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QxSqlRelation_OneToMany.h
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    00001 /****************************************************************************
    00002 **
    00003 ** http://www.qxorm.com/
    00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
    00005 **
    00006 ** This file is part of the QxOrm library
    00007 **
    00008 ** This software is provided 'as-is', without any express or implied
    00009 ** warranty. In no event will the authors be held liable for any
    00010 ** damages arising from the use of this software
    00011 **
    00012 ** Commercial Usage
    00013 ** Licensees holding valid commercial QxOrm licenses may use this file in
    00014 ** accordance with the commercial license agreement provided with the
    00015 ** Software or, alternatively, in accordance with the terms contained in
    00016 ** a written agreement between you and Lionel Marty
    00017 **
    00018 ** GNU General Public License Usage
    00019 ** Alternatively, this file may be used under the terms of the GNU
    00020 ** General Public License version 3.0 as published by the Free Software
    00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the
    00022 ** packaging of this file. Please review the following information to
    00023 ** ensure the GNU General Public License version 3.0 requirements will be
    00024 ** met : http://www.gnu.org/copyleft/gpl.html
    00025 **
    00026 ** If you are unsure which license is appropriate for your use, or
    00027 ** if you have questions regarding the use of this file, please contact :
    00028 ** contact@qxorm.com
    00029 **
    00030 ****************************************************************************/
    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
    00066    enum { is_data_container = QxSqlRelation<DataType, Owner>::is_data_container };
    00067
    00068 public:
    00069
    00070    QxSqlRelation_OneToMany(IxDataMember * p, const QString & sForeignKey) : QxSqlRelation<DataType, Owner>(p) { this->m_eRelationType = qx::IxSqlRelation::one_to_many; this->m_sForeignKey = sForeignKey; qAssert(! this->m_sForeignKey.isEmpty()); }
    00071    virtual ~QxSqlRelation_OneToMany() { BOOST_STATIC_ASSERT(is_data_container); }
    00072
    00073    virtual QString getDescription() const                                     { return "relation one-to-many"; }
    00074    virtual QString getExtraTable() const                                      { return ""; }
    00075    virtual QString createExtraTable() const                                   { return ""; }
    00076    virtual bool getCartesianProduct() const                                   { return true; }
    00077    virtual void createTable(QxSqlRelationParams & params) const               { Q_UNUSED(params); }
    00078    virtual void lazySelect(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
    00079    virtual void lazyFrom(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
    00080    virtual void eagerFrom(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
    00081    virtual void lazyJoin(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
    00082    virtual void lazyWhere(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
    00083    virtual void eagerWhere(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
    00084    virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const       { Q_UNUSED(params); }
    00085    virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
    00086    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
    00087    virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
    00088    virtual void lazyInsert(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
    00089    virtual void lazyInsert_Values(QxSqlRelationParams & params) const         { Q_UNUSED(params); }
    00090    virtual void lazyUpdate(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
    00091    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
    00092    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
    00093    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const         { Q_UNUSED(params); return QSqlError(); }
    00094
    00095    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
    00096    {
    00097       if (this->isNullData(params)) { return QSqlError(); }
    00098       return qx::dao::save(this->getContainer(params), (& params.database()));
    00099    }
    00100
    00101    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
    00102    { return this->getIdFromQuery_OneToMany(bEager, params); }
    00103
    00104    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
    00105    { this->updateOffset_OneToMany(bEager, params); }
    00106
    00107    virtual void eagerSelect(QxSqlRelationParams & params) const
    00108    { this->eagerSelect_OneToMany(params); }
    00109
    00110    virtual void eagerJoin(QxSqlRelationParams & params) const
    00111    { this->eagerJoin_OneToMany(params); }
    00112
    00113    virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
    00114    { this->eagerWhereSoftDelete_OneToMany(params); }
    00115
    00116    virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
    00117    {
    00118       if (! this->verifyOffset(params, true)) { return NULL; }
    00119       QSqlQuery & query = params.query();
    00120       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return NULL; }
    00121       IxDataMember * pForeign = this->getDataByKey(this->m_sForeignKey); qAssert(pForeign); if (! pForeign) { return NULL; }
    00122       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetForeign = (pForeign ? pForeign->getNameCount() : 0);
    00123       long lOffsetOld = params.offset(); this->updateOffset(true, params);
    00124       long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetForeign);
    00125       long lRelation = 0; IxSqlRelation * pRelation = NULL;
    00126       bool bValidId(false), bValidForeign(false);
    00127       for (int i = 0; i < pId->getNameCount(); i++)
    00128       { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
    00129       for (int i = 0; i < pForeign->getNameCount(); i++)
    00130       { QVariant vForeign = query.value(lOffsetOld + lOffsetId + i); bValidForeign = (bValidForeign || qx::trait::is_valid_primary_key(vForeign)); }
    00131       if (! bValidId || ! bValidForeign) { return NULL; }
    00132       type_item item = this->createItem();
    00133       type_data & item_val = item.value_qx();
    00134       if (! this->callTriggerBeforeFetch(item_val, params)) { return NULL; }
    00135       for (int i = 0; i < pId->getNameCount(); i++)
    00136       { QVariant v = query.value(lOffsetOld + i); qx::cvt::from_variant(v, item.key(), "", i); }
    00137       for (int i = 0; i < pId->getNameCount(); i++)
    00138       { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& item_val), v, "", i); }
    00139       for (int i = 0; i < pForeign->getNameCount(); i++)
    00140       { QVariant v = query.value(lOffsetOld + lOffsetId + i); pForeign->fromVariant((& item_val), v, "", i); }
    00141       while ((p = this->nextData(lIndex)))
    00142       { if (p != pForeign) { p->fromVariant((& item_val), query.value(lOffsetRelation++)); } }
    00143
    00144       if (params.relationX())
    00145       {
    00146          long lIndexOwnerOld = params.indexOwner(); params.setIndexOwner(params.index());
    00147          void * pOwnerOld = params.owner(); params.setOwner(& item_val);
    00148          lOffsetOld = params.offset(); params.setOffset(lOffsetRelation++);
    00149          while ((pRelation = this->nextRelation(lRelation)))
    00150          { if (this->addLazyRelation(params, pRelation)) { pRelation->lazyFetch_ResolveOutput(params); } }
    00151          params.setOwner(pOwnerOld); params.setOffset(lOffsetOld);
    00152          params.setIndexOwner(lIndexOwnerOld);
    00153       }
    00154
    00155       if (! this->callTriggerAfterFetch(item_val, params)) { return NULL; }
    00156       type_generic_container::insertItem(this->getContainer(params), item);
    00157       return (& item_val);
    00158    }
    00159
    00160 };
    00161
    00162 } // namespace qx
    00163
    00164 #endif // _QX_SQL_RELATION_ONE_TO_MANY_H_