/****************************************************************************
**
** https://www.qxorm.com/
** Copyright (C) 2013 Lionel Marty (contact@qxorm.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 Lionel Marty
**
** 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 :
** contact@qxorm.com
**
****************************************************************************/

#include <QxPrecompiled.h>

#include <QtSql/qsqldriver.h>

#include <QxDao/QxSqlDatabase.h>

#include <QxDao/QxSqlGenerator/QxSqlGenerator.h>

#ifdef _QX_ENABLE_MONGODB
#include <QxDao/QxMongoDB/QxMongoDB_Helper.h>
#endif // _QX_ENABLE_MONGODB

#include <QxMemLeak/mem_leak.h>

#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
#define QX_CONSTRUCT_QX_SQL_DATABASE_MUTEX() m_oDbMutex()
#else // (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
#define QX_CONSTRUCT_QX_SQL_DATABASE_MUTEX() m_oDbMutex(QMutex::Recursive)
#endif // (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))

#define QX_CONSTRUCT_QX_SQL_DATABASE() \
QX_CONSTRUCT_QX_SQL_DATABASE_MUTEX(), m_iPort(-1), m_bTraceSqlQuery(true), m_bTraceSqlRecord(false), \
m_bTraceSqlBoundValues(false), m_bTraceSqlBoundValuesOnError(true), \
m_ePlaceHolderStyle(QxSqlDatabase::ph_style_2_point_name), m_bSessionThrowable(false), \
m_bSessionAutoTransaction(true), m_bValidatorThrowable(false), \
m_bAutoReplaceSqlAliasIntoQuery(true), m_bVerifyOffsetRelation(false), \
m_bAddAutoIncrementIdToUpdateQuery(true), m_bForceParentIdToAllChildren(false), \
m_bAddSqlSquareBracketsForTableName(false), m_bAddSqlSquareBracketsForColumnName(false), \
m_bFormatSqlQueryBeforeLogging(false), m_iTraceSqlOnlySlowQueriesDatabase(-1), m_iTraceSqlOnlySlowQueriesTotal(-1), \
m_bDisplayTimerDetails(false)

QX_DLL_EXPORT_QX_SINGLETON_CPP(qx::QxSqlDatabase)

namespace qx {

struct Q_DECL_HIDDEN QxSqlDatabase::QxSqlDatabaseImpl
{

   QxSqlDatabase * m_pParent;                               //!< Parent instance of the private implementation idiom
   QHash<Qt::HANDLE, QString> m_lstDbByThread;              //!< Collection of databases connexions by thread id
#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
   QRecursiveMutex m_oDbMutex;                              //!< Mutex => 'QxSqlDatabase' is thread-safe
#else // (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
   QMutex m_oDbMutex;                                       //!< Mutex => 'QxSqlDatabase' is thread-safe
#endif // (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
   QString m_sDriverName;                                   //!< Driver name to connect to database
   QString m_sConnectOptions;                               //!< Connect options to database
   QString m_sDatabaseName;                                 //!< Database name
   QString m_sUserName;                                     //!< Connection's user name
   QString m_sPassword;                                     //!< Connection's password
   QString m_sHostName;                                     //!< Connection's host name
   int m_iPort;                                             //!< Connection's port number
   bool m_bTraceSqlQuery;                                   //!< Trace each sql query executed
   bool m_bTraceSqlRecord;                                  //!< Trace each sql record
   bool m_bTraceSqlBoundValues;                             //!< Trace sql bound values
   bool m_bTraceSqlBoundValuesOnError;                      //!< Trace sql bound values (only when an error occurred)
   QxSqlDatabase::ph_style m_ePlaceHolderStyle;             //!< Place holder style to build sql query
   bool m_bSessionThrowable;                                //!< An exception of type qx::dao::sql_error is thrown when a SQL error is appended to qx::QxSession object
   bool m_bSessionAutoTransaction;                          //!< A transaction is automatically beginned when a qx::QxSession object is instantiated
   bool m_bValidatorThrowable;                              //!< An exception of type qx::validator_error is thrown when invalid values are detected inserting or updating an element into database
   qx::dao::detail::IxSqlGenerator_ptr m_pSqlGenerator;     //!< SQL generator to build SQL query specific for each database
   bool m_bAutoReplaceSqlAliasIntoQuery;                    //!< Replace all sql alias into sql query automatically
   bool m_bVerifyOffsetRelation;                            //!< Only for debug purpose : assert if invalid offset detected fetching a relation
   bool m_bAddAutoIncrementIdToUpdateQuery;                 //!< For Microsoft SqlServer database compatibility : add or not auto-increment id to SQL update query
   bool m_bForceParentIdToAllChildren;                      //!< Force parent id to all children (for 1-n relationship for example)
   QxSqlDatabase::type_fct_db_open m_fctDatabaseOpen;       //!< Callback function called when a new database connection is opened (can be used for example with SQLite database to define some PRAGMAs before executing any SQL query)
   bool m_bAddSqlSquareBracketsForTableName;                //!< Add square brackets [] for table name in SQL queries (to support specific database keywords)
   bool m_bAddSqlSquareBracketsForColumnName;               //!< Add square brackets [] for column name in SQL queries (to support specific database keywords)
   bool m_bFormatSqlQueryBeforeLogging;                     //!< Format SQL query (pretty-printing) before logging it (can be customized creating a qx::dao::detail::IxSqlGenerator sub-class)
   QStringList m_lstSqlDelimiterForTableName;               //!< Add delimiter characters for table name in SQL queries (to support specific database keywords) : for example, use ` for MySQL database
   QStringList m_lstSqlDelimiterForColumnName;              //!< Add delimiter characters for column name in SQL queries (to support specific database keywords) : for example, use ` for MySQL database
   QStringList m_lstSqlDelimiterForTableNameAlias;          //!< Add delimiter characters for table name alias in SQL queries (to support specific database keywords) : for example, use ` for MySQL database
   QStringList m_lstSqlDelimiterForColumnNameAlias;         //!< Add delimiter characters for column name alias in SQL queries (to support specific database keywords) : for example, use ` for MySQL database
   int m_iTraceSqlOnlySlowQueriesDatabase;                  //!< Trace only slow sql queries (database execution time only, in milliseconds)
   int m_iTraceSqlOnlySlowQueriesTotal;                     //!< Trace only slow sql queries (database execution time + C++ qx::dao execution time, in milliseconds)
   bool m_bDisplayTimerDetails;                             //!< Display in logs all timers details (exec(), next(), prepare(), open(), etc...)

