QxOrm  1.2.9
C++ Object Relational Mapping library
QxAnyCastDynamic.h
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00001 /****************************************************************************
00002 **
00003 ** http://www.qxorm.com/
00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
00005 **
00006 ** This file is part of the QxOrm library
00007 **
00008 ** This software is provided 'as-is', without any express or implied
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00011 **
00012 ** Commercial Usage
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00016 ** a written agreement between you and Lionel Marty
00017 **
00018 ** GNU General Public License Usage
00019 ** Alternatively, this file may be used under the terms of the GNU
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00031 
00032 #ifndef _QX_ANY_CAST_DYNAMIC_H_
00033 #define _QX_ANY_CAST_DYNAMIC_H_
00034 
00035 #ifdef _MSC_VER
00036 #pragma once
00037 #endif
00038 
00046 #include <boost/any.hpp>
00047 #include <boost/shared_ptr.hpp>
00048 
00049 #include <QtCore/qsharedpointer.h>
00050 
00051 #include <QxDao/QxDaoPointer.h>
00052 
00053 namespace qx {
00054 
00055 template <typename T>
00056 struct any_cast_dynamic
00057 { static T get(const boost::any & a) { return boost::any_cast<T>(a); } };
00058 
00059 template <typename T>
00060 struct any_cast_dynamic<T *>
00061 {
00062    static T * get(const boost::any & a)
00063    {
00064       if (a.empty()) { return NULL; }
00065       boost::any * b = const_cast<boost::any *>(& a);
00066       T ** t = boost::unsafe_any_cast<T *>(b);
00067       if (! t) { return NULL; }
00068       return (* t);
00069    }
00070 };
00071 
00072 template <typename T>
00073 struct any_cast_dynamic< boost::shared_ptr<T> >
00074 {
00075    static boost::shared_ptr<T> get(const boost::any & a)
00076    {
00077       if (a.empty()) { return boost::shared_ptr<T>(); }
00078       boost::any * b = const_cast<boost::any *>(& a);
00079       boost::shared_ptr<T> * t = boost::unsafe_any_cast< boost::shared_ptr<T> >(b);
00080       if (! t) { return boost::shared_ptr<T>(); }
00081       return (* t);
00082    }
00083 };
00084 
00085 template <typename T>
00086 struct any_cast_dynamic< QSharedPointer<T> >
00087 {
00088    static QSharedPointer<T> get(const boost::any & a)
00089    {
00090       if (a.empty()) { return QSharedPointer<T>(); }
00091       boost::any * b = const_cast<boost::any *>(& a);
00092       QSharedPointer<T> * t = boost::unsafe_any_cast< QSharedPointer<T> >(b);
00093       if (! t) { return QSharedPointer<T>(); }
00094       return (* t);
00095    }
00096 };
00097 
00098 template <typename T>
00099 struct any_cast_dynamic< qx::dao::ptr<T> >
00100 {
00101    static qx::dao::ptr<T> get(const boost::any & a)
00102    {
00103       if (a.empty()) { return qx::dao::ptr<T>(); }
00104       boost::any * b = const_cast<boost::any *>(& a);
00105       qx::dao::ptr<T> * t = boost::unsafe_any_cast< qx::dao::ptr<T> >(b);
00106       if (! t) { return qx::dao::ptr<T>(); }
00107       return (* t);
00108    }
00109 };
00110 
00111 } // namespace qx
00112 
00113 #endif // _QX_ANY_CAST_DYNAMIC_H_