285 lines
8.8 KiB
C++
285 lines
8.8 KiB
C++
#ifndef BOOST_SERIALIZATION_EXAMPLE_DEMO_GPS_HPP
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#define BOOST_SERIALIZATION_EXAMPLE_DEMO_GPS_HPP
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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//
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// demo_gps.hpp
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//
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// (C) Copyright 2002-4 Robert Ramey - http://www.rrsd.com .
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <iomanip>
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#include <iostream>
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#include <fstream>
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#include <boost/serialization/string.hpp>
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#include <boost/serialization/nvp.hpp>
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#include <boost/serialization/utility.hpp>
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#include <boost/serialization/list.hpp>
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#include <boost/serialization/version.hpp>
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#include <boost/serialization/assume_abstract.hpp>
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// This illustration models the bus system of a small city.
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// This includes, multiple bus stops, bus routes and schedules.
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// There are different kinds of stops. Bus stops in general will
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// will appear on multiple routes. A schedule will include
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// muliple trips on the same route.
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/////////////////////////////////////////////////////////////
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// gps coordinate
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//
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// llustrates serialization for a simple type
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//
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class gps_position
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{
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friend class boost::serialization::access;
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friend std::ostream & operator<<(std::ostream &os, const gps_position &gp);
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int degrees;
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int minutes;
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float seconds;
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template<class Archive>
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void serialize(Archive & ar, const unsigned int /* file_version */){
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ar & BOOST_SERIALIZATION_NVP(degrees)
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& BOOST_SERIALIZATION_NVP(minutes)
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& BOOST_SERIALIZATION_NVP(seconds);
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}
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public:
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// every serializable class needs a constructor
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gps_position(){};
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gps_position(int _d, int _m, float _s) :
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degrees(_d), minutes(_m), seconds(_s)
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{}
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};
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std::ostream & operator<<(std::ostream &os, const gps_position &gp)
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{
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return os << ' ' << gp.degrees << (unsigned char)186 << gp.minutes << '\'' << gp.seconds << '"';
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}
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/////////////////////////////////////////////////////////////
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// One bus stop
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//
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// illustrates serialization of serializable members
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//
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class bus_stop
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{
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friend class boost::serialization::access;
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virtual std::string description() const = 0;
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gps_position latitude;
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gps_position longitude;
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template<class Archive>
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void serialize(Archive &ar, const unsigned int version)
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{
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ar & BOOST_SERIALIZATION_NVP(latitude);
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ar & BOOST_SERIALIZATION_NVP(longitude);
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}
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protected:
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bus_stop(const gps_position & _lat, const gps_position & _long) :
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latitude(_lat), longitude(_long)
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{}
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public:
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bus_stop(){}
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friend std::ostream & operator<<(std::ostream &os, const bus_stop &gp);
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virtual ~bus_stop(){}
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};
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BOOST_SERIALIZATION_ASSUME_ABSTRACT(bus_stop)
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std::ostream & operator<<(std::ostream &os, const bus_stop &bs)
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{
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return os << bs.latitude << bs.longitude << ' ' << bs.description();
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}
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/////////////////////////////////////////////////////////////
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// Several kinds of bus stops
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//
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// illustrates serialization of derived types
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//
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class bus_stop_corner : public bus_stop
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{
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friend class boost::serialization::access;
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std::string street1;
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std::string street2;
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virtual std::string description() const
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{
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return street1 + " and " + street2;
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}
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template<class Archive>
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void serialize(Archive &ar, const unsigned int version)
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{
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// save/load base class information
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ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(bus_stop);
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ar & BOOST_SERIALIZATION_NVP(street1);
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ar & BOOST_SERIALIZATION_NVP(street2);
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}
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public:
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bus_stop_corner(){}
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bus_stop_corner(const gps_position & _lat, const gps_position & _long,
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const std::string & _s1, const std::string & _s2
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) :
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bus_stop(_lat, _long), street1(_s1), street2(_s2)
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{
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}
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};
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class bus_stop_destination : public bus_stop
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{
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friend class boost::serialization::access;
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std::string name;
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virtual std::string description() const
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{
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return name;
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}
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template<class Archive>
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void serialize(Archive &ar, const unsigned int version)
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{
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ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(bus_stop)
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& BOOST_SERIALIZATION_NVP(name);
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}
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public:
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bus_stop_destination(){}
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bus_stop_destination(
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const gps_position & _lat, const gps_position & _long, const std::string & _name
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) :
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bus_stop(_lat, _long), name(_name)
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{
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}
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};
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/////////////////////////////////////////////////////////////
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// a bus route is a collection of bus stops
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//
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// illustrates serialization of STL collection templates.