   QHash<QPair<Qt::HANDLE, QString>, QVariant> m_lstSettingsByThread;               //!< List of settings per thread (override global settings) : can be useful to use different databases per thread (see bJustForCurrentThread parameter in all setXXXX() methods)
   QHash<Qt::HANDLE, qx::dao::detail::IxSqlGenerator_ptr> m_lstGeneratorByThread;   //!< List of SQL generator per thread (override global settings) : can be useful to use different databases per thread (see bJustForCurrentThread parameter in setSqlGenerator() method)
   QHash<QPair<QString, QString>, QVariant> m_lstSettingsByDatabase;                //!< List of settings per database (override global settings and thread settings) : can be useful to use different databases in a same thread (see pJustForThisDatabase parameter in all setXXXX() method)
   QHash<QString, qx::dao::detail::IxSqlGenerator_ptr> m_lstGeneratorByDatabase;    //!< List of SQL generator per database (override global settings and thread settings) : can be useful to use different databases in a same thread (see pJustForThisDatabase parameter in setSqlGenerator() method)
   QHash<Qt::HANDLE, QString> m_lstCurrDatabaseKeyByThread;                         //!< Current database key (key = driverName + hostName + databaseName + connectionName) used per thread : this list is filled by each qx::dao::detail::IxDao_Helper instance using RAII

   QxSqlDatabaseImpl(QxSqlDatabase * p) : m_pParent(p), QX_CONSTRUCT_QX_SQL_DATABASE() { ; }
   ~QxSqlDatabaseImpl() { ; }

   QSqlDatabase getDatabaseByCurrThreadId(QSqlError & dbError);
   QSqlDatabase createDatabase(QSqlError & dbError);

   void displayLastError(const QSqlDatabase & db, const QString & sDesc) const;
   QString formatLastError(const QSqlDatabase & db) const;

   bool isValid() const { return (m_pParent ? (! m_pParent->getDriverName().isEmpty() && ! m_pParent->getDatabaseName().isEmpty()) : (! m_sDriverName.isEmpty() && ! m_sDatabaseName.isEmpty())); }
   QString computeDatabaseKey(QSqlDatabase * p) const { return (p ? (p->driverName() + p->hostName() + p->databaseName()) : (m_sDriverName + m_sHostName + m_sDatabaseName)); }

   QVariant getSetting(const QString & key) const
   {
      if (m_lstSettingsByDatabase.count() > 0)
      {
         Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
         QString sDatabaseKey = (m_lstCurrDatabaseKeyByThread.contains(lCurrThreadId) ? m_lstCurrDatabaseKeyByThread.value(lCurrThreadId) : QString());
         QPair<QString, QString> pairDatabase = qMakePair(sDatabaseKey, key);
         if (m_lstSettingsByDatabase.contains(pairDatabase)) { return m_lstSettingsByDatabase.value(pairDatabase); }
      }
      if (m_lstSettingsByThread.count() > 0)
      {
         Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
         QPair<Qt::HANDLE, QString> pairThread = qMakePair(lCurrThreadId, key);
         if (m_lstSettingsByThread.contains(pairThread)) { return m_lstSettingsByThread.value(pairThread); }
      }
      return QVariant();
   }

