292 lines
12 KiB
C++
292 lines
12 KiB
C++
/****************************************************************************
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**
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** https://www.qxorm.com/
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** Copyright (C) 2013 XDL Team (ic-east.com)
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**
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** This file is part of the QxOrm library
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any
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** damages arising from the use of this software
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**
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** Commercial Usage
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** Licensees holding valid commercial QxOrm licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and XDL Team
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file 'license.gpl3.txt' included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met : http://www.gnu.org/copyleft/gpl.html
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**
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** If you are unsure which license is appropriate for your use, or
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** if you have questions regarding the use of this file, please contact :
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** ic-east.com
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**
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****************************************************************************/
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namespace qx
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{
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namespace dao
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{
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namespace detail
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{
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template <class T>
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struct QxDao_FetchAll_Generic
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{
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static QSqlError fetchAll(const qx::QxSqlQuery &query, T &t, QSqlDatabase *pDatabase, const QStringList &columns)
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{
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qx::dao::detail::QxDao_Helper<T> dao(t, pDatabase, "fetch all", new qx::QxSqlQueryBuilder_FetchAll<T>(), (&query));
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if (!dao.isValid())
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{
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return dao.error();
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}
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#ifdef _QX_ENABLE_MONGODB
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if (dao.isMongoDB())
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{
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dao.setSqlColumns(columns);
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qx::dao::on_before_fetch<T>((&t), (&dao));
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if (!dao.isValid())
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{
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return dao.error();
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}
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QString json = qx::serialization::json::to_string(t, 1, "mongodb:only_id");
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qx::dao::mongodb::QxMongoDB_Helper::findOne((&dao), dao.getDataMemberX()->getClass(), json, (&query));
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if (!dao.isValid())
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{
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return dao.error();
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}
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qx::dao::detail::IxDao_Timer timer((&dao), qx::dao::detail::IxDao_Helper::timer_cpp_build_instance);
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QString ctx = QString("mongodb") + ((columns.count() > 0) ? (QString(":columns{,") + columns.join(",") + QString(",}")) : QString());
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qx::serialization::json::from_string(t, json, 1, ctx);
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qx::dao::on_after_fetch<T>((&t), (&dao));
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if (!dao.isValid())
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{
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return dao.error();
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}
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return dao.error();
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}
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#endif // _QX_ENABLE_MONGODB
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QString sql = dao.builder().buildSql(columns).getSqlQuery();
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if (sql.isEmpty())
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{
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return dao.errEmpty();
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}
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if (!query.isEmpty())
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{
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dao.addQuery(true);
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sql = dao.builder().getSqlQuery();
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}
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if (!dao.exec())
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{
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return dao.errFailed();
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}
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if (dao.nextRecord())
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{
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qx::dao::detail::IxDao_Timer timer((&dao), qx::dao::detail::IxDao_Helper::timer_cpp_build_instance);
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qx::dao::on_before_fetch<T>((&t), (&dao));
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if (!dao.isValid())
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{
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return dao.error();
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}
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qx::dao::detail::QxSqlQueryHelper_FetchAll<T>::resolveOutput(t, dao.query(), dao.builder(), columns);
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qx::dao::on_after_fetch<T>((&t), (&dao));
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if (!dao.isValid())
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{
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return dao.error();
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}
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}
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return dao.error();
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}
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};
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#ifdef _QX_ENABLE_MONGODB
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template <class T>
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struct QxDao_FetchAll_MongoDB_Fetcher : public qx::dao::mongodb::QxMongoDB_Fetcher
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{
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T &m_t;
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qx::dao::detail::QxDao_Helper_Container<T> &m_dao;
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QxDao_FetchAll_MongoDB_Fetcher(T &t, qx::dao::detail::QxDao_Helper_Container<T> &dao) : qx::dao::mongodb::QxMongoDB_Fetcher(), m_t(t), m_dao(dao) { ; }
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virtual ~QxDao_FetchAll_MongoDB_Fetcher() { ; }
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virtual void fetch(const QString &json)
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{
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typedef typename qx::trait::generic_container<T>::type_item type_item;
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typedef typename type_item::type_value_qx type_value_qx;
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type_item item = qx::trait::generic_container<T>::createItem();
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type_value_qx &item_val = item.value_qx();
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qx::IxDataMember *pId = m_dao.getDataId();
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QStringList columns = m_dao.getSqlColumns();
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if (json.isEmpty())
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{
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return;
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}
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qx::dao::detail::IxDao_Timer timer((&m_dao), qx::dao::detail::IxDao_Helper::timer_cpp_build_instance);
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qx::dao::on_before_fetch<type_value_qx>((&item_val), (&m_dao));
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if (!m_dao.isValid())
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{
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return;
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}
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QString ctx = QString("mongodb") + ((columns.count() > 0) ? (QString(":columns{,") + columns.join(",") + QString(",}")) : QString());
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qx::serialization::json::from_string(item_val, json, 1, ctx);
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for (int i = 0; i < (pId ? pId->getNameCount() : 0); i++)
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{
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QVariant id = pId->toVariant((&item_val), "", i, qx::cvt::context::e_database);
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qx::cvt::from_variant(id, item.key(), "", i, qx::cvt::context::e_database);
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}
