EvolvingObjects
pickle.h
00001 /*
00002     PyEO
00003 
00004     Copyright (C) 2003 Maarten Keijzer
00005 
00006     This program is free software; you can redistribute it and/or modify
00007     it under the terms of the GNU General Public License as published by
00008     the Free Software Foundation; either version 2 of the License, or
00009     (at your option) any later version.
00010 
00011     This program is distributed in the hope that it will be useful,
00012     but WITHOUT ANY WARRANTY; without even the implied warranty of
00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014     GNU General Public License for more details.
00015 
00016     You should have received a copy of the GNU General Public License
00017     along with this program; if not, write to the Free Software
00018     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019 */
00020 
00021 #ifndef PICKLE_H
00022 #define PICKLE_h
00023 
00024 // #ifndef WIN32
00025 // #include <config.h>
00026 // #endif
00027 
00028 #include <boost/python.hpp>
00029 #include <sstream>
00032 template <class T>
00033 struct T_pickle_suite : boost::python::pickle_suite
00034 {
00035     static
00036     std::string print_to_string(const T& t)
00037     {
00038         std::ostringstream os;
00039         t.printOn(os);
00040         os << std::ends;
00041         return os.str();
00042     }
00043 
00044     static
00045     boost::python::tuple getstate(const T& t)
00046     {
00047         std::string s = print_to_string(t);
00048         return boost::python::make_tuple( boost::python::str(s));
00049     }
00050 
00051     static
00052     void setstate(T& t, boost::python::tuple pickled)
00053     {
00054         std::string s = boost::python::extract<std::string>(pickled[0]);
00055         std::istringstream is(s);
00056         t.readFrom(is);
00057     }
00058 };
00059 
00063 template <class Persistent, class X1, class X2, class X3>
00064 boost::python::class_<Persistent, X1, X2, X3>& pickle(boost::python::class_<Persistent, X1, X2, X3>& c)
00065 {
00066     return c.def_pickle(T_pickle_suite<Persistent>())
00067         .def("__str__", T_pickle_suite<Persistent>::print_to_string);
00068 }
00069 
00070 #endif
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