   bool setSetting(const QString & key, const QVariant & val, bool bJustForCurrentThread, QSqlDatabase * pJustForThisDatabase)
   {
      bool bUpdateGlobal = true;
      if (bJustForCurrentThread)
      {
         QMutexLocker locker(& m_oDbMutex);
         Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
         QPair<Qt::HANDLE, QString> pairThread = qMakePair(lCurrThreadId, key);
         m_lstSettingsByThread.insert(pairThread, val);
         bUpdateGlobal = false;
      }
      if (pJustForThisDatabase != NULL)
      {
         QMutexLocker locker(& m_oDbMutex);
         QString sDatabaseKey = computeDatabaseKey(pJustForThisDatabase);
         if (sDatabaseKey.isEmpty()) { qDebug("[QxOrm] qx::QxSqlDatabase::setSetting() : database parameters are empty ==> cannot add setting database '%s'", qPrintable(key)); qAssert(false); return false; }
         QPair<QString, QString> pairDatabase = qMakePair(sDatabaseKey, key);
         m_lstSettingsByDatabase.insert(pairDatabase, val);
         bUpdateGlobal = false;
      }
      return bUpdateGlobal;
   }

};

QxSqlDatabase::QxSqlDatabase() : QxSingleton<QxSqlDatabase>("qx::QxSqlDatabase"), m_pImpl(new QxSqlDatabaseImpl(this)) { ; }

QxSqlDatabase::~QxSqlDatabase() { ; }

QString QxSqlDatabase::getDriverName() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_sDriverName; }
   QVariant setting = m_pImpl->getSetting("DriverName");
   if (! setting.isNull()) { return setting.toString(); }
   return m_pImpl->m_sDriverName;
}

QString QxSqlDatabase::getConnectOptions() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_sConnectOptions; }
   QVariant setting = m_pImpl->getSetting("ConnectOptions");
   if (! setting.isNull()) { return setting.toString(); }
   return m_pImpl->m_sConnectOptions;
}

QString QxSqlDatabase::getDatabaseName() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_sDatabaseName; }
   QVariant setting = m_pImpl->getSetting("DatabaseName");
   if (! setting.isNull()) { return setting.toString(); }
   return m_pImpl->m_sDatabaseName;
}

QString QxSqlDatabase::getUserName() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_sUserName; }
   QVariant setting = m_pImpl->getSetting("UserName");
   if (! setting.isNull()) { return setting.toString(); }
   return m_pImpl->m_sUserName;
}

QString QxSqlDatabase::getPassword() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_sPassword; }
   QVariant setting = m_pImpl->getSetting("Password");
   if (! setting.isNull()) { return setting.toString(); }
   return m_pImpl->m_sPassword;
}

QString QxSqlDatabase::getHostName() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_sHostName; }
   QVariant setting = m_pImpl->getSetting("HostName");
   if (! setting.isNull()) { return setting.toString(); }
   return m_pImpl->m_sHostName;
}

int QxSqlDatabase::getPort() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_iPort; }
   QVariant setting = m_pImpl->getSetting("Port");
   if (! setting.isNull()) { return setting.toInt(); }
   return m_pImpl->m_iPort;
}

bool QxSqlDatabase::getTraceSqlQuery() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bTraceSqlQuery; }
   QVariant setting = m_pImpl->getSetting("TraceSqlQuery");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bTraceSqlQuery;
}

bool QxSqlDatabase::getTraceSqlRecord() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bTraceSqlRecord; }
   QVariant setting = m_pImpl->getSetting("TraceSqlRecord");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bTraceSqlRecord;
}

bool QxSqlDatabase::getTraceSqlBoundValues() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bTraceSqlBoundValues; }
   QVariant setting = m_pImpl->getSetting("TraceSqlBoundValues");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bTraceSqlBoundValues;
}

bool QxSqlDatabase::getTraceSqlBoundValuesOnError() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bTraceSqlBoundValuesOnError; }
   QVariant setting = m_pImpl->getSetting("TraceSqlBoundValuesOnError");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bTraceSqlBoundValuesOnError;
}

QxSqlDatabase::ph_style QxSqlDatabase::getSqlPlaceHolderStyle() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_ePlaceHolderStyle; }
   QVariant setting = m_pImpl->getSetting("SqlPlaceHolderStyle");
   if (! setting.isNull()) { return static_cast<QxSqlDatabase::ph_style>(setting.toInt()); }
   return m_pImpl->m_ePlaceHolderStyle;
}

bool QxSqlDatabase::getSessionThrowable() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bSessionThrowable; }
   QVariant setting = m_pImpl->getSetting("SessionThrowable");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bSessionThrowable;
}

bool QxSqlDatabase::getSessionAutoTransaction() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bSessionAutoTransaction; }
   QVariant setting = m_pImpl->getSetting("SessionAutoTransaction");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bSessionAutoTransaction;
}

bool QxSqlDatabase::getValidatorThrowable() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bValidatorThrowable; }
   QVariant setting = m_pImpl->getSetting("ValidatorThrowable");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bValidatorThrowable;
}

bool QxSqlDatabase::getAutoReplaceSqlAliasIntoQuery() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bAutoReplaceSqlAliasIntoQuery; }
   QVariant setting = m_pImpl->getSetting("AutoReplaceSqlAliasIntoQuery");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bAutoReplaceSqlAliasIntoQuery;
}

bool QxSqlDatabase::getVerifyOffsetRelation() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bVerifyOffsetRelation; }
   QVariant setting = m_pImpl->getSetting("VerifyOffsetRelation");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bVerifyOffsetRelation;
}

bool QxSqlDatabase::getAddAutoIncrementIdToUpdateQuery() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bAddAutoIncrementIdToUpdateQuery; }
   QVariant setting = m_pImpl->getSetting("AddAutoIncrementIdToUpdateQuery");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bAddAutoIncrementIdToUpdateQuery;
}

bool QxSqlDatabase::getForceParentIdToAllChildren() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bForceParentIdToAllChildren; }
   QVariant setting = m_pImpl->getSetting("ForceParentIdToAllChildren");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bForceParentIdToAllChildren;
}

