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QxOrm
1.2.3
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_ONE_TO_ONE_H_ 00027 #define _QX_SQL_RELATION_ONE_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_OneToOne : 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_OneToOne(IxDataMember * p) : QxSqlRelation<DataType, Owner>(p) { ; } 00060 virtual ~QxSqlRelation_OneToOne() { ; } 00061 00062 virtual QString getDescription() const { return "relation one-to-one"; } 00063 virtual QString getExtraTable() const { return ""; } 00064 virtual QString createExtraTable() const { return ""; } 00065 virtual bool getCartesianProduct() const { return false; } 00066 virtual void createTable(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00067 virtual void lazySelect(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00068 virtual void lazyFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00069 virtual void eagerFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00070 virtual void lazyJoin(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00071 virtual void lazyWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00072 virtual void eagerWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00073 virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00074 virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00075 virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00076 virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00077 virtual void lazyInsert(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00078 virtual void lazyInsert_Values(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00079 virtual void lazyUpdate(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00080 virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00081 virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00082 virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00083 00084 virtual QSqlError onAfterSave(QxSqlRelationParams & params) const 00085 { return qx::dao::save(this->getData(params), (& params.database())); } 00086 00087 virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const 00088 { 00089 QString sId; IxDataMember * pId = this->getDataId(); if (! bEager || ! pId) { return QVariant(); } 00090 for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; } 00091 return QVariant(sId); 00092 } 00093 00094 virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const 00095 { 00096 if (! bEager) { return; } 00097 long lOffsetNew = params.offset() + this->getDataCount(); 00098 lOffsetNew += (this->getDataId() ? this->getDataId()->getNameCount() : 0); 00099 lOffsetNew += (this->m_oSoftDelete.isEmpty() ? 0 : 1); 00100 params.setOffset(lOffsetNew); 00101 } 00102 00103 virtual void eagerSelect(QxSqlRelationParams & params) const 00104 { 00105 long l1(0); 00106 QString & sql = params.sql(); 00107 QString tableAlias = this->tableAlias(params); 00108 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); 00109 if (pId) { sql += (pId->getSqlTablePointNameAsAlias(tableAlias) + ", "); } 00110 while ((p = this->nextData(l1))) { sql += (p->getSqlTablePointNameAsAlias(tableAlias) + ", "); } 00111 if (! this->m_oSoftDelete.isEmpty()) { sql += (this->m_oSoftDelete.buildSqlTablePointName(tableAlias) + ", "); } 00112 } 00113 00114 virtual void eagerJoin(QxSqlRelationParams & params) const 00115 { 00116 QString & sql = params.sql(); 00117 IxDataMember * pId = this->getDataId(); qAssert(pId); 00118 IxDataMember * pIdRef = params.builder().getDataId(); qAssert(pIdRef); 00119 QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table(); 00120 if (! pId || ! pIdRef) { return; } 00121 sql += this->getSqlJoin() + table + " " + tableAlias + " ON "; 00122 params.builder().addSqlQueryAlias(table, tableAlias); 00123 for (int i = 0; i < pId->getNameCount(); i++) 00124 { sql += pId->getSqlAlias(tableAlias, true, i) + " = " + pIdRef->getSqlAlias(tableRef, true, i) + " AND "; } 00125 sql = sql.left(sql.count() - 5); // Remove last " AND " 00126 } 00127 00128 virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const 00129 { 00130 if (this->m_oSoftDelete.isEmpty()) { return; } 00131 QString & sql = params.sql(); 00132 QString tableAlias = this->tableAlias(params); 00133 sql += qx::IxSqlQueryBuilder::addSqlCondition(sql); 00134 sql += this->m_oSoftDelete.buildSqlQueryToFetch(tableAlias); 00135 } 00136 00137 virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const 00138 { 00139 if (! this->verifyOffset(params, true)) { return; } 00140 QSqlQuery & query = params.query(); 00141 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; } 00142 long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); bool bValidId(false); 00143 long lOffsetOld = params.offset(); this->updateOffset(true, params); 00144 for (int i = 0; i < pId->getNameCount(); i++) 00145 { QVariant v = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(v)); } 00146 if (! bValidId) { return; } 00147 type_data & currData = this->getData(params); 00148 for (int i = 0; i < pId->getNameCount(); i++) 00149 { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& currData), v, i); } 00150 while ((p = this->nextData(lIndex))) 00151 { p->fromVariant((& currData), query.value(lIndex + lOffsetOld + lOffsetId - 1)); } 00152 } 00153 00154 }; 00155 00156 } // namespace qx 00157 00158 #endif // _QX_SQL_RELATION_ONE_TO_ONE_H_