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QxOrm 1.1.6
C++ Object Relational Mapping library
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00001 /**************************************************************************** 00002 ** 00003 ** http://www.qxorm.com/ 00004 ** http://sourceforge.net/projects/qxorm/ 00005 ** Original file by Lionel Marty 00006 ** 00007 ** This file is part of the QxOrm library 00008 ** 00009 ** This software is provided 'as-is', without any express or implied 00010 ** warranty. In no event will the authors be held liable for any 00011 ** damages arising from the use of this software. 00012 ** 00013 ** GNU Lesser General Public License Usage 00014 ** This file must be used under the terms of the GNU Lesser 00015 ** General Public License version 2.1 as published by the Free Software 00016 ** Foundation and appearing in the file 'license.lgpl.txt' included in the 00017 ** packaging of this file. Please review the following information to 00018 ** ensure the GNU Lesser General Public License version 2.1 requirements 00019 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 00020 ** 00021 ** If you have questions regarding the use of this file, please contact : 00022 ** contact@qxorm.com 00023 ** 00024 ****************************************************************************/ 00025 00026 #ifndef _QX_SQL_RELATION_MANY_TO_ONE_H_ 00027 #define _QX_SQL_RELATION_MANY_TO_ONE_H_ 00028 00029 #ifdef _MSC_VER 00030 #pragma once 00031 #endif 00032 00040 #include <QxDao/QxSqlRelation.h> 00041 00042 namespace qx { 00043 00048 template <class DataType, class Owner> 00049 class QxSqlRelation_ManyToOne : public QxSqlRelation<DataType, Owner> 00050 { 00051 00052 private: 00053 00054 typedef typename QxSqlRelation<DataType, Owner>::type_owner type_owner; 00055 typedef typename QxSqlRelation<DataType, Owner>::type_data type_data; 00056 00057 public: 00058 00059 QxSqlRelation_ManyToOne(IxDataMember * p) : QxSqlRelation<DataType, Owner>(p) { ; } 00060 virtual ~QxSqlRelation_ManyToOne() { ; } 00061 00062 virtual bool getCartesianProduct() const { return false; } 00063 virtual void lazyFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00064 virtual void eagerFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00065 virtual void lazyJoin(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00066 virtual void lazyWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00067 virtual void eagerWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00068 virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00069 virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00070 virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00071 virtual QSqlError createExtraTable(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00072 00073 virtual QSqlError onAfterSave(QxSqlRelationParams & params) const 00074 { return qx::dao::save(this->getData(params), (& params.database())); } 00075 00076 virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const 00077 { this->lazyInsert_ResolveInput(params); } 00078 00079 virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const 00080 { 00081 Q_UNUSED(bEager); QString sId; IxDataMember * pId = this->getDataId(); if (! pId) { return QVariant(); } 00082 for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; } 00083 return QVariant(sId); 00084 } 00085 00086 virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const 00087 { 00088 long lOffsetDataMember = (this->getDataMember() ? this->getDataMember()->getNameCount() : 0); 00089 long lOffsetDataId = (bEager ? (this->getDataCount() + (this->getDataId() ? this->getDataId()->getNameCount() : 0)) : 0); 00090 params.setOffset(params.offset() + lOffsetDataMember + lOffsetDataId); 00091 } 00092 00093 virtual void createTable(QxSqlRelationParams & params) const 00094 { 00095 QString & sql = params.sql(); 00096 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00097 if (pData) { sql += pData->getSqlNameAndTypeAndParams(", ") + ", "; qAssert(! pData->getSqlType().isEmpty()); } 00098 } 00099 00100 virtual void lazySelect(QxSqlRelationParams & params) const 00101 { 00102 QString & sql = params.sql(); 00103 QString tableRef = params.builder().table(); 00104 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00105 if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); } 00106 } 00107 00108 virtual void eagerSelect(QxSqlRelationParams & params) const 00109 { 00110 long l1(0); 00111 QString & sql = params.sql(); 00112 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00113 