QxSqlDatabase::type_fct_db_open QxSqlDatabase::getFctDatabaseOpen() const
{
   return m_pImpl->m_fctDatabaseOpen;
}

bool QxSqlDatabase::getAddSqlSquareBracketsForTableName() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bAddSqlSquareBracketsForTableName; }
   QVariant setting = m_pImpl->getSetting("AddSqlSquareBracketsForTableName");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bAddSqlSquareBracketsForTableName;
}

bool QxSqlDatabase::getAddSqlSquareBracketsForColumnName() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bAddSqlSquareBracketsForColumnName; }
   QVariant setting = m_pImpl->getSetting("AddSqlSquareBracketsForColumnName");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bAddSqlSquareBracketsForColumnName;
}

bool QxSqlDatabase::getFormatSqlQueryBeforeLogging() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bFormatSqlQueryBeforeLogging; }
   QVariant setting = m_pImpl->getSetting("FormatSqlQueryBeforeLogging");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bFormatSqlQueryBeforeLogging;
}

QStringList QxSqlDatabase::getSqlDelimiterForTableName() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_lstSqlDelimiterForTableName; }
   QVariant setting = m_pImpl->getSetting("SqlDelimiterForTableName");
   if (! setting.isNull()) { return setting.toStringList(); }
   return m_pImpl->m_lstSqlDelimiterForTableName;
}

QStringList QxSqlDatabase::getSqlDelimiterForColumnName() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_lstSqlDelimiterForColumnName; }
   QVariant setting = m_pImpl->getSetting("SqlDelimiterForColumnName");
   if (! setting.isNull()) { return setting.toStringList(); }
   return m_pImpl->m_lstSqlDelimiterForColumnName;
}

QStringList QxSqlDatabase::getSqlDelimiterForTableNameAlias() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_lstSqlDelimiterForTableNameAlias; }
   QVariant setting = m_pImpl->getSetting("SqlDelimiterForTableNameAlias");
   if (! setting.isNull()) { return setting.toStringList(); }
   return m_pImpl->m_lstSqlDelimiterForTableNameAlias;
}

QStringList QxSqlDatabase::getSqlDelimiterForColumnNameAlias() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_lstSqlDelimiterForColumnNameAlias; }
   QVariant setting = m_pImpl->getSetting("SqlDelimiterForColumnNameAlias");
   if (! setting.isNull()) { return setting.toStringList(); }
   return m_pImpl->m_lstSqlDelimiterForColumnNameAlias;
}

int QxSqlDatabase::getTraceSqlOnlySlowQueriesDatabase() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_iTraceSqlOnlySlowQueriesDatabase; }
   QVariant setting = m_pImpl->getSetting("TraceSqlOnlySlowQueriesDatabase");
   if (! setting.isNull()) { return setting.toInt(); }
   return m_pImpl->m_iTraceSqlOnlySlowQueriesDatabase;
}

int QxSqlDatabase::getTraceSqlOnlySlowQueriesTotal() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_iTraceSqlOnlySlowQueriesTotal; }
   QVariant setting = m_pImpl->getSetting("TraceSqlOnlySlowQueriesTotal");
   if (! setting.isNull()) { return setting.toInt(); }
   return m_pImpl->m_iTraceSqlOnlySlowQueriesTotal;
}

bool QxSqlDatabase::getDisplayTimerDetails() const
{
   if ((m_pImpl->m_lstSettingsByThread.count() <= 0) && (m_pImpl->m_lstSettingsByDatabase.count() <= 0)) { return m_pImpl->m_bDisplayTimerDetails; }
   QVariant setting = m_pImpl->getSetting("DisplayTimerDetails");
   if (! setting.isNull()) { return setting.toBool(); }
   return m_pImpl->m_bDisplayTimerDetails;
}

void QxSqlDatabase::setDriverName(const QString & s, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("DriverName", s, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_sDriverName = s; }
   getSqlGenerator();
}

void QxSqlDatabase::setConnectOptions(const QString & s, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("ConnectOptions", s, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_sConnectOptions = s; }
}

void QxSqlDatabase::setDatabaseName(const QString & s, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("DatabaseName", s, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_sDatabaseName = s; }
}

void QxSqlDatabase::setUserName(const QString & s, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("UserName", s, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_sUserName = s; }
}

