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QxSqlRelation.h
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    00001 /****************************************************************************
    00002 **
    00003 ** http://www.qxorm.com/
    00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
    00005 **
    00006 ** This file is part of the QxOrm library
    00007 **
    00008 ** This software is provided 'as-is', without any express or implied
    00009 ** warranty. In no event will the authors be held liable for any
    00010 ** damages arising from the use of this software
    00011 **
    00012 ** Commercial Usage
    00013 ** Licensees holding valid commercial QxOrm licenses may use this file in
    00014 ** accordance with the commercial license agreement provided with the
    00015 ** Software or, alternatively, in accordance with the terms contained in
    00016 ** a written agreement between you and Lionel Marty
    00017 **
    00018 ** GNU General Public License Usage
    00019 ** Alternatively, this file may be used under the terms of the GNU
    00020 ** General Public License version 3.0 as published by the Free Software
    00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the
    00022 ** packaging of this file. Please review the following information to
    00023 ** ensure the GNU General Public License version 3.0 requirements will be
    00024 ** met : http://www.gnu.org/copyleft/gpl.html
    00025 **
    00026 ** If you are unsure which license is appropriate for your use, or
    00027 ** if you have questions regarding the use of this file, please contact :
    00028 ** contact@qxorm.com
    00029 **
    00030 ****************************************************************************/
    00031
    00032 #ifndef _QX_SQL_RELATION_H_
    00033 #define _QX_SQL_RELATION_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00046 #include <boost/mpl/if.hpp>
    00047 #include <boost/mpl/logical.hpp>
    00048 #include <boost/type_traits/is_same.hpp>
    00049 #include <boost/type_traits/is_pointer.hpp>
    00050
    00051 #include <QxDao/QxDao.h>
    00052 #include <QxDao/IxSqlRelation.h>
    00053 #include <QxDao/IxSqlQueryBuilder.h>
    00054
    00055 #include <QxTraits/remove_attr.h>
    00056 #include <QxTraits/remove_smart_ptr.h>
    00057 #include <QxTraits/generic_container.h>
    00058 #include <QxTraits/is_container.h>
    00059 #include <QxTraits/is_valid_primary_key.h>
    00060 #include <QxTraits/is_qx_registered.h>
    00061
    00062 #include <QxRegister/IxClass.h>
    00063
    00064 namespace qx {
    00065
    00066 template <class T>
    00067 class QxClass;
    00068
    00073 template <class DataType, class Owner>
    00074 class QxSqlRelation : public IxSqlRelation
    00075 {
    00076
    00077 protected:
    00078
    00079    typedef typename qx::trait::remove_attr<DataType>::type type_tmp_1;
    00080    typedef typename qx::trait::remove_smart_ptr<type_tmp_1>::type type_tmp_2;
    00081    typedef type_tmp_2 type_container;
    00082    typedef qx::trait::generic_container<type_container> type_generic_container;
    00083    typedef typename type_generic_container::type_item type_item;
    00084    typedef typename boost::mpl::if_c<qx::trait::is_container<type_container>::value, typename type_generic_container::type_value_qx, type_container>::type type_tmp_3;
    00085    typedef typename QxSqlRelation<DataType, Owner>::type_tmp_3 type_data;
    00086    typedef Owner type_owner;
    00087
    00088    enum { is_valid = (qx::trait::is_qx_registered<type_data>::value && qx::trait::is_qx_registered<type_owner>::value) };
    00089    enum { is_data_pointer = (boost::is_pointer<DataType>::value || qx::trait::is_smart_ptr<DataType>::value) };
    00090    enum { is_data_container = qx::trait::is_container<type_container>::value };
    00091    enum { is_same_data_owner = boost::is_same<type_data, type_owner>::value };
    00092
    00093 public:
    00094
    00095    QxSqlRelation(IxDataMember * p) : IxSqlRelation(p) { this->m_iIsSameDataOwner = static_cast<int>(is_same_data_owner); }
    00096    virtual ~QxSqlRelation() { BOOST_STATIC_ASSERT(is_valid); }
    00097
    00098    virtual void init()
    00099    {
    00100       if (m_bInitInEvent || m_bInitDone) { return; }
    00101       m_pClass = QxClass<type_data>::getSingleton();
    00102       m_pClassOwner = QxClass<type_owner>::getSingleton();
    00103       IxSqlRelation::init();
    00104    }
    00105
    00106 protected:
    00107
    00108    inline DataType * getDataTypePtr(QxSqlRelationParams & params) const
    00109    { qAssert(params.owner() && m_pDataMember); return static_cast<DataType *>(m_pDataMember->getValueVoidPtr(params.owner())); }