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); 00114 //IxSqlRelation * pRelation = NULL; 00115 //QxSqlQueryBuilder<DataType> builderBis; 00116 //QxSqlRelationParams paramsBis(0, 0, (& sql), (& builderBis), NULL, NULL); 00117 QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table(); 00118 if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); } 00119 if (pId) { sql += (pId->getSqlTablePointNameAsAlias(tableAlias) + ", "); } 00120 while ((p = this->nextData(l1))) { sql += (p->getSqlTablePointNameAsAlias(tableAlias) + ", "); } 00121 //while ((pRelation = this->nextRelation(l2))) { params.setIndex(m_lOffsetRelation + l2); pRelation->lazySelect(paramsBis); } 00122 } 00123 00124 virtual void eagerJoin(QxSqlRelationParams & params) const 00125 { 00126 QString & sql = params.sql(); 00127 IxDataMember * pId = this->getDataId(); qAssert(pId); 00128 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00129 QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table(); 00130 if (! pId || ! pData) { return; } 00131 sql += this->getSqlJoin() + table + " " + tableAlias + " ON "; 00132 for (int i = 0; i < pId->getNameCount(); i++) 00133 { sql += pId->getSqlAlias(tableAlias, true, i) + " = " + pData->getSqlAlias(tableRef, true, i) + " AND "; } 00134 sql = sql.left(sql.count() - 5); // Remove last " AND " 00135 } 00136 00137 virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const 00138 { 00139 if (! this->verifyOffset(params, false)) { return; } 00140 QSqlQuery & query = params.query(); 00141 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00142 IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; } 00143 for (int i = 0; i < pData->getNameCount(); i++) 00144 { QVariant vId = query.value(params.offset() + i); pData->fromVariant((& currOwner), vId, i); } 00145 params.setOffset(params.offset() + (pData ? pData->getNameCount() : 0)); 00146 } 00147 00148 virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const 00149 { 00150 if (! this->verifyOffset(params, false)) { return; } 00151 QSqlQuery & query = params.query(); 00152 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00153 IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; } 00154 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; } 00155 long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetData = (pData ? pData->getNameCount() : 0); 00156 long lOffsetOld = params.offset(); params.setOffset(lOffsetOld + this->getDataCount() + lOffsetId + lOffsetData); 00157 long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetData); 00158 bool bValidId(false), bValidIdBis(false); 00159 for (int i = 0; i < pData->getNameCount(); i++) 00160 { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); } 00161 for (int i = 0; i < pId->getNameCount(); i++) 00162 { QVariant vIdBis = query.value(lOffsetOld + lOffsetData + i); bValidIdBis = (bValidIdBis || qx::trait::is_valid_primary_key(vIdBis)); } 00163 if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(lOffsetOld + i), i); } } 00164 if (! bValidIdBis) { return; } 00165 type_data & currData = this->getData(params); 00166 if (pId) { for (int i = 0; i < pId->getNameCount(); i++) { pId->fromVariant((& currData), query.value(lOffsetOld + lOffsetData + i), i); } } 00167 while ((p = this->nextData(lIndex))) 00168 { p->fromVariant((& currData), query.value(lOffsetRelation++)); } 00169 } 00170 00171 virtual void lazyInsert(QxSqlRelationParams & params) const 00172 { 00173 QString & sql = params.sql(); 00174 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00175 if (pData) { sql += pData->getSqlName(", ") + ", "; } 00176 } 00177 00178 virtual void lazyInsert_Values(QxSqlRelationParams & params) const 00179 { 00180 QString & sql = params.sql(); 00181 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00182 if (pData) { sql += pData->getSqlPlaceHolder("", -1, ", ") + ", "; } 00183 } 00184 00185 virtual void lazyUpdate(QxSqlRelationParams & params) const 00186 { 00187 QString & sql = params.sql(); 00188 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00189 if (pData) { sql += pData->getSqlNameEqualToPlaceHolder("", ", ") + ", "; } 00190 } 00191 00192 virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const 00193 { 00194 QSqlQuery & query = params.query(); 00195 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00196 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00197 if (pData) { pData->setSqlPlaceHolder(query, (& currOwner)); } 00198 } 00199 00200 }; 00201 00202 } // namespace qx 00203 00204 #endif // _QX_SQL_RELATION_MANY_TO_ONE_H_