void QxSqlDatabase::setPassword(const QString & s, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("Password", s, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_sPassword = s; }
}

void QxSqlDatabase::setHostName(const QString & s, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("HostName", s, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_sHostName = s; }
}

void QxSqlDatabase::setPort(int i, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("Port", i, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_iPort = i; }
}

void QxSqlDatabase::setTraceSqlQuery(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("TraceSqlQuery", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bTraceSqlQuery = b; }
}

void QxSqlDatabase::setTraceSqlRecord(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("TraceSqlRecord", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bTraceSqlRecord = b; }
}

void QxSqlDatabase::setTraceSqlBoundValues(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("TraceSqlBoundValues", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bTraceSqlBoundValues = b; }
}

void QxSqlDatabase::setTraceSqlBoundValuesOnError(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("TraceSqlBoundValuesOnError", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bTraceSqlBoundValuesOnError = b; }
}

void QxSqlDatabase::setSqlPlaceHolderStyle(QxSqlDatabase::ph_style e, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   int i = static_cast<int>(e);
   bool bUpdateGlobal = m_pImpl->setSetting("SqlPlaceHolderStyle", i, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_ePlaceHolderStyle = e; }
}

void QxSqlDatabase::setSessionThrowable(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("SessionThrowable", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bSessionThrowable = b; }
}

void QxSqlDatabase::setSessionAutoTransaction(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("SessionAutoTransaction", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bSessionAutoTransaction = b; }
}

void QxSqlDatabase::setValidatorThrowable(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("ValidatorThrowable", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bValidatorThrowable = b; }
}

void QxSqlDatabase::setSqlGenerator(qx::dao::detail::IxSqlGenerator_ptr p, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = true;
   if (p && bJustForCurrentThread)
   {
      QMutexLocker locker(& m_pImpl->m_oDbMutex);
      Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
      m_pImpl->m_lstGeneratorByThread.insert(lCurrThreadId, p);
      bUpdateGlobal = false;
   }
   if (p && (pJustForThisDatabase != NULL))
   {
      QMutexLocker locker(& m_pImpl->m_oDbMutex);
      QString sDatabaseKey = m_pImpl->computeDatabaseKey(pJustForThisDatabase);
      if (sDatabaseKey.isEmpty()) { qDebug("[QxOrm] qx::QxSqlDatabase::setSqlGenerator() : database parameters are empty ==> cannot add setting database '%s'", "SqlGenerator"); qAssert(false); return; }
      m_pImpl->m_lstGeneratorByDatabase.insert(sDatabaseKey, p);
      bUpdateGlobal = false;
   }

   if (bUpdateGlobal) { m_pImpl->m_pSqlGenerator = p; }
   if (p) { p->init(); }
}

void QxSqlDatabase::setAutoReplaceSqlAliasIntoQuery(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("AutoReplaceSqlAliasIntoQuery", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bAutoReplaceSqlAliasIntoQuery = b; }
}

void QxSqlDatabase::setVerifyOffsetRelation(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("VerifyOffsetRelation", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bVerifyOffsetRelation = b; }
}

void QxSqlDatabase::setAddAutoIncrementIdToUpdateQuery(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("AddAutoIncrementIdToUpdateQuery", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bAddAutoIncrementIdToUpdateQuery = b; }
}

void QxSqlDatabase::setForceParentIdToAllChildren(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("ForceParentIdToAllChildren", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bForceParentIdToAllChildren = b; }
}

void QxSqlDatabase::setFctDatabaseOpen(QxSqlDatabase::type_fct_db_open fct, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   Q_UNUSED(bJustForCurrentThread); Q_UNUSED(pJustForThisDatabase);
   m_pImpl->m_fctDatabaseOpen = fct;
}

void QxSqlDatabase::setAddSqlSquareBracketsForTableName(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("AddSqlSquareBracketsForTableName", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bAddSqlSquareBracketsForTableName = b; }
}

void QxSqlDatabase::setAddSqlSquareBracketsForColumnName(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("AddSqlSquareBracketsForColumnName", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bAddSqlSquareBracketsForColumnName = b; }
}

void QxSqlDatabase::setFormatSqlQueryBeforeLogging(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("FormatSqlQueryBeforeLogging", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bFormatSqlQueryBeforeLogging = b; }
}

void QxSqlDatabase::setSqlDelimiterForTableName(const QStringList & lst, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("SqlDelimiterForTableName", lst, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_lstSqlDelimiterForTableName = lst; }
}

void QxSqlDatabase::setSqlDelimiterForColumnName(const QStringList & lst, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("SqlDelimiterForColumnName", lst, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_lstSqlDelimiterForColumnName = lst; }
}

void QxSqlDatabase::setSqlDelimiterForTableNameAlias(const QStringList & lst, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("SqlDelimiterForTableNameAlias", lst, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_lstSqlDelimiterForTableNameAlias = lst; }
}

void QxSqlDatabase::setSqlDelimiterForColumnNameAlias(const QStringList & lst, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("SqlDelimiterForColumnNameAlias", lst, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_lstSqlDelimiterForColumnNameAlias = lst; }
}

