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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 <boost/shared_ptr.hpp>
    00047 #include <boost/static_assert.hpp>
    00048 #include <boost/type_traits/is_abstract.hpp>
    00049
    00050 #include <QxFactory/IxFactory.h>
    00051
    00052 #include <QxTraits/get_base_class.h>
    00053 #include <QxTraits/get_class_name.h>
    00054 #include <QxTraits/get_primary_key.h>
    00055
    00056 #define QX_STR_CANNOT_INSTANTIATE_ABSTRACT_CLASS "[QxOrm] qx::QxFactory<T> ---> cannot instantiate abstract class '%s'"
    00057
    00058 #if _QX_AUTO_REGISTER_REPOSITORY
    00059 #define QX_AUTO_REGISTER_REPOSITORY(className, sKey) qx::register_repository< className >(sKey);
    00060 #else // _QX_AUTO_REGISTER_REPOSITORY
    00061 #define QX_AUTO_REGISTER_REPOSITORY(className, sKey) /* Nothing */
    00062 #endif // _QX_AUTO_REGISTER_REPOSITORY
    00063
    00064 namespace qx {
    00065
    00066 template <class T>
    00067 class QxClass;
    00068
    00069 #if _QX_AUTO_REGISTER_REPOSITORY
    00070 template <class T>
    00071 inline void register_repository(const QString & sKey);
    00072 #endif // _QX_AUTO_REGISTER_REPOSITORY
    00073
    00078 template <class T>
    00079 class QxFactory : public IxFactory
    00080 {
    00081
    00082 public:
    00083
    00084    QxFactory(const QString & sKey) : IxFactory(sKey) { QX_AUTO_REGISTER_REPOSITORY(T, sKey); }
    00085    virtual ~QxFactory() { ; }
    00086
    00087    virtual boost::any createObject() const
    00088    { QxClass<T>::getSingleton(); return qxCreateInstance<boost::is_abstract<T>::value, 0>::create(); }
    00089
    00090    virtual void * createObjectNudePtr() const
    00091    { QxClass<T>::getSingleton(); return qxCreateInstance<boost::is_abstract<T>::value, 0>::createNudePtr(); }
    00092
    00093 #ifndef _QX_NO_RTTI
    00094    virtual const std::type_info & typeInfo() const
    00095    { return typeid(T); }
    00096 #endif // _QX_NO_RTTI
    00097
    00098 private:
    00099
    00100    template <bool bIsAbstract /* = false */, int dummy>
    00101    struct qxCreateInstance
    00102    {
    00103       static inline boost::any create()      { qx_shared_ptr<T> ptr; ptr.reset(new T()); return boost::any(ptr); }
    00104       static inline void * createNudePtr()   { return static_cast<void *>(new T()); }
    00105    };
    00106
    00107    template <int dummy>
    00108    struct qxCreateInstance<true, dummy>
    00109    {
    00110       static inline boost::any create()      { qDebug(QX_STR_CANNOT_INSTANTIATE_ABSTRACT_CLASS, qx::trait::get_class_name<T>::get()); return boost::any(); }
    00111       static inline void * createNudePtr()   { qDebug(QX_STR_CANNOT_INSTANTIATE_ABSTRACT_CLASS, qx::trait::get_class_name<T>::get()); return NULL; }
    00112    };
    00113
    00114 };
    00115
    00116 } // namespace qx
    00117
    00118 #include "../../inl/QxFactory/QxFactory.inl"
    00119
    00120 #endif // _QX_FACTORY_H_