    00110
    00111    inline type_owner & getOwner(QxSqlRelationParams & params) const
    00112    { qAssert(params.owner()); return (* static_cast<type_owner *>(params.owner())); }
    00113
    00114    inline type_data & getData(QxSqlRelationParams & params) const
    00115    { return getData_Helper<is_data_pointer, is_data_container, 0>::get(getDataTypePtr(params)); }
    00116
    00117    inline type_container & getContainer(QxSqlRelationParams & params) const
    00118    { return getContainer_Helper<is_data_pointer, is_data_container, 0>::get(getDataTypePtr(params)); }
    00119
    00120    inline type_item createItem() const
    00121    { return createItem_Helper<is_data_container, 0>::get(); }
    00122
    00123    inline bool isNullData(QxSqlRelationParams & params) const
    00124    { return isNullData_Helper<is_data_pointer, 0>::get(getDataTypePtr(params)); }
    00125
    00126    bool callTriggerBeforeFetch(type_data & t, QxSqlRelationParams & params) const
    00127    {
    00128       if (! params.builder().getDaoHelper()) { return true; }
    00129       qx::dao::on_before_fetch<type_data>((& t), params.builder().getDaoHelper());
    00130       return params.builder().getDaoHelper()->isValid();
    00131    }
    00132
    00133    bool callTriggerAfterFetch(type_data & t, QxSqlRelationParams & params) const
    00134    {
    00135       if (! params.builder().getDaoHelper()) { return true; }
    00136       qx::dao::on_after_fetch<type_data>((& t), params.builder().getDaoHelper());
    00137       return params.builder().getDaoHelper()->isValid();
    00138    }
    00139
    00140 private:
    00141
    00142    template <bool bIsPointer /* = false */, bool bIsContainer /* = false */, int dummy>
    00143    struct getData_Helper
    00144    { static inline type_data & get(DataType * t) { return (* t); } };
    00145
    00146    template <int dummy>
    00147    struct getData_Helper<true, false, dummy>
    00148    { static inline type_data & get(DataType * t) { if (! (* t)) { qx::trait::construct_ptr<DataType>::get(* t); }; return (** t); } };
    00149
    00150    template <int dummy>
    00151    struct getData_Helper<false, true, dummy>
    00152    { static inline type_data & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_data * pDummy(NULL); return (* pDummy); } };
    00153
    00154    template <int dummy>
    00155    struct getData_Helper<true, true, dummy>
    00156    { static inline type_data & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_data * pDummy(NULL); return (* pDummy); } };
    00157
    00158    template <bool bIsPointer /* = false */, bool bIsContainer /* = false */, int dummy>
    00159    struct getContainer_Helper
    00160    { static inline type_container & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_container * pDummy(NULL); return (* pDummy); } };
    00161
    00162    template <int dummy>
    00163    struct getContainer_Helper<true, false, dummy>
    00164    { static inline type_container & get(DataType * t) { qAssert(false); Q_UNUSED(t); type_container * pDummy(NULL); return (* pDummy); } };
    00165
    00166    template <int dummy>
    00167    struct getContainer_Helper<false, true, dummy>
    00168    { static inline type_container & get(DataType * t) { return (* t); } };
    00169
    00170    template <int dummy>
    00171    struct getContainer_Helper<true, true, dummy>
    00172    { static inline type_container & get(DataType * t) { if (! (* t)) { qx::trait::construct_ptr<DataType>::get(* t); }; return (** t); } };
    00173
    00174    template <bool bIsContainer /* = false */, int dummy>
    00175    struct createItem_Helper
    00176    { static inline type_item get() { qAssert(false); type_item * pDummy(NULL); return (* pDummy); } };
    00177
    00178    template <int dummy>
    00179    struct createItem_Helper<true, dummy>
    00180    { static inline type_item get() { return type_generic_container::createItem(); } };
    00181
    00182    template <bool bIsPointer /* = false */, int dummy>
    00183    struct isNullData_Helper
    00184    { static inline bool get(DataType * t) { Q_UNUSED(t); return false; } };
    00185
    00186    template <int dummy>
    00187    struct isNullData_Helper<true, dummy>
    00188    { static inline bool get(DataType * t) { return ((! (* t)) ? true : false); } };
    00189
    00190 };
    00191
    00192 } // namespace qx
    00193
    00194 #include <QxDao/QxSqlRelation_OneToOne.h>
    00195 #include <QxDao/QxSqlRelation_OneToMany.h>
    00196 #include <QxDao/QxSqlRelation_ManyToOne.h>
    00197 #include <QxDao/QxSqlRelation_ManyToMany.h>
    00198 #include <QxDao/QxSqlRelation_RawData.h>
    00199
    00200 #endif // _QX_SQL_RELATION_H_