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include/QxSerialize/QxSerializeCheckInstance.h

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+/****************************************************************************
+**
+** 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_SERIALIZE_CHECK_INSTANCE_H_
+#define _QX_SERIALIZE_CHECK_INSTANCE_H_
+
+#ifdef _MSC_VER
+#pragma once
+#endif
+
+/*!
+ * \file QxSerializeCheckInstance.h
+ * \author XDL Team
+ * \ingroup QxSerialize
+ * \brief Check instance during serialization process to avoid infinite loop with circular references (using RAII)
+ */
+
+#include <QtCore/qset.h>
+#include <QtCore/qpair.h>
+#include <QtCore/qthread.h>
+
+namespace qx
+{
+
+   class QxSqlRelationLinked;
+   class IxClass;
+
+} // namespace qx
+
+namespace qx
+{
+   namespace serialization
+   {
+      namespace helper
+      {
+
+         /*!
+          * \ingroup QxSerialize
+          * \brief qx::serialization::helper::QxSerializeCheckInstance : check instance during serialization process to avoid infinite loop with circular references (using RAII)
+          */
+         class QX_DLL_EXPORT QxSerializeCheckInstance
+         {
+
+         public:
+            typedef QPair<std::shared_ptr<qx::QxSqlRelationLinked>, QString> type_hierarchy;
+
+         protected:
+            static QSet<QPair<Qt::HANDLE, QPair<qptrdiff, qx::IxClass *>>> m_lstInstanceByThread; //!< List of all instances currently used by a serialization process
+            static QHash<Qt::HANDLE, int> m_hashLevelByThread;                                    //!< Manage how deep level is serialization process
+            static QHash<Qt::HANDLE, type_hierarchy> m_hashHierarchyByThread;                     //!< Store current hierarchy used by serialization process
+            static QMutex m_mutex;                                                                //!< Mutex => qx::serialization::helper::QxSerializeCheckInstance is thread-safe
+
+            qptrdiff m_pInstance;   //!< Instance associated to this helper class
+            Qt::HANDLE m_lThreadId; //!< Thread id associated to this helper class
+            qx::IxClass *m_pClass;  //!< Class associated to this helper class
+
+         public:
+            QxSerializeCheckInstance(const void *pInstance, qx::IxClass *pClass);
+            virtual ~QxSerializeCheckInstance();
+
+            static bool contains(const void *pInstance, qx::IxClass *pClass);
+            static bool isRoot();
+
+            static type_hierarchy getHierarchy();
+            static void setHierarchy(const type_hierarchy &hierarchy);
+         };
+
+      } // namespace helper
+   } // namespace serialization
+} // namespace qx
+
+#endif // _QX_SERIALIZE_CHECK_INSTANCE_H_