XdlOrm/include/QxDao/QxDao_IsDirty.h

/****************************************************************************
**
** 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 :
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****************************************************************************/

#ifndef _QX_DAO_IS_DIRTY_H_
#define _QX_DAO_IS_DIRTY_H_

#ifdef _MSC_VER
#pragma once
#endif

#include <QtCore/qstringlist.h>

#include <QxDao/QxSqlQueryBuilder.h>
#include <QxDao/IxSqlRelation.h>

#include <QxTraits/is_qx_registered.h>
#include <QxTraits/is_container.h>
#include <QxTraits/is_smart_ptr.h>
#include <QxTraits/generic_container.h>

namespace qx
{
   namespace dao
   {
      namespace detail
      {

         template <class T>
         inline void is_dirty(const T &obj1, const T &obj2, QStringList &lstDiff);

         template <class T>
         struct QxDao_IsDirty_Generic
         {

            static void compare(const T &obj1, const T &obj2, QStringList &lstDiff)
            {
               static_assert(qx::trait::is_qx_registered<T>::value, "qx::trait::is_qx_registered<T>::value");

               qx::QxSqlQueryBuilder_Count<T> builder;
               builder.init();
               qx::IxDataMember *pId = builder.getDataId();
               if (pId && (!pId->isEqual((&obj1), (&obj2))))
               {
                  lstDiff.append(pId->getKey());
               }

               long l = 0;
               qx::IxDataMember *p = NULL;
               while ((p = builder.nextData(l)))
               {
                  if (p && (!p->isEqual((&obj1), (&obj2))))
                  {
                     lstDiff.append(p->getKey());
                  }
               }
            }
         };

         template <class T>
         struct QxDao_IsDirty_Container
         {

            static void compare(const T &obj1, const T &obj2, QStringList &lstDiff)
            {
               if (qx::trait::generic_container<T>::size(obj1) <= 0)
               {
                  return;
               }
               if (qx::trait::generic_container<T>::size(obj1) != qx::trait::generic_container<T>::size(obj2))
               {
                  lstDiff.append("*");
                  return;
               }

               long lCurrIndex = 0;
               typename T::const_iterator it2 = obj2.begin();

               for (typename T::const_iterator it1 = obj1.begin(); it1 != obj1.end(); ++it1)
               {
                  QStringList lstDiffItem;
                  qx::dao::detail::is_dirty((*it1), (*it2), lstDiffItem);
                  if (lstDiffItem.count() > 0)
                  {
                     lstDiff.append(QString::number(lCurrIndex) + "|" + lstDiffItem.join("|"));
                  }
                  ++lCurrIndex;
                  ++it2;
               }
            }
         };

         template <class T>
         struct QxDao_IsDirty_Ptr
         {

            static void compare(const T &obj1, const T &obj2, QStringList &lstDiff)
            {
               qx::dao::detail::is_dirty((*obj1), (*obj2), lstDiff);
            }
         };

         template <class T>
         struct QxDao_IsDirty
         {

            static void compare(const T &obj1, const T &obj2, QStringList &lstDiff)
            {
               typedef typename std::conditional<std::is_pointer<T>::value, qx::dao::detail::QxDao_IsDirty_Ptr<T>, qx::dao::detail::QxDao_IsDirty_Generic<T>>::type type_dao_1;
               typedef typename std::conditional<qx::trait::is_smart_ptr<T>::value, qx::dao::detail::QxDao_IsDirty_Ptr<T>, type_dao_1>::type type_dao_2;
               typedef typename std::conditional<qx::trait::is_container<T>::value, qx::dao::detail::QxDao_IsDirty_Container<T>, type_dao_2>::type type_dao_3;
               type_dao_3::compare(obj1, obj2, lstDiff);
            }
         };

         template <class T>
         inline void is_dirty(const T &obj1, const T &obj2, QStringList &lstDiff)
         {
            return qx::dao::detail::QxDao_IsDirty<T>::compare(obj1, obj2, lstDiff);
         }

      } // namespace detail
   } // namespace dao
} // namespace qx

#endif // _QX_DAO_IS_DIRTY_H_