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QxOrm 1.1.9
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 QString getDescription() const { return "relation many-to-one"; } 00063 virtual bool getCartesianProduct() const { return false; } 00064 virtual void lazyFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00065 virtual void eagerFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00066 virtual void lazyJoin(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00067 virtual void lazyWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00068 virtual void eagerWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00069 virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00070 virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00071 virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00072 virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00073 virtual QSqlError createExtraTable(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00074 00075 virtual QSqlError onAfterSave(QxSqlRelationParams & params) const 00076 { return qx::dao::save(this->getData(params), (& params.database())); } 00077 00078 virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const 00079 { this->lazyInsert_ResolveInput(params); } 00080 00081 virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const 00082 { 00083 Q_UNUSED(bEager); QString sId; IxDataMember * pId = this->getDataId(); if (! pId) { return QVariant(); } 00084 for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; } 00085 return QVariant(sId); 00086 } 00087 00088 virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const 00089 { 00090 long lOffsetDataMember = (this->getDataMember() ? this->getDataMember()->getNameCount() : 0); 00091 long lOffsetDataId = (bEager ? (this->getDataId() ? this->getDataId()->getNameCount() : 0) : 0); 00092 long lOffsetDataCount = (bEager ? this->getDataCount() : 0); 00093 long lOffsetSoftDelete = (bEager ? (this->m_oSoftDelete.isEmpty() ? 0 : 1) : 0); 00094 params.setOffset(params.offset() + lOffsetDataMember + lOffsetDataId + lOffsetDataCount + lOffsetSoftDelete); 00095 } 00096 00097 virtual void createTable(QxSqlRelationParams & params) const 00098 { 00099 QString & sql = params.sql(); 00100 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00101 if (pData) { sql += pData->getSqlNameAndTypeAndParams(", ") + ", "; qAssert(! pData->getSqlType().isEmpty()); } 00102 } 00103 00104 virtual void lazySelect(QxSqlRelationParams & params) const 00105 { 00106 QString & sql = params.sql(); 00107 QString tableRef = params.builder().table(); 00108 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00109 if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); } 00110 } 00111 00112 virtual void eagerSelect(QxSqlRelationParams & params) const 00113 { 00114 long l1(0); 00115 QString & sql = params.sql(); 00116 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00117 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); 00118 QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table(); 00119 if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); } 00120 if (pId) { sql += (pId->getSqlTablePointNameAsAlias(tableAlias) + ", "); } 00121 while ((p = this->nextData(l1))) { sql += (p->getSqlTablePointNameAsAlias(tableAlias) + ", "); } 00122 if (! this->m_oSoftDelete.isEmpty()) { sql += (this->m_oSoftDelete.buildSqlTablePointName(tableAlias) + ", "); } 00123 } 00124 00125 virtual void eagerJoin(QxSqlRelationParams & params) const 00126 { 00127 QString & sql = params.sql(); 00128 IxDataMember * pId = this->getDataId(); qAssert(pId); 00129 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00130 QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table(); 00131 if (! pId || ! pData) { return; } 00132 sql += this->getSqlJoin() + table + " " + tableAlias + " ON "; 00133 for (int i = 0; i < pId->getNameCount(); i++) 00134 { sql += pId->getSqlAlias(tableAlias, true, i) + " = " + pData->getSqlAlias(tableRef, true, i) + " AND "; } 00135 sql = sql.left(sql.count() - 5); // Remove last " AND " 00136 } 00137 00138 virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const 00139 { 00140 if (this->m_oSoftDelete.isEmpty()) { return; } 00141 QString & sql = params.sql(); 00142 QString tableAlias = this->tableAlias(params); 00143 sql += qx::IxSqlQueryBuilder::addSqlCondition(sql); 00144 sql += this->m_oSoftDelete.buildSqlQueryToFetch(tableAlias); 00145 } 00146 00147 virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const 00148 { 00149 if (! this->verifyOffset(params, false)) { return; } 00150 QSqlQuery & query = params.query(); 00151 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00152 IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; } 00153 for (int i = 0; i < pData->getNameCount(); i++) 00154 { QVariant vId = query.value(params.offset() + i); pData->fromVariant((& currOwner), vId, i); } 00155 this->updateOffset(false, params); 00156 } 00157 00158 virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const 00159 { 00160 if (! this->verifyOffset(params, false)) { return; } 00161 QSqlQuery & query = params.query(); 00162 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00163 IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; } 00164 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; } 00165 long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetData = (pData ? pData->getNameCount() : 0); 00166 long lOffsetOld = params.offset(); this->updateOffset(true, params); 00167 long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetData); 00168 bool bValidId(false), bValidIdBis(false); 00169 for (int i = 0; i < pData->getNameCount(); i++) 00170 { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); } 00171 for (int i = 0; i < pId->getNameCount(); i++) 00172 { QVariant vIdBis = query.value(lOffsetOld + lOffsetData + i); bValidIdBis = (bValidIdBis || qx::trait::is_valid_primary_key(vIdBis)); } 00173 if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(lOffsetOld + i), i); } } 00174 if (! bValidIdBis) { return; } 00175 type_data & currData = this->getData(params); 00176 if (pId) { for (int i = 0; i < pId->getNameCount(); i++) { pId->fromVariant((& currData), query.value(lOffsetOld + lOffsetData + i), i); } } 00177 while ((p = this->nextData(lIndex))) 00178 { p->fromVariant((& currData), query.value(lOffsetRelation++)); } 00179 } 00180 00181 virtual void lazyInsert(QxSqlRelationParams & params) const 00182 { 00183 QString & sql = params.sql(); 00184 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00185 if (pData) { sql += pData->getSqlName(", ") + ", "; } 00186 } 00187 00188 virtual void lazyInsert_Values(QxSqlRelationParams & params) const 00189 { 00190 QString & sql = params.sql(); 00191 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00192 if (pData) { sql += pData->getSqlPlaceHolder("", -1, ", ") + ", "; } 00193 } 00194 00195 virtual void lazyUpdate(QxSqlRelationParams & params) const 00196 { 00197 QString & sql = params.sql(); 00198 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00199 if (pData) { sql += pData->getSqlNameEqualToPlaceHolder("", ", ") + ", "; } 00200 } 00201 00202 virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const 00203 { 00204 QSqlQuery & query = params.query(); 00205 typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params); 00206 IxDataMember * pData = this->getDataMember(); qAssert(pData); 00207 if (pData) { pData->setSqlPlaceHolder(query, (& currOwner)); } 00208 } 00209 00210 }; 00211 00212 } // namespace qx 00213 00214 #endif // _QX_SQL_RELATION_MANY_TO_ONE_H_