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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_SQL_RELATION_H_
#define _QX_SQL_RELATION_H_
#ifdef _MSC_VER
#pragma once
#endif
/*!
* \file QxSqlRelation.h
* \author XDL Team
* \ingroup QxDao
* \brief Base class for all relationships defined between 2 classes (or between 2 tables in database)
*/
#include <QxDao/QxDao.h>
#include <QxDao/IxSqlRelation.h>
#include <QxDao/IxSqlQueryBuilder.h>
#include <QxTraits/remove_attr.h>
#include <QxTraits/remove_smart_ptr.h>
#include <QxTraits/generic_container.h>
#include <QxTraits/is_container.h>
#include <QxTraits/is_valid_primary_key.h>
#include <QxTraits/is_qx_registered.h>
#include <QxRegister/IxClass.h>
namespace qx
{
template <class T>
class QxClass;
/*!
* \ingroup QxDao
* \brief qx::QxSqlRelation<DataType, Owner> : base class for all relationships defined between 2 classes (or between 2 tables in database)
*/
template <class DataType, class Owner>
class QxSqlRelation : public IxSqlRelation
{
protected:
typedef typename qx::trait::remove_attr<DataType>::type type_tmp_1;
typedef typename qx::trait::remove_smart_ptr<type_tmp_1>::type type_tmp_2;
typedef type_tmp_2 type_container;
typedef qx::trait::generic_container<type_container> type_generic_container;
typedef typename type_generic_container::type_item type_item;
typedef typename std::conditional<qx::trait::is_container<type_container>::value, typename type_generic_container::type_value_qx, type_container>::type type_tmp_3;
typedef typename QxSqlRelation<DataType, Owner>::type_tmp_3 type_data;
typedef Owner type_owner;
enum
{
is_valid = (qx::trait::is_qx_registered<type_data>::value && qx::trait::is_qx_registered<type_owner>::value)
};
enum
{
is_data_pointer = (std::is_pointer<DataType>::value || qx::trait::is_smart_ptr<DataType>::value)
};
enum
{
is_data_container = qx::trait::is_container<type_container>::value
};
enum
{
is_same_data_owner = std::is_same<type_data, type_owner>::value
};
public:
QxSqlRelation(IxDataMember *p) : IxSqlRelation(p) { this->setIsSameDataOwner(static_cast<int>(is_same_data_owner)); }
virtual ~QxSqlRelation() { static_assert(is_valid, "is_valid"); }
virtual void init()
{
if (!this->canInit())
{
return;
}
this->setClass(QxClass<type_data>::getSingleton(), QxClass<type_owner>::getSingleton());
IxSqlRelation::init();
}
protected:
DataType *getDataTypePtr(QxSqlRelationParams &params) const
{
qAssert(params.owner() && this->getDataMember());
return static_cast<DataType *>(this->getDataMember()->getValueVoidPtr(params.owner()));
}
type_owner &getOwner(QxSqlRelationParams &params) const
{
qAssert(params.owner());
return (*static_cast<type_owner *>(params.owner()));
}
type_data &getData(QxSqlRelationParams &params) const
{
return getData_Helper<is_data_pointer, is_data_container, 0>::get(getDataTypePtr(params));
}
type_container &getContainer(QxSqlRelationParams &params) const
{
return getContainer_Helper<is_data_pointer, is_data_container, 0>::get(getDataTypePtr(params));
}
type_item createItem() const
{
return createItem_Helper<is_data_container, 0>::get();
}
bool isNullData(QxSqlRelationParams &params) const
{
return isNullData_Helper<is_data_pointer, 0>::get(getDataTypePtr(params));
}
bool callTriggerBeforeFetch(type_data &t, QxSqlRelationParams &params) const
{
if (!params.builder().getDaoHelper())
{
return true;
}
qx::dao::on_before_fetch<type_data>((&t), params.builder().getDaoHelper());
return params.builder().getDaoHelper()->isValid();
}
bool callTriggerAfterFetch(type_data &t, QxSqlRelationParams &params) const
{
if (!params.builder().getDaoHelper())
{
return true;
}
qx::dao::on_after_fetch<type_data>((&t), params.builder().getDaoHelper());
return params.builder().getDaoHelper()->isValid();
}
private:
template <bool bIsPointer /* = false */, bool bIsContainer /* = false */, int dummy>
struct getData_Helper
{
static type_data &get(DataType *t) { return (*t); }
};
template <int dummy>
struct getData_Helper<true, false, dummy>
{
static type_data &get(DataType *t)
{
if (!(*t))
{
qx::trait::construct_ptr<DataType>::get(*t);
};
return (**t);
}
};
template <int dummy>
struct getData_Helper<false, true, dummy>
{
static type_data &get(DataType *t)
{
qAssert(false);
Q_UNUSED(t);
type_data *pDummy(NULL);
return (*pDummy);
}
};
template <int dummy>
struct getData_Helper<true, true, dummy>
{
static type_data &get(DataType *t)
{
qAssert(false);
Q_UNUSED(t);
type_data *pDummy(NULL);
return (*pDummy);
}
};
template <bool bIsPointer /* = false */, bool bIsContainer /* = false */, int dummy>
struct getContainer_Helper
{
static type_container &get(DataType *t)
{
qAssert(false);
Q_UNUSED(t);
type_container *pDummy(NULL);
return (*pDummy);
}
};
template <int dummy>
struct getContainer_Helper<true, false, dummy>
{
static type_container &get(DataType *t)
{
qAssert(false);
Q_UNUSED(t);
type_container *pDummy(NULL);
return (*pDummy);
}
};
template <int dummy>
struct getContainer_Helper<false, true, dummy>
{
static type_container &get(DataType *t) { return (*t); }
};
template <int dummy>
struct getContainer_Helper<true, true, dummy>
{
static type_container &get(DataType *t)
{
if (!(*t))
{
qx::trait::construct_ptr<DataType>::get(*t);
};
return (**t);
}
};
template <bool bIsContainer /* = false */, int dummy>
struct createItem_Helper
{
static type_item get()
{
qAssert(false);
type_item *pDummy(NULL);
return (*pDummy);
}
};
template <int dummy>
struct createItem_Helper<true, dummy>
{
static type_item get() { return type_generic_container::createItem(); }
};
template <bool bIsPointer /* = false */, int dummy>
struct isNullData_Helper
{
static bool get(DataType *t)
{
Q_UNUSED(t);
return false;
}
};
template <int dummy>
struct isNullData_Helper<true, dummy>
{
static bool get(DataType *t) { return ((!(*t)) ? true : false); }
};
};
} // namespace qx
#include <QxDao/QxSqlRelation_OneToOne.h>
#include <QxDao/QxSqlRelation_OneToMany.h>
#include <QxDao/QxSqlRelation_ManyToOne.h>
#include <QxDao/QxSqlRelation_ManyToMany.h>
#include <QxDao/QxSqlRelation_RawData.h>
#endif // _QX_SQL_RELATION_H_