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QxSqlRelation_OneToOne.h
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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 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_

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