QxOrm  1.3.2
C++ Object Relational Mapping library
construct_ptr.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
00009 ** warranty. In no event will the authors be held liable for any
00010 ** damages arising from the use of this software
00011 **
00012 ** Commercial Usage
00013 ** Licensees holding valid commercial QxOrm licenses may use this file in
00014 ** accordance with the commercial license agreement provided with the
00015 ** Software or, alternatively, in accordance with the terms contained in
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
00020 ** General Public License version 3.0 as published by the Free Software
00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the
00022 ** packaging of this file. Please review the following information to
00023 ** ensure the GNU General Public License version 3.0 requirements will be
00024 ** met : http://www.gnu.org/copyleft/gpl.html
00025 **
00026 ** If you are unsure which license is appropriate for your use, or
00027 ** if you have questions regarding the use of this file, please contact :
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00031 
00032 #ifndef _QX_CONSTRUCT_PTR_H_
00033 #define _QX_CONSTRUCT_PTR_H_
00034 
00035 #ifdef _MSC_VER
00036 #pragma once
00037 #endif
00038 
00046 #include <boost/scoped_ptr.hpp>
00047 #include <boost/shared_ptr.hpp>
00048 #include <boost/intrusive_ptr.hpp>
00049 #include <boost/type_traits/is_abstract.hpp>
00050 #include <boost/type_traits/remove_pointer.hpp>
00051 
00052 #include <QtCore/qsharedpointer.h>
00053 
00054 #if (QT_VERSION >= 0x040600)
00055 #include <QtCore/qscopedpointer.h>
00056 #endif // (QT_VERSION >= 0x040600)
00057 
00058 #ifdef _QX_CPP_11_SMART_PTR
00059 #ifndef BOOST_NO_CXX11_SMART_PTR
00060 #include <memory>
00061 #endif // BOOST_NO_CXX11_SMART_PTR
00062 #endif // _QX_CPP_11_SMART_PTR
00063 
00064 #include <QxDao/QxDaoPointer.h>
00065 
00066 namespace qx {
00067 namespace trait {
00068 
00073 template <typename T>
00074 struct construct_ptr
00075 {
00076 
00077 private:
00078 
00079    typedef typename boost::remove_pointer<T>::type type_ptr;
00080 
00081 public:
00082 
00083    static inline void get(T & t)
00084    { new_ptr<boost::is_abstract<type_ptr>::value, 0>::get(t); }
00085 
00086 private:
00087 
00088    template <bool isAbstract /* = false */, int dummy>
00089    struct new_ptr
00090    { static inline void get(T & t) { t = new type_ptr(); } };
00091 
00092    template <int dummy>
00093    struct new_ptr<true, dummy>
00094    { static inline void get(T & t) { Q_UNUSED(t); qDebug("[QxOrm] qx::trait::construct_ptr<T> : %s", "cannot instantiate abstract class"); } };
00095 
00096 };
00097 
00098 template <typename T>
00099 struct construct_ptr< boost::scoped_ptr<T> >
00100 { static inline void get(boost::scoped_ptr<T> & t) { t.reset(new T()); } };
00101 
00102 template <typename T>
00103 struct construct_ptr< boost::shared_ptr<T> >
00104 { static inline void get(boost::shared_ptr<T> & t) { t.reset(new T()); } };
00105 
00106 template <typename T>
00107 struct construct_ptr< boost::intrusive_ptr<T> >
00108 { static inline void get(boost::intrusive_ptr<T> & t) { t.reset(new T()); } };
00109 
00110 template <typename T>
00111 struct construct_ptr< QSharedPointer<T> >
00112 { static inline void get(QSharedPointer<T> & t) { t = QSharedPointer<T>(new T()); } };
00113 
00114 #if (QT_VERSION >= 0x040600)
00115 template <typename T>
00116 struct construct_ptr< QScopedPointer<T> >
00117 { static inline void get(QScopedPointer<T> & t) { t = QScopedPointer<T>(new T()); } };
00118 #endif // (QT_VERSION >= 0x040600)
00119 
00120 template <typename T>
00121 struct construct_ptr< qx::dao::ptr<T> >
00122 { static inline void get(qx::dao::ptr<T> & t) { t = qx::dao::ptr<T>(new T()); } };
00123 
00124 #ifdef _QX_CPP_11_SMART_PTR
00125 #ifndef BOOST_NO_CXX11_SMART_PTR
00126 
00127 template <typename T>
00128 struct construct_ptr< std::unique_ptr<T> >
00129 { static inline void get(std::unique_ptr<T> & t) { t.reset(new T()); } };
00130 
00131 template <typename T>
00132 struct construct_ptr< std::shared_ptr<T> >
00133 { static inline void get(std::shared_ptr<T> & t) { t.reset(new T()); } };
00134 
00135 #endif // BOOST_NO_CXX11_SMART_PTR
00136 #endif // _QX_CPP_11_SMART_PTR
00137 
00138 } // namespace trait
00139 } // namespace qx
00140 
00141 #endif // _QX_CONSTRUCT_PTR_H_