QxOrm  1.4.5
C++ Object Relational Mapping library
QxSqlRelation_OneToMany.h
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00031 
00032 #ifndef _QX_SQL_RELATION_ONE_TO_MANY_H_
00033 #define _QX_SQL_RELATION_ONE_TO_MANY_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_OneToMany : 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    typedef typename QxSqlRelation<DataType, Owner>::type_container type_container;
00063    typedef typename QxSqlRelation<DataType, Owner>::type_generic_container type_generic_container;
00064    typedef typename QxSqlRelation<DataType, Owner>::type_item type_item;
00065    typedef typename type_generic_container::type_iterator type_iterator;
00066    typedef typename type_item::type_value type_value;
00067 
00068    enum { is_data_container = QxSqlRelation<DataType, Owner>::is_data_container };
00069 
00070 public:
00071 
00072    QxSqlRelation_OneToMany(IxDataMember * p, const QString & sForeignKey) : QxSqlRelation<DataType, Owner>(p) { this->setRelationType(qx::IxSqlRelation::one_to_many); this->setForeignKey(sForeignKey); qAssert(! this->getForeignKey().isEmpty()); }
00073    virtual ~QxSqlRelation_OneToMany() { static_assert(is_data_container, "is_data_container"); }
00074 
00075    virtual QString getDescription() const                                     { return "relation one-to-many"; }
00076    virtual QString createExtraTable() const                                   { return ""; }
00077    virtual bool getCartesianProduct() const                                   { return true; }
00078    virtual void createTable(QxSqlRelationParams & params) const               { Q_UNUSED(params); }
00079    virtual void lazySelect(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00080    virtual void lazyFrom(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00081    virtual void eagerFrom(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00082    virtual void lazyJoin(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00083    virtual void lazyWhere(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00084    virtual void eagerWhere(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00085    virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const       { Q_UNUSED(params); }
00086    virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
00087    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00088    virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00089    virtual void lazyInsert(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00090    virtual void lazyInsert_Values(QxSqlRelationParams & params) const         { Q_UNUSED(params); }
00091    virtual void lazyUpdate(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00092    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00093    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00094    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const         { Q_UNUSED(params); return QSqlError(); }
00095 
00096    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
00097    {
00098       if (this->isNullData(params)) { return QSqlError(); }
00099       this->forceParentIdToAllChildren(params);
00100       if (! params.recursiveMode()) { return qx::dao::save(this->getContainer(params), (& params.database())); }
00101       else { return qx::dao::save_with_relation_recursive(this->getContainer(params), params.saveMode(), (& params.database()), (& params)); }
00102    }
00103 
00104    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
00105    { return this->getIdFromQuery_OneToMany(bEager, params); }
00106 
00107    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
00108    { this->updateOffset_OneToMany(bEager, params); }
00109 
00110    virtual void eagerSelect(QxSqlRelationParams & params) const
00111    { this->eagerSelect_OneToMany(params); }
00112 
00113    virtual void eagerJoin(QxSqlRelationParams & params) const
00114    { this->eagerJoin_OneToMany(params); }
00115 
00116    virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
00117    { this->eagerWhereSoftDelete_OneToMany(params); }
00118 
00119    virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
00120    {
00121       if (! this->verifyOffset(params, true)) { return NULL; }
00122       QSqlQuery & query = params.query();
00123       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return NULL; }
00124       IxDataMember * pForeign = this->getDataByKey(this->getForeignKey()); qAssert(pForeign); if (! pForeign) { return NULL; }
00125       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetForeign = (pForeign ? pForeign->getNameCount() : 0);
00126       long lOffsetOld = params.offset(); this->updateOffset(true, params);
00127       long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetForeign);
00128       long lRelation = 0; IxSqlRelation * pRelation = NULL;
00129       bool bValidId(false), bValidForeign(false);
00130       for (int i = 0; i < pId->getNameCount(); i++)
00131       { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
00132       for (int i = 0; i < pForeign->getNameCount(); i++)
00133       { QVariant vForeign = query.value(lOffsetOld + lOffsetId + i); bValidForeign = (bValidForeign || qx::trait::is_valid_primary_key(vForeign)); }
00134       if (! bValidId || ! bValidForeign) { return NULL; }
00135 
00136       type_item item = this->createItem();
00137       type_data & item_val = item.value_qx();
00138       if (! this->callTriggerBeforeFetch(item_val, params)) { return NULL; }
00139       for (int i = 0; i < pId->getNameCount(); i++)
00140       { QVariant v = query.value(lOffsetOld + i); qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database); }
00141       for (int i = 0; i < pId->getNameCount(); i++)
00142       { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
00143       for (int i = 0; i < pForeign->getNameCount(); i++)
00144       { QVariant v = query.value(lOffsetOld + lOffsetId + i); pForeign->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
00145       while ((p = this->nextData(lIndex)))
00146       { if ((p != pForeign) && (params.checkColumns(p->getKey()))) { p->fromVariant((& item_val), query.value(lOffsetRelation++), -1, qx::cvt::context::e_database); } }
00147 
00148       if (params.relationX())
00149       {
00150          long lIndexOwnerOld = params.indexOwner(); params.setIndexOwner(params.index());
00151          void * pOwnerOld = params.owner(); params.setOwner(& item_val);
00152          lOffsetOld = params.offset(); params.setOffset(lOffsetRelation++);
00153          while ((pRelation = this->nextRelation(lRelation)))
00154          { if (this->addLazyRelation(params, pRelation)) { pRelation->lazyFetch_ResolveOutput(params); } }
00155          params.setOwner(pOwnerOld); params.setOffset(lOffsetOld);
00156          params.setIndexOwner(lIndexOwnerOld);
00157       }
00158 
00159       if (! this->callTriggerAfterFetch(item_val, params)) { return NULL; }
00160       type_value * pValue = type_generic_container::insertItem(this->getContainer(params), item);
00161       if (! type_item::is_value_pointer && pValue) { return pValue; }
00162       return (& item_val);
00163    }
00164 
00165 private:
00166 
00167    void forceParentIdToAllChildren(QxSqlRelationParams & params) const
00168    {
00169       bool bForce = qx::QxSqlDatabase::getSingleton()->getForceParentIdToAllChildren();
00170       if (! bForce || ! params.owner()) { return; }
00171       IxDataMember * pIdOwner = this->getDataIdOwner(); if (! pIdOwner) { return; }
00172       IxDataMember * pForeign = this->getDataByKey(this->getForeignKey()); if (! pForeign) { return; }
00173       if (pIdOwner->getNameCount() != pForeign->getNameCount()) { return; }
00174 
00175       QList<QVariant> vIdOwner;
00176       for (int i = 0; i < pIdOwner->getNameCount(); i++)
00177       { vIdOwner.append(pIdOwner->toVariant(params.owner(), i, qx::cvt::context::e_database)); }
00178 
00179       type_item item;
00180       type_container & container = this->getContainer(params);
00181       type_iterator itr = type_generic_container::begin(container, item);
00182       type_iterator itr_end = type_generic_container::end(container);
00183 
00184       while (itr != itr_end)
00185       {
00186          type_data & item_val = item.value_qx();
00187          for (int i = 0; i < vIdOwner.count(); i++)
00188          { pForeign->fromVariant((& item_val), vIdOwner.at(i), "", i, qx::cvt::context::e_database); }
00189          itr = type_generic_container::next(container, itr, item);
00190       }
00191    }
00192 
00193 };
00194 
00195 } // namespace qx
00196 
00197 #endif // _QX_SQL_RELATION_ONE_TO_MANY_H_