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//
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// illustrates serialzation of polymorphic pointer (bus stop *);
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//
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// illustrates storage and recovery of shared pointers is correct
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// and efficient. That is objects pointed to by more than one
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// pointer are stored only once. In such cases only one such
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// object is restored and pointers are restored to point to it
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//
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class bus_route
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{
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friend class boost::serialization::access;
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friend std::ostream & operator<<(std::ostream &os, const bus_route &br);
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typedef bus_stop * bus_stop_pointer;
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std::list<bus_stop_pointer> stops;
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template<class Archive>
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void serialize(Archive &ar, const unsigned int version)
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{
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// in this program, these classes are never serialized directly but rather
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// through a pointer to the base class bus_stop. So we need a way to be
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// sure that the archive contains information about these derived classes.
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//ar.template register_type<bus_stop_corner>();
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ar.register_type(static_cast<bus_stop_corner *>(NULL));
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//ar.template register_type<bus_stop_destination>();
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ar.register_type(static_cast<bus_stop_destination *>(NULL));
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// serialization of stl collections is already defined
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// in the header
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ar & BOOST_SERIALIZATION_NVP(stops);
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}
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public:
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bus_route(){}
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void append(bus_stop *_bs)
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{
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stops.insert(stops.end(), _bs);
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}
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};
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std::ostream & operator<<(std::ostream &os, const bus_route &br)
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{
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std::list<bus_stop *>::const_iterator it;
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// note: we're displaying the pointer to permit verification
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// that duplicated pointers are properly restored.
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for(it = br.stops.begin(); it != br.stops.end(); it++){
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os << '\n' << std::hex << "0x" << *it << std::dec << ' ' << **it;
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}
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return os;
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}
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/////////////////////////////////////////////////////////////
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// a bus schedule is a collection of routes each with a starting time
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//
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// Illustrates serialization of STL objects(pair) in a non-intrusive way.
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// See definition of operator<< <pair<F, S> >(ar, pair)
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//
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// illustrates nesting of serializable classes
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//
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// illustrates use of version number to automatically grandfather older
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// versions of the same class.
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class bus_schedule
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{
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friend class boost::serialization::access;
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friend std::ostream & operator<<(std::ostream &os, const bus_schedule &bs);
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template<class Archive>
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void serialize(Archive &ar, const unsigned int version)
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{
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ar & BOOST_SERIALIZATION_NVP(schedule);
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}
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// note: this structure was made public. because the friend declarations
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// didn't seem to work as expected.
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public:
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struct trip_info
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{
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template<class Archive>
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void serialize(Archive &ar, const unsigned int file_version)
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{
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// in versions 2 or later
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if(file_version >= 2)
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// read the drivers name
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ar & BOOST_SERIALIZATION_NVP(driver);
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// all versions have the follwing info
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ar & BOOST_SERIALIZATION_NVP(hour)
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& BOOST_SERIALIZATION_NVP(minute);
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}
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// starting time
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int hour;
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int minute;
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// only after system shipped was the driver's name added to the class
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std::string driver;
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trip_info(){}
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trip_info(int _h, int _m, const std::string &_d) :
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hour(_h), minute(_m), driver(_d)
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{}
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~trip_info(){
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}
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};
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// friend std::ostream & operator<<(std::ostream &os, const trip_info &ti);
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private:
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std::list<std::pair<trip_info, bus_route *> > schedule;
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public:
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void append(const std::string &_d, int _h, int _m, bus_route *_br)
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{
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schedule.insert(schedule.end(), std::make_pair(trip_info(_h, _m, _d), _br));
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}
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bus_schedule(){}
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};
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BOOST_CLASS_VERSION(bus_schedule::trip_info, 3)
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BOOST_CLASS_VERSION(bus_schedule, 2)
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std::ostream & operator<<(std::ostream &os, const bus_schedule::trip_info &ti)
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{
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return os << '\n' << ti.hour << ':' << ti.minute << ' ' << ti.driver << ' ';
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}
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std::ostream & operator<<(std::ostream &os, const bus_schedule &bs)
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{
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std::list<std::pair<bus_schedule::trip_info, bus_route *> >::const_iterator it;
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for(it = bs.schedule.begin(); it != bs.schedule.end(); it++){
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os << it->first << *(it->second);
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}
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return os;
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}
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#endif // BOOST_SERIALIZATION_EXAMPLE_DEMO_GPS_HPP
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