QxOrm 1.1.8
C++ Object Relational Mapping library
QxSqlRelation_OneToOne.h
Go to the documentation of this file.
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 bool getCartesianProduct() const                                   { return false; }
00063    virtual void createTable(QxSqlRelationParams & params) const               { Q_UNUSED(params); }
00064    virtual void lazySelect(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00065    virtual void lazyFrom(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00066    virtual void eagerFrom(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00067    virtual void lazyJoin(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00068    virtual void lazyWhere(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00069    virtual void eagerWhere(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00070    virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const       { Q_UNUSED(params); }
00071    virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
00072    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00073    virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00074    virtual void lazyInsert(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00075    virtual void lazyInsert_Values(QxSqlRelationParams & params) const         { Q_UNUSED(params); }
00076    virtual void lazyUpdate(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00077    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00078    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00079    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const         { Q_UNUSED(params); return QSqlError(); }
00080    virtual QSqlError createExtraTable(QxSqlRelationParams & params) const     { Q_UNUSED(params); return QSqlError(); }
00081 
00082    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
00083    { return qx::dao::save(this->getData(params), (& params.database())); }
00084 
00085    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
00086    {
00087       QString sId; IxDataMember * pId = this->getDataId(); if (! bEager || ! pId) { return QVariant(); }
00088       for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; }
00089       return QVariant(sId);
00090    }
00091 
00092    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
00093    {
00094       if (! bEager) { return; }
00095       long lOffsetNew = params.offset() + this->getDataCount();
00096       lOffsetNew += (this->getDataId() ? this->getDataId()->getNameCount() : 0);
00097       lOffsetNew += (this->m_oSoftDelete.isEmpty() ? 0 : 1);
00098       params.setOffset(lOffsetNew);
00099    }
00100 
00101    virtual void eagerSelect(QxSqlRelationParams & params) const
00102    {
00103       long l1(0);
00104       QString & sql = params.sql();
00105       QString tableAlias = this->tableAlias(params);
00106       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId);
00107       if (pId) { sql += (pId->getSqlTablePointNameAsAlias(tableAlias) + ", "); }
00108       while ((p = this->nextData(l1))) { sql += (p->getSqlTablePointNameAsAlias(tableAlias) + ", "); }
00109       if (! this->m_oSoftDelete.isEmpty()) { sql += (this->m_oSoftDelete.buildSqlTablePointName(tableAlias) + ", "); }
00110    }
00111 
00112    virtual void eagerJoin(QxSqlRelationParams & params) const
00113    {
00114       QString & sql = params.sql();
00115       IxDataMember * pId = this->getDataId(); qAssert(pId);
00116       IxDataMember * pIdRef = params.builder().getDataId(); qAssert(pIdRef);
00117       QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table();
00118       if (! pId || ! pIdRef) { return; }
00119       sql += this->getSqlJoin() + table + " " + tableAlias + " ON ";
00120       for (int i = 0; i < pId->getNameCount(); i++)
00121       { sql += pId->getSqlAlias(tableAlias, true, i) + " = " + pIdRef->getSqlAlias(tableRef, true, i) + " AND "; }
00122       sql = sql.left(sql.count() - 5); // Remove last " AND "
00123    }
00124 
00125    virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
00126    {
00127       if (this->m_oSoftDelete.isEmpty()) { return; }
00128       QString & sql = params.sql();
00129       QString tableAlias = this->tableAlias(params);
00130       sql += qx::IxSqlQueryBuilder::addSqlCondition(sql);
00131       sql += this->m_oSoftDelete.buildSqlQueryToFetch(tableAlias);
00132    }
00133 
00134    virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
00135    {
00136       if (! this->verifyOffset(params, true)) { return; }
00137       QSqlQuery & query = params.query();
00138       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; }
00139       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); bool bValidId(false);
00140       long lOffsetOld = params.offset(); this->updateOffset(true, params);
00141       for (int i = 0; i < pId->getNameCount(); i++)
00142       { QVariant v = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(v)); }
00143       if (! bValidId) { return; }
00144       type_data & currData = this->getData(params);
00145       for (int i = 0; i < pId->getNameCount(); i++)
00146       { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& currData), v, i); }
00147       while ((p = this->nextData(lIndex)))
00148       { p->fromVariant((& currData), query.value(lIndex + lOffsetOld + lOffsetId - 1)); }
00149    }
00150 
00151 };
00152 
00153 } // namespace qx
00154 
00155 #endif // _QX_SQL_RELATION_ONE_TO_ONE_H_
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines