/****************************************************************************
**
** 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
**
****************************************************************************/

#ifdef _QX_ENABLE_BOOST_SERIALIZATION
#ifndef _QX_SERIALIZE_QSHAREDPOINTER_H_
#define _QX_SERIALIZE_QSHAREDPOINTER_H_

#ifdef _MSC_VER
#pragma once
#endif

#include <boost/serialization/serialization.hpp>
#include <boost/serialization/split_free.hpp>
#include <boost/serialization/nvp.hpp>

#include <QtCore/qsharedpointer.h>
#include <QtCore/QWeakPointer>
#include <QtCore/qhash.h>

namespace boost
{
   namespace serialization
   {

      template <class Archive, typename T>
      inline void save(Archive &ar, const QSharedPointer<T> &t, const unsigned int file_version)
      {
         Q_UNUSED(file_version);
         const T *ptr = t.data();
         ar << boost::serialization::make_nvp("qt_shared_ptr", ptr);
      }

      template <class Archive, typename T>
      inline void load(Archive &ar, QSharedPointer<T> &t, const unsigned int file_version)
      {
         Q_UNUSED(file_version);
         static QHash<void *, QWeakPointer<T>> listOfWeakPointers;
         T *ptr = NULL;
         ar >> boost::serialization::make_nvp("qt_shared_ptr", ptr);
         if (!ptr)
         {
            t = QSharedPointer<T>();
            return;
         }

         void *pVoid = static_cast<void *>(ptr);
         QSharedPointer<T> pShared = (listOfWeakPointers.contains(pVoid) ? listOfWeakPointers.value(pVoid).toStrongRef() : QSharedPointer<T>());
         if (pShared)
         {
            t = pShared;
            return;
         }
         t = QSharedPointer<T>(ptr);
         QWeakPointer<T> pWeak = t;
         listOfWeakPointers.insert(pVoid, pWeak);

         static int iLoadCount = 0;
         iLoadCount++;
         if (iLoadCount <= 1000)
         {
            return;
         }
         QMutableHashIterator<void *, QWeakPointer<T>> itr(listOfWeakPointers);
         while (itr.hasNext())
         {
            itr.next();
            if (itr.value().isNull())
            {
               itr.remove();
            }
         }
         iLoadCount = 0;
      }

      template <class Archive, typename T>
      inline void serialize(Archive &ar, QSharedPointer<T> &t, const unsigned int file_version)
      {
         boost::serialization::split_free(ar, t, file_version);
      }

   } // namespace boost
} // namespace serialization

#endif // _QX_SERIALIZE_QSHAREDPOINTER_H_
#endif // _QX_ENABLE_BOOST_SERIALIZATION