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qx::dao::on_after_fetch<type_value_qx>((&item_val), (&m_dao));
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if (!m_dao.isValid())
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{
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return;
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}
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qx::dao::detail::QxDao_Keep_Original<type_item>::backup(item);
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qx::trait::generic_container<T>::insertItem(m_t, item);
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}
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};
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#endif // _QX_ENABLE_MONGODB
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template <class T>
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struct QxDao_FetchAll_Container
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{
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static QSqlError fetchAll(const qx::QxSqlQuery &query, T &t, QSqlDatabase *pDatabase, const QStringList &columns)
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{
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typedef typename qx::trait::generic_container<T>::type_value_qx type_item;
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qx::trait::generic_container<T>::clear(t);
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qx::dao::detail::QxDao_Helper_Container<T> dao(t, pDatabase, "fetch all", new qx::QxSqlQueryBuilder_FetchAll<type_item>(), (&query));
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if (!dao.isValid())
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{
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return dao.error();
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}
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#ifdef _QX_ENABLE_MONGODB
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if (dao.isMongoDB())
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{
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dao.setSqlColumns(columns);
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QStringList &itemsAsJson = dao.itemsAsJson();
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QxDao_FetchAll_MongoDB_Fetcher<T> fetcher(t, dao);
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qx::dao::mongodb::QxMongoDB_Helper::findMany((&dao), dao.getDataMemberX()->getClass(), itemsAsJson, (&query), (&fetcher));
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return dao.error();
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}
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#endif // _QX_ENABLE_MONGODB
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QString sql = dao.builder().buildSql(columns).getSqlQuery();
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if (sql.isEmpty())
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{
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return dao.errEmpty();
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}
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if (!query.isEmpty())
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{
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dao.addQuery(true);
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sql = dao.builder().getSqlQuery();
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}
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if (!dao.exec())
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{
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return dao.errFailed();
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}
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dao.setSqlColumns(columns);
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bool bSize = (dao.hasFeature(QSqlDriver::QuerySize) && (dao.query().size() > 0));
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if (bSize)
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{
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qx::trait::generic_container<T>::reserve(t, dao.query().size());
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}
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while (dao.nextRecord())
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{
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insertNewItem(t, dao);
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if (!dao.isValid())
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{
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return dao.error();
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}
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}
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if (bSize)
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{
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qAssert(qx::trait::generic_container<T>::size(t) == static_cast<long>(dao.query().size()));
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}
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return dao.error();
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}
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private:
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static void insertNewItem(T &t, qx::dao::detail::QxDao_Helper_Container<T> &dao)
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{
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typedef typename qx::trait::generic_container<T>::type_item type_item;
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typedef typename type_item::type_value_qx type_value_qx;
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type_item item = qx::trait::generic_container<T>::createItem();
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type_value_qx &item_val = item.value_qx();
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qx::IxDataMember *pId = dao.getDataId();
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QStringList columns = dao.getSqlColumns();
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qx::dao::detail::IxDao_Timer timer((&dao), qx::dao::detail::IxDao_Helper::timer_cpp_build_instance);
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if (pId)
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{
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for (int i = 0; i < pId->getNameCount(); i++)
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{
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QVariant v = dao.getIdFromQuery(i);
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qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database);
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}
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}
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qx::dao::on_before_fetch<type_value_qx>((&item_val), (&dao));
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if (!dao.isValid())
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{
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return;
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}
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qx::dao::detail::QxSqlQueryHelper_FetchAll<type_value_qx>::resolveOutput(item_val, dao.query(), dao.builder(), columns);
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qx::dao::on_after_fetch<type_value_qx>((&item_val), (&dao));
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if (!dao.isValid())
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{
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return;
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}
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qx::dao::detail::QxDao_Keep_Original<type_item>::backup(item);
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qx::trait::generic_container<T>::insertItem(t, item);
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}
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};
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template <class T>
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struct QxDao_FetchAll_Ptr
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{
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static inline QSqlError fetchAll(const qx::QxSqlQuery &query, T &t, QSqlDatabase *pDatabase, const QStringList &columns)
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{
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return (t ? qx::dao::fetch_by_query(query, (*t), pDatabase, columns) : QSqlError());
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}
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};
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template <class T>
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struct QxDao_FetchAll
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{
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static inline QSqlError fetchAll(const qx::QxSqlQuery &query, T &t, QSqlDatabase *pDatabase, const QStringList &columns)
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{
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typedef typename std::conditional<std::is_pointer<T>::value, qx::dao::detail::QxDao_FetchAll_Ptr<T>, qx::dao::detail::QxDao_FetchAll_Generic<T>>::type type_dao_1;
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typedef typename std::conditional<qx::trait::is_smart_ptr<T>::value, qx::dao::detail::QxDao_FetchAll_Ptr<T>, type_dao_1>::type type_dao_2;
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typedef typename std::conditional<qx::trait::is_container<T>::value, qx::dao::detail::QxDao_FetchAll_Container<T>, type_dao_2>::type type_dao_3;
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QSqlError error = type_dao_3::fetchAll(query, t, pDatabase, columns);
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if (!error.isValid())
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{
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qx::dao::detail::QxDao_Keep_Original<T>::backup(t);
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}
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return error;
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}
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};
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} // namespace detail
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} // namespace dao
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} // namespace qx
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