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QxOrm
1.4.3
C++ Object Relational Mapping library
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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_