/****************************************************************************
**
** https://www.qxorm.com/
** Copyright (C) 2013 XDL Team (ic-east.com)
**
** This file is part of the QxOrm library
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any
** damages arising from the use of this software
**
** Commercial Usage
** Licensees holding valid commercial QxOrm licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and XDL Team
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file 'license.gpl3.txt' included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met : http://www.gnu.org/copyleft/gpl.html
**
** If you are unsure which license is appropriate for your use, or
** if you have questions regarding the use of this file, please contact :
** ic-east.com
**
****************************************************************************/

#ifndef _QX_GET_BASE_CLASS_H_
#define _QX_GET_BASE_CLASS_H_

#ifdef _MSC_VER
#pragma once
#endif

/*!
 * \file get_base_class.h
 * \author XDL Team
 * \ingroup QxTraits
 * \brief qx::trait::get_base_class<T>::type : retrieve base class of type T registered into QxOrm context and return qx::trait::no_base_class_defined if no base class defined
 */

#include <QxTraits/get_class_name.h>

namespace qx
{
    namespace trait
    {

        class no_base_class_defined
        {
        public:
            no_base_class_defined() { ; };
            virtual ~no_base_class_defined() { ; };
            virtual void dummy() = 0;
        };

        /*!
         * \ingroup QxTraits
         * \brief qx::trait::get_base_class<T>::type : retrieve base class of type T registered into QxOrm context and return qx::trait::no_base_class_defined if no base class defined
         */
        template <class T>
        class get_base_class
        {
        public:
            typedef qx::trait::no_base_class_defined type;
        };

        template <class T>
        class is_base_class_defined
        {
        public:
            enum
            {
                value = (std::is_same<typename qx::trait::get_base_class<T>::type, qx::trait::no_base_class_defined>::value ? 0 : 1)
            };
        };

        template <class T>
        class get_base_class_2
        {
        private:
            typedef typename qx::trait::get_base_class<T>::type type_base;

        private:
            enum
            {
                is_base_ok = (std::is_same<type_base, qx::trait::no_base_class_defined>::value ? 0 : 1)
            };

        public:
            typedef typename std::conditional<is_base_ok, type_base, T>::type type;
        };

    } // namespace trait
} // namespace qx

QX_REGISTER_CLASS_NAME(qx::trait::no_base_class_defined)

#define QX_REGISTER_BASE_CLASS(derivedClass, baseClass) \
    namespace qx                                        \
    {                                                   \
        namespace trait                                 \
        {                                               \
            template <>                                 \
            class get_base_class<derivedClass>          \
            {                                           \
            public:                                     \
                typedef baseClass type;                 \
            };                                          \
        }                                               \
    } // namespace qx::trait

#define QX_GET_BASE_CLASS(T) qx::trait::get_base_class<T>::type
#define QX_GET_BASE_CLASS_WITH_TYPENAME(T) qx::trait::get_base_class<typename T>::type
#define QX_IS_BASE_CLASS_DEFINED(T) qx::trait::is_base_class_defined<T>::value
#define QX_IS_BASE_CLASS_DEFINED_WITH_TYPENAME(T) qx::trait::is_base_class_defined<typename T>::value
#define QX_GET_BASE_CLASS_2(T) qx::trait::get_base_class_2<T>::type
#define QX_GET_BASE_CLASS_2_WITH_TYPENAME(T) qx::trait::get_base_class_2<typename T>::type

#endif // _QX_GET_BASE_CLASS_H_
