QxOrm  1.4.5
C++ Object Relational Mapping library
QxSqlRelation_ManyToOne.h
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00031 
00032 #ifndef _QX_SQL_RELATION_MANY_TO_ONE_H_
00033 #define _QX_SQL_RELATION_MANY_TO_ONE_H_
00034 
00035 #ifdef _MSC_VER
00036 #pragma once
00037 #endif
00038 
00046 #include <QxDao/QxSqlRelation.h>
00047 
00048 namespace qx {
00049 
00054 template <class DataType, class Owner>
00055 class QxSqlRelation_ManyToOne : public QxSqlRelation<DataType, Owner>
00056 {
00057 
00058 private:
00059 
00060    typedef typename QxSqlRelation<DataType, Owner>::type_owner type_owner;
00061    typedef typename QxSqlRelation<DataType, Owner>::type_data type_data;
00062 
00063 public:
00064 
00065    QxSqlRelation_ManyToOne(IxDataMember * p) : QxSqlRelation<DataType, Owner>(p) { this->setRelationType(qx::IxSqlRelation::many_to_one); }
00066    virtual ~QxSqlRelation_ManyToOne() { ; }
00067 
00068    virtual QString getDescription() const                                     { return "relation many-to-one"; }
00069    virtual QString createExtraTable() const                                   { return ""; }
00070    virtual bool getCartesianProduct() const                                   { return false; }
00071    virtual void lazyFrom(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00072    virtual void eagerFrom(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00073    virtual void lazyJoin(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00074    virtual void lazyWhere(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00075    virtual void eagerWhere(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00076    virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const       { Q_UNUSED(params); }
00077    virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
00078    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00079    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const          { Q_UNUSED(params); return QSqlError(); }
00080 
00081    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const
00082    {
00083       if (this->isNullData(params) || params.recursiveMode()) { return QSqlError(); }
00084       return qx::dao::save(this->getData(params), (& params.database()));
00085    }
00086 
00087    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const
00088    { this->lazyInsert_ResolveInput(params); }
00089 
00090    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
00091    { return this->getIdFromQuery_ManyToOne(bEager, params); }
00092 
00093    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
00094    { this->updateOffset_ManyToOne(bEager, params); }
00095 
00096    virtual void createTable(QxSqlRelationParams & params) const
00097    { this->createTable_ManyToOne(params); }
00098 
00099    virtual void lazySelect(QxSqlRelationParams & params) const
00100    { this->lazySelect_ManyToOne(params); }
00101 
00102    virtual void eagerSelect(QxSqlRelationParams & params) const
00103    { this->eagerSelect_ManyToOne(params); }
00104 
00105    virtual void eagerJoin(QxSqlRelationParams & params) const
00106    { this->eagerJoin_ManyToOne(params); }
00107 
00108    virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
00109    { this->eagerWhereSoftDelete_ManyToOne(params); }
00110 
00111    virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const
00112    {
00113       if (! this->verifyOffset(params, false)) { return; }
00114       QSqlQuery & query = params.query();
00115       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00116       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00117       bool bValidId(false);
00118       for (int i = 0; i < pData->getNameCount(); i++)
00119       { QVariant vId = query.value(params.offset() + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
00120       if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(params.offset() + i), i, qx::cvt::context::e_database); } }
00121       this->updateOffset(false, params);
00122    }
00123 
00124    virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
00125    {
00126       if (! this->verifyOffset(params, false)) { return NULL; }
00127       QSqlQuery & query = params.query();
00128       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00129       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return NULL; }
00130       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return NULL; }
00131       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetData = (pData ? pData->getNameCount() : 0);
00132       long lOffsetOld = params.offset(); this->updateOffset(true, params);
00133       long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetData);
00134       long lRelation = 0; IxSqlRelation * pRelation = NULL;
00135       bool bValidId(false), bValidIdBis(false);
00136       for (int i = 0; i < pData->getNameCount(); i++)
00137       { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
00138       for (int i = 0; i < pId->getNameCount(); i++)
00139       { QVariant vIdBis = query.value(lOffsetOld + lOffsetData + i); bValidIdBis = (bValidIdBis || qx::trait::is_valid_primary_key(vIdBis)); }
00140       if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(lOffsetOld + i), i, qx::cvt::context::e_database); } }
00141       if (! bValidIdBis) { return NULL; }
00142 
00143       type_data & currData = this->getData(params);
00144       if (! this->callTriggerBeforeFetch(currData, params)) { return NULL; }
00145       if (pId) { for (int i = 0; i < pId->getNameCount(); i++) { pId->fromVariant((& currData), query.value(lOffsetOld + lOffsetData + i), i, qx::cvt::context::e_database); } }
00146       while ((p = this->nextData(lIndex)))
00147       { if (params.checkColumns(p->getKey())) { p->fromVariant((& currData), query.value(lOffsetRelation++), -1, qx::cvt::context::e_database); } }
00148 
00149       if (params.relationX())
00150       {
00151          long lIndexOwnerOld = params.indexOwner(); params.setIndexOwner(params.index());
00152          void * pOwnerOld = params.owner(); params.setOwner(& currData);
00153          lOffsetOld = params.offset(); params.setOffset(lOffsetRelation++);
00154          while ((pRelation = this->nextRelation(lRelation)))
00155          { if (this->addLazyRelation(params, pRelation)) { pRelation->lazyFetch_ResolveOutput(params); } }
00156          params.setOwner(pOwnerOld); params.setOffset(lOffsetOld);
00157          params.setIndexOwner(lIndexOwnerOld);
00158       }
00159 
00160       if (! this->callTriggerAfterFetch(currData, params)) { return NULL; }
00161       return (& currData);
00162    }
00163 
00164    virtual void lazyInsert(QxSqlRelationParams & params) const
00165    { this->lazyInsert_ManyToOne(params); }
00166 
00167    virtual void lazyInsert_Values(QxSqlRelationParams & params) const
00168    { this->lazyInsert_Values_ManyToOne(params); }
00169 
00170    virtual void lazyUpdate(QxSqlRelationParams & params) const
00171    { this->lazyUpdate_ManyToOne(params); }
00172 
00173    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const
00174    {
00175       QSqlQuery & query = params.query();
00176       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00177       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00178       if (pData) { pData->setSqlPlaceHolder(query, (& currOwner)); }
00179    }
00180 
00181 };
00182 
00183 } // namespace qx
00184 
00185 #endif // _QX_SQL_RELATION_MANY_TO_ONE_H_