void QxSqlDatabase::setTraceSqlOnlySlowQueriesDatabase(int i, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("TraceSqlOnlySlowQueriesDatabase", i, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_iTraceSqlOnlySlowQueriesDatabase = i; }
}

void QxSqlDatabase::setTraceSqlOnlySlowQueriesTotal(int i, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("TraceSqlOnlySlowQueriesTotal", i, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_iTraceSqlOnlySlowQueriesTotal = i; }
}

void QxSqlDatabase::setDisplayTimerDetails(bool b, bool bJustForCurrentThread /* = false */, QSqlDatabase * pJustForThisDatabase /* = NULL */)
{
   bool bUpdateGlobal = m_pImpl->setSetting("DisplayTimerDetails", b, bJustForCurrentThread, pJustForThisDatabase);
   if (bUpdateGlobal) { m_pImpl->m_bDisplayTimerDetails = b; }
}

QSqlDatabase QxSqlDatabase::getDatabase(QSqlError & dbError) { return QxSqlDatabase::getSingleton()->m_pImpl->getDatabaseByCurrThreadId(dbError); }

QSqlDatabase QxSqlDatabase::getDatabase()
{
   QSqlError dbError; Q_UNUSED(dbError);
   return QxSqlDatabase::getDatabase(dbError);
}

QSqlDatabase QxSqlDatabase::getDatabaseCloned()
{
   QSqlError dbError; Q_UNUSED(dbError);
   QString sKeyClone = QUuid::createUuid().toString();
   return QSqlDatabase::cloneDatabase(QxSqlDatabase::getDatabase(dbError), sKeyClone);
}

QSqlDatabase QxSqlDatabase::checkDatabaseByThread()
{
   QxSqlDatabase::QxSqlDatabaseImpl * pImpl = QxSqlDatabase::getSingleton()->m_pImpl.get();
   QMutexLocker locker(& pImpl->m_oDbMutex);
   Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
   if (! pImpl->m_lstDbByThread.contains(lCurrThreadId)) { return QSqlDatabase(); }
   QString sDbKey = pImpl->m_lstDbByThread.value(lCurrThreadId);
   if (! QSqlDatabase::contains(sDbKey)) { return QSqlDatabase(); }
   return QSqlDatabase::database(sDbKey);
}

void QxSqlDatabase::removeDatabaseByThread()
{
   QxSqlDatabase::QxSqlDatabaseImpl * pImpl = QxSqlDatabase::getSingleton()->m_pImpl.get();
   QMutexLocker locker(& pImpl->m_oDbMutex);
   Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
   if (! pImpl->m_lstDbByThread.contains(lCurrThreadId)) { return; }
   QString sDbKey = pImpl->m_lstDbByThread.value(lCurrThreadId);
   if (! QSqlDatabase::contains(sDbKey)) { return; }
   QSqlDatabase::database(sDbKey).close();
   QSqlDatabase::removeDatabase(sDbKey);
   pImpl->m_lstDbByThread.remove(lCurrThreadId);
}

QSqlDatabase QxSqlDatabase::QxSqlDatabaseImpl::getDatabaseByCurrThreadId(QSqlError & dbError)
{
   QMutexLocker locker(& m_oDbMutex);
   dbError = QSqlError();

   if (! isValid())
   {
      qDebug("[QxOrm] qx::QxSqlDatabase : '%s'", "parameters are not valid");
      dbError = QSqlError("[QxOrm] qx::QxSqlDatabase : 'parameters are not valid'", "", QSqlError::UnknownError);
      qAssert(false); return QSqlDatabase();
   }

   Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
   if (! lCurrThreadId)
   {
      qDebug("[QxOrm] qx::QxSqlDatabase : '%s'", "unable to find current thread id");
      dbError = QSqlError("[QxOrm] qx::QxSqlDatabase : 'unable to find current thread id'", "", QSqlError::UnknownError);
      qAssert(false); return QSqlDatabase();
   }

   if (! m_lstDbByThread.contains(lCurrThreadId)) { return createDatabase(dbError); }
   QString sDbKey = m_lstDbByThread.value(lCurrThreadId);
   if (! QSqlDatabase::contains(sDbKey)) { return createDatabase(dbError); }
   QSqlDatabase db = QSqlDatabase::database(sDbKey);
   if (! db.isValid()) { return createDatabase(dbError); }
   if (db.driver() && (db.driver()->thread() != QThread::currentThread())) { return createDatabase(dbError); }
   return db;
}

namespace helper {

template <typename T, bool bIsPointer>
struct CvtQtHandle
{ static QString toString(T t) { return QString::number(static_cast<qlonglong>(t)); } };

template <typename T>
struct CvtQtHandle<T, true>
{
   static QString toString(T t)
   {
      const void * ptr = static_cast<const void *>(t);
      QString value; QTextStream stream(& value);
      stream << ptr;
      return value;
   }
};

