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QxOrm 1.1.8
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 lazyWhereSoftDelete(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00069 virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00070 virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00071 virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00072 virtual QSqlError createExtraTable(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00073 00074 virtual QSqlError onAfterSave(QxSqlRelationParams & params) const 00075 { return qx::dao::save(this->getData(params), (& params.database())); } 00076 00077 virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const 00078 { this->lazyInsert_ResolveInput(params); } 00079 00080 virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const 00081 { 00082 Q_UNUSED(bEager); QString sId; IxDataMember * pId = this->getDataId(); if (! pId) { return QVariant(); } 00083 for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; } 00084 return QVariant(sId); 00085 } 00086 00087 virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const 00088 { 00089 long lOffsetDataMember = (this->getDataMember() ? this->getDataMember()->getNameCount() : 0); 00090 long lOffsetDataId = (bEager ? (this->getDataId() ? this->getDataId()->getNameCount() : 0) : 0); 00091 long lOffsetDataCount = (bEager ? this->getDataCount() : 0); 00092 long lOffsetSoftDelete = (bEager ? (this->m_oSoftDelete.isEmpty() ? 0 : 1) : 0); 00093 params.setOffset(params.offset() + lOffsetDataMember + lOffsetDataId + lOffsetDataCount + lOffsetSoftDelete); 00094 } 00095 00096 virtual void createTable(QxSqlRelationParams & params) const 00097 { 00098 QString & sql = params.sql(); 00099 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00100 if (pData) { sql += pData->getSqlNameAndTypeAndParams(", ") + ", "; qAssert(! pData->getSqlType().isEmpty()); } 00101 } 00102 00103 virtual void lazySelect(QxSqlRelationParams & params) const 00104 { 00105 QString & sql = params.sql(); 00106 QString tableRef = params.builder().table(); 00107 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00108 if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); } 00109 } 00110 00111 virtual void eagerSelect(QxSqlRelationParams & params) const 00112 { 00113 long l1(0); 00114 QString & sql = params.sql(); 00115 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00116 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); 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 if (! this->m_oSoftDelete.isEmpty()) { sql += (this->m_oSoftDelete.buildSqlTablePointName(tableAlias) + ", "); } 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 eagerWhereSoftDelete(QxSqlRelationParams & params) const 00138 { 00139 if (this->m_oSoftDelete.isEmpty()) { return; } 00140 QString & sql = params.sql(); 00141 QString tableAlias = this->tableAlias(params); 00142 sql += qx::IxSqlQueryBuilder::addSqlCondition(sql); 00143 sql += this->m_oSoftDelete.buildSqlQueryToFetch(tableAlias); 00144 } 00145 00146 virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const 00147 { 00148 if (! this->verifyOffset(params, false)) { return; } 00149 QSqlQuery & query = params.query(); 00150 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00151 IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; } 00152 for (int i = 0; i < pData->getNameCount(); i++) 00153 { QVariant vId = query.value(params.offset() + i); pData->fromVariant((& currOwner), vId, i); } 00154 this->updateOffset(false, params); 00155 } 00156 00157 virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const 00158 { 00159 if (! this->verifyOffset(params, false)) { return; } 00160 QSqlQuery & query = params.query(); 00161 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00162 IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; } 00163 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; } 00164 long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetData = (pData ? pData->getNameCount() : 0); 00165 long lOffsetOld = params.offset(); this->updateOffset(true, params); 00166 long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetData); 00167 bool bValidId(false), bValidIdBis(false); 00168 for (int i = 0; i < pData->getNameCount(); i++) 00169 { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); } 00170 for (int i = 0; i < pId->getNameCount(); i++) 00171 { QVariant vIdBis = query.value(lOffsetOld + lOffsetData + i); bValidIdBis = (bValidIdBis || qx::trait::is_valid_primary_key(vIdBis)); } 00172 if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(lOffsetOld + i), i); } } 00173 if (! bValidIdBis) { return; } 00174 type_data & currData = this->getData(params); 00175 if (pId) { for (int i = 0; i < pId->getNameCount(); i++) { pId->fromVariant((& currData), query.value(lOffsetOld + lOffsetData + i), i); } } 00176 while ((p = this->nextData(lIndex))) 00177 { p->fromVariant((& currData), query.value(lOffsetRelation++)); } 00178 } 00179 00180 virtual void lazyInsert(QxSqlRelationParams & params) const 00181 { 00182 QString & sql = params.sql(); 00183 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00184 if (pData) { sql += pData->getSqlName(", ") + ", "; } 00185 } 00186 00187 virtual void lazyInsert_Values(QxSqlRelationParams & params) const 00188 { 00189 QString & sql = params.sql(); 00190 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00191 if (pData) { sql += pData->getSqlPlaceHolder("", -1, ", ") + ", "; } 00192 } 00193 00194 virtual void lazyUpdate(QxSqlRelationParams & params) const 00195 { 00196 QString & sql = params.sql(); 00197 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00198 if (pData) { sql += pData->getSqlNameEqualToPlaceHolder("", ", ") + ", "; } 00199 } 00200 00201 virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const 00202 { 00203 QSqlQuery & query = params.query(); 00204 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00205 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00206 if (pData) { pData->setSqlPlaceHolder(query, (& currOwner)); } 00207 } 00208 00209 }; 00210 00211 } // namespace qx 00212 00213 #endif // _QX_SQL_RELATION_MANY_TO_ONE_H_