![]() |
QxOrm 1.1.9
C++ Object Relational Mapping library
|
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 bool getCartesianProduct() const { return false; } 00064 virtual void createTable(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00065 virtual void lazySelect(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00066 virtual void lazyFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00067 virtual void eagerFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00068 virtual void lazyJoin(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00069 virtual void lazyWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00070 virtual void eagerWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00071 virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00072 virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00073 virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00074 virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00075 virtual void lazyInsert(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00076 virtual void lazyInsert_Values(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00077 virtual void lazyUpdate(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00078 virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00079 virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); } 00080 virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00081 virtual QSqlError createExtraTable(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); } 00082 00083 virtual QSqlError onAfterSave(QxSqlRelationParams & params) const 00084 { return qx::dao::save(this->getData(params), (& params.database())); } 00085 00086 virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const 00087 { 00088 QString sId; IxDataMember * pId = this->getDataId(); if (! bEager || ! pId) { return QVariant(); } 00089 for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; } 00090 return QVariant(sId); 00091 } 00092 00093 virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const 00094 { 00095 if (! bEager) { return; } 00096 long lOffsetNew = params.offset() + this->getDataCount(); 00097 lOffsetNew += (this->getDataId() ? this->getDataId()->getNameCount() : 0); 00098 lOffsetNew += (this->m_oSoftDelete.isEmpty() ? 0 : 1); 00099 params.setOffset(lOffsetNew); 00100 } 00101 00102 virtual void eagerSelect(QxSqlRelationParams & params) const 00103 { 00104 long l1(0); 00105 QString & sql = params.sql(); 00106 QString tableAlias = this->tableAlias(params); 00107 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); 00108 if (pId) { sql += (pId->getSqlTablePointNameAsAlias(tableAlias) + ", "); } 00109 while ((p = this->nextData(l1))) { sql += (p->getSqlTablePointNameAsAlias(tableAlias) + ", "); } 00110 if (! this->m_oSoftDelete.isEmpty()) { sql += (this->m_oSoftDelete.buildSqlTablePointName(tableAlias) + ", "); } 00111 } 00112 00113 virtual void eagerJoin(QxSqlRelationParams & params) const 00114 { 00115 QString & sql = params.sql(); 00116 IxDataMember * pId = this->getDataId(); qAssert(pId); 00117 IxDataMember * pIdRef = params.builder().getDataId(); qAssert(pIdRef); 00118 QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table(); 00119 if (! pId || ! pIdRef) { return; } 00120 sql += this->getSqlJoin() + table + " " + tableAlias + " ON "; 00121 for (int i = 0; i < pId->getNameCount(); i++) 00122 { sql += pId->getSqlAlias(tableAlias, true, i) + " = " + pIdRef->getSqlAlias(tableRef, true, i) + " AND "; } 00123 sql = sql.left(sql.count() - 5); // Remove last " AND " 00124 } 00125 00126 virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const 00127 { 00128 if (this->m_oSoftDelete.isEmpty()) { return; } 00129 QString & sql = params.sql(); 00130 QString tableAlias = this->tableAlias(params); 00131 sql += qx::IxSqlQueryBuilder::addSqlCondition(sql); 00132 sql += this->m_oSoftDelete.buildSqlQueryToFetch(tableAlias); 00133 } 00134 00135 virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const 00136 { 00137 if (! this->verifyOffset(params, true)) { return; } 00138 QSqlQuery & query = params.query(); 00139 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; } 00140 long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); bool bValidId(false); 00141 long lOffsetOld = params.offset(); this->updateOffset(true, params); 00142 for (int i = 0; i < pId->getNameCount(); i++) 00143 { QVariant v = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(v)); } 00144 if (! bValidId) { return; } 00145 type_data & currData = this->getData(params); 00146 for (int i = 0; i < pId->getNameCount(); i++) 00147 { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& currData), v, i); } 00148 while ((p = this->nextData(lIndex))) 00149 { p->fromVariant((& currData), query.value(lIndex + lOffsetOld + lOffsetId - 1)); } 00150 } 00151 00152 }; 00153 00154 } // namespace qx 00155 00156 #endif // _QX_SQL_RELATION_ONE_TO_ONE_H_