr.hpp is BOOST_SERIALIZATION_SHARED_PTR.

Am I missing something?

I still haven't figured this out, if anyone has clues... Should I make a wrapper class around the std::vector and implement serialization for it?

Do you have BOOST_CLASS_EXPORT for each class that you are serializing by base class pointer? For example, Hospital. You should have something like: #include class Hospital ...; BOOST_CLASS_EXPORT(Hospital) -- Sohail Somani http://uint32t.blogspot.com

Benoit Gagnon

9:34 p.m.

New subject: Serialization of a std::vector< boost::shared_ptr< A> > throws unregistered_class exception

On Mar 20, 2:13 pm, Sohail Somani wrote:

...

Benoit Gagnon wrote:

...
On Mar 19, 10:26 am, Benoit Gagnon wrote:

...
On Mar 19, 9:58 am, "Robert Ramey" wrote:

...
...
...
Depending on which version of boost you're using. You may have to include a special macro - look into serialization/shared_ptr.hpp at the end. Robert Ramey I'm using Boost 1.34.1. The only macro I see in serialization/shared_ptr.hpp is BOOST_SERIALIZATION_SHARED_PTR.

...
...
Am I missing something?

...
I still haven't figured this out, if anyone has clues... Should I make a wrapper class around the std::vector and implement serialization for it?

Do you have BOOST_CLASS_EXPORT for each class that you are serializing by base class pointer? For example, Hospital. You should have something like:

#include

class Hospital ...;

BOOST_CLASS_EXPORT(Hospital)

That did it, thank you!

...

-- Sohail Somanihttp://uint32t.blogspot.com

_______________________________________________ Boost-users mailing list Boost-us...@lists.boost.orghttp://lists.boost.org/mailman/listinfo.cgi/boost-users

Sohail Somani

21 Mar 21 Mar

2:04 a.m.

New subject: Serialization of a std::vector< boost::shared_ptr< A> > throws unregistered_class exception

Benoit Gagnon wrote:

...

On Mar 20, 2:13 pm, Sohail Somani wrote:

...
...
...
Am I missing something? I still haven't figured this out, if anyone has clues... Should I make a wrapper class around the std::vector and implement serialization for it? Do you have BOOST_CLASS_EXPORT for each class that you are serializing by base class pointer? For example, Hospital. You should have something

Benoit Gagnon wrote: like:

#include

class Hospital ...;

BOOST_CLASS_EXPORT(Hospital)

That did it, thank you!

Great! IMHO, with Boost Serialization, more than others, you really do need to read the *whole* documentation before you write code. It will pay dividends. I'm pretty sure this exact case is covered somewhere in the docs. -- Sohail Somani http://uint32t.blogspot.com

Robert Ramey

6:09 a.m.

New subject: Serialization of a std::vector<boost::shared_ptr< A> > throws unregistered_class exception

Consider including the following BOOST_CLASS_EXPORT(House); BOOST_CLASS_EXPORT(Hospital); Robert Ramey Benoit Gagnon wrote:

...

On Mar 19, 10:26 am, Benoit Gagnon wrote:

...
On Mar 19, 9:58 am, "Robert Ramey" wrote:

...
Depending on which version of boost you're using. You may have to include a special macro - look into serialization/shared_ptr.hpp at the end.

...
Robert Ramey

I'm using Boost 1.34.1. The only macro I see in serialization/shared_ptr.hpp is BOOST_SERIALIZATION_SHARED_PTR.

Am I missing something?

I still haven't figured this out, if anyone has clues... Should I make a wrapper class around the std::vector and implement serialization for it?

...
...
Benoit Gagnon wrote:

...
Given the following classes:

...
...
class Building { ... }; class House : public Building { ... }; class Hospital : public Building { ... };

...
...
With appropriate serialization method templates such as:

...
...
class House: public Building { friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int version ) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP( Building ); ar & BOOST_SERIALIZATION_NVP( mNumBedrooms ); ar & BOOST_SERIALIZATION_NVP( mNumBathrooms ); } ...

...
...
I have the following registrations in main.cpp where the archiving/ restoring is performed:

...
...
BOOST_SERIALIZATION_SHARED_PTR( Building ) BOOST_SERIALIZATION_SHARED_PTR( House ) BOOST_SERIALIZATION_SHARED_PTR( Hospital )

...
...
In main.ccp, I would like to serialize a std::vector< boost::shared_ptr< Building > > object. Like this:

...
...
std::vector< boost::shared_ptr< Building > > buildings; ... std::ofstream ofs( "archive.txt" ); boost::archive::text_oarchive oa( ofs ); oa & BOOST_SERIALIZATION_NVP( buildings );

...
...
This compiles correctly but fails at runtime with a "unregistered_class" exception. The individual classes (Building, House, Hospital) can be serialized and restored fine individually. That is true for objects, pointers and shared_ptr. A vector of plain pointers to any of those types also works fine. But a vector of shared_ptr to any of those types fails at runtime..

...
...
What kind of registration must be done to achieve this?

...
_______________________________________________ Boost-users mailing list Boost-us...@lists.boost.orghttp://lists.boost.org/mailman/listinfo.cgi/boost-users

_______________________________________________ Boost-users mailing list Boost-us...@lists.boost.orghttp://lists.boost.org/mailman/listinfo.cgi/boost-users

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Benoit Gagnon
Robert Ramey
Sohail Somani