QxOrm  1.2.3
C++ Object Relational Mapping library
QxSqlRelation_OneToOne.h
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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
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00013 ** GNU Lesser General Public License Usage
00014 ** This file must be used under the terms of the GNU Lesser
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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_