QxOrm  1.4.4
C++ Object Relational Mapping library
QxFactory.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 :
00028 ** contact@qxorm.com
00029 **
00030 ****************************************************************************/
00031 
00032 #ifndef _QX_FACTORY_H_
00033 #define _QX_FACTORY_H_
00034 
00035 #ifdef _MSC_VER
00036 #pragma once
00037 #endif
00038 
00046 #include <QxFactory/IxFactory.h>
00047 
00048 #include <QxTraits/get_base_class.h>
00049 #include <QxTraits/get_class_name.h>
00050 #include <QxTraits/get_primary_key.h>
00051 
00052 #define QX_STR_CANNOT_INSTANTIATE_ABSTRACT_CLASS "[QxOrm] qx::QxFactory<T> ---> cannot instantiate abstract class '%s'"
00053 
00054 #if _QX_AUTO_REGISTER_REPOSITORY
00055 #define QX_AUTO_REGISTER_REPOSITORY(className, sKey) qx::register_repository< className >(sKey);
00056 #else // _QX_AUTO_REGISTER_REPOSITORY
00057 #define QX_AUTO_REGISTER_REPOSITORY(className, sKey) /* Nothing */
00058 #endif // _QX_AUTO_REGISTER_REPOSITORY
00059 
00060 namespace qx {
00061 
00062 template <class T>
00063 class QxClass;
00064 
00065 #if _QX_AUTO_REGISTER_REPOSITORY
00066 template <class T>
00067 inline void register_repository(const QString & sKey);
00068 #endif // _QX_AUTO_REGISTER_REPOSITORY
00069 
00074 template <class T>
00075 class QxFactory : public IxFactory
00076 {
00077 
00078 public:
00079 
00080    QxFactory(const QString & sKey) : IxFactory(sKey) { QX_AUTO_REGISTER_REPOSITORY(T, sKey); }
00081    virtual ~QxFactory() { ; }
00082 
00083    virtual qx::any createObject() const
00084    { QxClass<T>::getSingleton(); return qxCreateInstance<std::is_abstract<T>::value, 0>::create(); }
00085 
00086    virtual void * createObjectNudePtr() const
00087    { QxClass<T>::getSingleton(); return qxCreateInstance<std::is_abstract<T>::value, 0>::createNudePtr(); }
00088 
00089 #ifndef _QX_NO_RTTI
00090    virtual const std::type_info & typeInfo() const
00091    { return typeid(T); }
00092 #endif // _QX_NO_RTTI
00093 
00094 private:
00095 
00096    template <bool bIsAbstract /* = false */, int dummy>
00097    struct qxCreateInstance
00098    {
00099       static inline qx::any create()      { std::shared_ptr<T> ptr; ptr.reset(new T()); return qx::any(ptr); }
00100       static inline void * createNudePtr()   { return static_cast<void *>(new T()); }
00101    };
00102 
00103    template <int dummy>
00104    struct qxCreateInstance<true, dummy>
00105    {
00106       static inline qx::any create()      { qDebug(QX_STR_CANNOT_INSTANTIATE_ABSTRACT_CLASS, qx::trait::get_class_name<T>::get()); return qx::any(); }
00107       static inline void * createNudePtr()   { qDebug(QX_STR_CANNOT_INSTANTIATE_ABSTRACT_CLASS, qx::trait::get_class_name<T>::get()); return NULL; }
00108    };
00109 
00110 };
00111 
00112 } // namespace qx
00113 
00114 #include "../../inl/QxFactory/QxFactory.inl"
00115 
00116 #endif // _QX_FACTORY_H_