PickleTypeConverter.h

00001 /*
00002  * This source file is part of libRocket, the HTML/CSS Interface Middleware
00003  *
00004  * For the latest information, see http://www.librocket.com
00005  *
00006  * Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
00007  *
00008  * Permission is hereby granted, free of charge, to any person obtaining a copy
00009  * of this software and associated documentation files (the "Software"), to deal
00010  * in the Software without restriction, including without limitation the rights
00011  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00012  * copies of the Software, and to permit persons to whom the Software is
00013  * furnished to do so, subject to the following conditions:
00014  *
00015  * The above copyright notice and this permission notice shall be included in
00016  * all copies or substantial portions of the Software.
00017  * 
00018  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00019  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00020  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00021  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00022  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00023  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00024  * THE SOFTWARE.
00025  *
00026  */
00027 
00028 #ifndef ROCKETCOREPICKLETYPECONVERTER_H
00029 #define ROCKETCOREPICKLETYPECONVERTER_H
00030 
00031 #include <Rocket/Core/TypeConverter.h>
00032 
00033 namespace Rocket {
00034 namespace Core {
00035 namespace Python {
00036 
00043 template <typename T>
00044 class PickleTypeConverter : public python::pickle_suite
00045 {
00046 public: 
00047         static python::tuple getstate(python::object obj)
00048         {
00049                 T& object = python::extract<T&>(obj)();
00050                 
00051                 String buffer;
00052                 TypeConverter< T, String >::Convert(object, buffer);
00053 
00054                 return python::make_tuple(buffer.CString());
00055         }
00056 
00057         static void setstate(python::object obj, python::tuple state)
00058         {
00059                 T& object = python::extract< T& >(obj)();       
00060 
00061                 int len = python::extract< int >(state.attr( "__len__" )());
00062                 if (len != 1)
00063                 {
00064                         PyErr_SetObject(PyExc_ValueError,
00065                                                         ("expected 1-item tuple in call to __setstate__; got %s"
00066                                                         % state).ptr()
00067                                 );
00068                         python::throw_error_already_set();
00069                 }
00070                 
00071                 const char* cstring = python::extract<const char*>(state[0]);
00072                 String string(cstring);
00073                 TypeConverter<String, T>::Convert(string, object);
00074         }
00075 
00076         static bool getstate_manages_dict()
00077         {
00078                 // Tell boost we've taken care of the dictionary
00079                 return true; 
00080         }
00081 };
00082 
00083 }
00084 }
00085 }
00086 
00087 #endif