Re: [Boost-users] Serialization of pointers ? --> loadingnotworking...

15 Jan 2010


      I should maybe have attached with the message this more reduced code 
containing only the problematic classes.

This code fails as previously said during compilation because of the 
"loadFromFileSens"

CODE

/*
 * SensorReading
 *
 */
class Sensor{
    public:
        Sensor(const std::string& name="");
        virtual ~Sensor();
        inline std::string getName() const {return m_name;}
        inline void setName(const std::string& name) {m_name=name;}

        friend class boost::serialization::access;
        template <class Archive> void serialize(Archive& ar, const unsigned 
int version){
            ar & m_name;
        }
    protected:
        std::string m_name;
};
Sensor::Sensor(const std::string& name){
    m_name=name;
}
Sensor::~Sensor(){
}

class SensorReading{
    public:
        SensorReading(const Sensor* s=0, double time=0);
        virtual ~SensorReading();
        inline double getTime() const {return m_time;}
        inline void setTime(double t) {m_time=t;}
        inline const Sensor* getSensor() const {return m_sensor;}
        inline void print(){
            cout << "(" << m_time << "," << m_sensor->getName() << ")" << 
endl;
        }
        friend class boost::serialization::access;
        template <class Archive> void serialize(Archive& ar, const unsigned 
int version){
            ar & m_time & m_sensor;
        }

    protected:
        double m_time;
        const Sensor* m_sensor;

};
SensorReading::SensorReading(const Sensor* s, double t){
    m_sensor=s;
    m_time=t;
}
SensorReading::~SensorReading(){}


template <class A> void saveIntoFileSens(SensorReading& sr, const char* 
file){
        ofstream ofile(file);
        A ar(ofile);
        ar << sr;
        ofile.close();
}
template <class A> void loadFromFileSens(SensorReading& sr, const char* 
file){
    ifstream ifile(file);
    A ar(ifile);
    ar >> sr;
    ifile.close();
}

/*
 * MAIN
 *
 */
int main(){

    Sensor s = Sensor("SensorNom");
    SensorReading senr = SensorReading(&s,67);

    saveIntoFileSens(senr, "out.txt");
    loadFromFileSens(senr, "out.txt");

    return 0;
}


----- Original Message ----- 
From: "Simon Ruffieux" 
Newsgroups: gmane.comp.lib.boost.user
To: 
Sent: Friday, January 15, 2010 9:04 AM
Subject: Re: Serialization of pointers ? --> loadingnotworking...
...
Thanks for your quick answer !
But the orientedPoints do work do work perfectly ! (Even without 
specifying the derived class)
The problem is with the pointer to Sensor* contained in the SensorReading 
class .... And it seems to me this is not a derived class ....
I'll keep trying ...
----- Original Message ----- 
From: "Robert Ramey" 
Newsgroups: gmane.comp.lib.boost.user
To: 
Sent: Thursday, January 14, 2010 5:56 PM
Subject: Re: Serialization of pointers ? --> loading notworking...
...
replace
   friend class boost::serialization::access;
   template <class Archive> void serialize(Archive& ar, const unsigned 
int version){
       ar & this->x & this->y & theta;
   }
with something like:
   friend class boost::serialization::access;
   template <class Archive> void serialize(Archive& ar, const unsigned 
int version){
       ar & boost::serialization::base_object(*this);
   }
Look through the documentation and samples on how to serialize derived 
classes.
Robert Ramey