} // namespace helper

QSqlDatabase QxSqlDatabase::QxSqlDatabaseImpl::createDatabase(QSqlError & dbError)
{
   Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
   QString sCurrThreadId = qx::helper::CvtQtHandle<Qt::HANDLE, std::is_pointer<Qt::HANDLE>::value>::toString(lCurrThreadId);
   QString sDbKeyNew = QUuid::createUuid().toString();
   dbError = QSqlError();
   bool bError = false;

   {
      QSqlDatabase db = QSqlDatabase::addDatabase(m_pParent->getDriverName(), sDbKeyNew);
      db.setConnectOptions(m_pParent->getConnectOptions());
      db.setDatabaseName(m_pParent->getDatabaseName());
      db.setUserName(m_pParent->getUserName());
      db.setPassword(m_pParent->getPassword());
      db.setHostName(m_pParent->getHostName());
      if (m_pParent->getPort() != -1) { db.setPort(m_pParent->getPort()); }
      if (! db.open()) { displayLastError(db, "unable to open connection to database"); bError = true; }
      if (bError) { dbError = db.lastError(); }
      if (bError && ! dbError.isValid())
      { dbError = QSqlError("[QxOrm] qx::QxSqlDatabase : 'unable to open connection to database'", "", QSqlError::UnknownError); }
   }

   if (bError) { QSqlDatabase::removeDatabase(sDbKeyNew); return QSqlDatabase(); }
   m_lstDbByThread.insert(lCurrThreadId, sDbKeyNew);
   qDebug("[QxOrm] qx::QxSqlDatabase : create new database connection in thread '%s' with key '%s'", qPrintable(sCurrThreadId), qPrintable(sDbKeyNew));
   QSqlDatabase dbconn = QSqlDatabase::database(sDbKeyNew);
   if (m_fctDatabaseOpen) { m_fctDatabaseOpen(dbconn); }
   return dbconn;
}

void QxSqlDatabase::QxSqlDatabaseImpl::displayLastError(const QSqlDatabase & db, const QString & sDesc) const
{
   QString sLastError = formatLastError(db);
   if (sDesc.isEmpty()) { qDebug("[QxOrm] qx::QxSqlDatabase : '%s'", qPrintable(sLastError)); }
   else { qDebug("[QxOrm] qx::QxSqlDatabase : '%s'\n%s", qPrintable(sDesc), qPrintable(sLastError)); }
}

QString QxSqlDatabase::QxSqlDatabaseImpl::formatLastError(const QSqlDatabase & db) const
{
   QString sLastError;
#if (QT_VERSION >= QT_VERSION_CHECK(5, 3, 0))
   if (! db.lastError().nativeErrorCode().isEmpty()) { sLastError += QString("Error number '") + db.lastError().nativeErrorCode() + QString("' : "); }
#else // (QT_VERSION >= QT_VERSION_CHECK(5, 3, 0))
   if (db.lastError().number() != -1) { sLastError += QString("Error number '") + QString::number(db.lastError().number()) + QString("' : "); }
#endif // (QT_VERSION >= QT_VERSION_CHECK(5, 3, 0))
   if (! db.lastError().text().isEmpty()) { sLastError += db.lastError().text(); }
   else { sLastError += "<no error description>"; }
   return sLastError;
}

qx::dao::detail::IxSqlGenerator * QxSqlDatabase::getSqlGenerator()
{
   if (m_pImpl->m_lstGeneratorByDatabase.count() > 0)
   {
      Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
      QString sDatabaseKey = (m_pImpl->m_lstCurrDatabaseKeyByThread.contains(lCurrThreadId) ? m_pImpl->m_lstCurrDatabaseKeyByThread.value(lCurrThreadId) : QString());
      if (m_pImpl->m_lstGeneratorByDatabase.contains(sDatabaseKey)) { return m_pImpl->m_lstGeneratorByDatabase.value(sDatabaseKey).get(); }
   }
   if (m_pImpl->m_lstGeneratorByThread.count() > 0)
   {
      Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
      if (m_pImpl->m_lstGeneratorByThread.contains(lCurrThreadId)) { return m_pImpl->m_lstGeneratorByThread.value(lCurrThreadId).get(); }
   }

   if (m_pImpl->m_pSqlGenerator) { return m_pImpl->m_pSqlGenerator.get(); }
   QMutexLocker locker(& m_pImpl->m_oDbMutex);

   if (m_pImpl->m_sDriverName == "QMYSQL")         { m_pImpl->m_pSqlGenerator = std::make_shared<qx::dao::detail::QxSqlGenerator_MySQL>(); }
   else if (m_pImpl->m_sDriverName == "QPSQL")     { m_pImpl->m_pSqlGenerator = std::make_shared<qx::dao::detail::QxSqlGenerator_PostgreSQL>(); }
   else if (m_pImpl->m_sDriverName == "QSQLITE")   { m_pImpl->m_pSqlGenerator = std::make_shared<qx::dao::detail::QxSqlGenerator_SQLite>(); }
   else if (m_pImpl->m_sDriverName == "QOCI")      { m_pImpl->m_pSqlGenerator = std::make_shared<qx::dao::detail::QxSqlGenerator_Oracle>(); }

   if (! m_pImpl->m_pSqlGenerator) { m_pImpl->m_pSqlGenerator = std::make_shared<qx::dao::detail::QxSqlGenerator_Standard>(); }
   m_pImpl->m_pSqlGenerator->init();
   return m_pImpl->m_pSqlGenerator.get();
}

void QxSqlDatabase::closeAllDatabases()
{
   qx::QxSqlDatabase * pSingleton = qx::QxSqlDatabase::getSingleton();
   if (! pSingleton) { qAssert(false); return; }
   QMutexLocker locker(& pSingleton->m_pImpl->m_oDbMutex);

   Q_FOREACH(QString sDbKey, pSingleton->m_pImpl->m_lstDbByThread)
   {
      QSqlDatabase::database(sDbKey).close();
      QSqlDatabase::removeDatabase(sDbKey);
   }
   pSingleton->m_pImpl->m_lstDbByThread.clear();

#ifdef _QX_ENABLE_MONGODB
   qx::dao::mongodb::QxMongoDB_Helper::clearPoolConnection();
#endif // _QX_ENABLE_MONGODB
}

void QxSqlDatabase::clearAllDatabases()
{
   qx::QxSqlDatabase * pSingleton = qx::QxSqlDatabase::getSingleton();
   if (! pSingleton) { qAssert(false); return; }
   QMutexLocker locker(& pSingleton->m_pImpl->m_oDbMutex);

   qx::QxSqlDatabase::closeAllDatabases();
   pSingleton->m_pImpl->m_sDriverName = "";
   pSingleton->m_pImpl->m_sConnectOptions = "";
   pSingleton->m_pImpl->m_sDatabaseName = "";
   pSingleton->m_pImpl->m_sUserName = "";
   pSingleton->m_pImpl->m_sPassword = "";
   pSingleton->m_pImpl->m_sHostName = "";
   pSingleton->m_pImpl->m_iPort = -1;
}

bool QxSqlDatabase::isEmpty()
{
   qx::QxSqlDatabase * pSingleton = qx::QxSqlDatabase::getSingleton();
   if (! pSingleton) { qAssert(false); return true; }
   QMutexLocker locker(& pSingleton->m_pImpl->m_oDbMutex);
   return pSingleton->m_pImpl->m_lstDbByThread.isEmpty();
}

bool QxSqlDatabase::setCurrentDatabaseByThread(QSqlDatabase * p)
{
   if (! p) { return false; }
   QString sDatabaseKey = m_pImpl->computeDatabaseKey(p);
   QString sCurrDatabaseKey = m_pImpl->computeDatabaseKey(NULL);
   if (sDatabaseKey.toUpper() == sCurrDatabaseKey.toUpper()) { return false; }

   QMutexLocker locker(& m_pImpl->m_oDbMutex);
   Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
   if (! sDatabaseKey.isEmpty() && ! m_pImpl->m_lstCurrDatabaseKeyByThread.contains(lCurrThreadId))
   { m_pImpl->m_lstCurrDatabaseKeyByThread.insert(lCurrThreadId, sDatabaseKey); return true; }
   return false;
}

void QxSqlDatabase::clearCurrentDatabaseByThread()
{
   if (m_pImpl->m_lstCurrDatabaseKeyByThread.count() <= 0) { return; }
   QMutexLocker locker(& m_pImpl->m_oDbMutex);
   Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
   m_pImpl->m_lstCurrDatabaseKeyByThread.remove(lCurrThreadId);
}

void QxSqlDatabase::clearAllSettingsForCurrentThread()
{
   QMutexLocker locker(& m_pImpl->m_oDbMutex);
   Qt::HANDLE lCurrThreadId = QThread::currentThreadId();
   QMutableHashIterator<QPair<Qt::HANDLE, QString>, QVariant> itr(m_pImpl->m_lstSettingsByThread);
   while (itr.hasNext()) { itr.next(); if (itr.key().first == lCurrThreadId) { itr.remove(); } }
   QMutableHashIterator<Qt::HANDLE, qx::dao::detail::IxSqlGenerator_ptr> itr2(m_pImpl->m_lstGeneratorByThread);
   while (itr2.hasNext()) { itr2.next(); if (itr2.key() == lCurrThreadId) { itr2.remove(); } }
}

void QxSqlDatabase::clearAllSettingsForDatabase(QSqlDatabase * p)
{
   if (! p) { return; }
   QMutexLocker locker(& m_pImpl->m_oDbMutex);
   QString sDatabaseKey = m_pImpl->computeDatabaseKey(p);
   QMutableHashIterator<QPair<QString, QString>, QVariant> itr(m_pImpl->m_lstSettingsByDatabase);
   while (itr.hasNext()) { itr.next(); if (itr.key().first == sDatabaseKey) { itr.remove(); } }
   QMutableHashIterator<QString, qx::dao::detail::IxSqlGenerator_ptr> itr2(m_pImpl->m_lstGeneratorByDatabase);
   while (itr2.hasNext()) { itr2.next(); if (itr2.key() == sDatabaseKey) { itr2.remove(); } }
}

} // namespace qx
