QxOrm 1.1.8
C++ Object Relational Mapping library
QxSqlRelation_ManyToOne.h
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00003 ** http://www.qxorm.com/
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00025 
00026 #ifndef _QX_SQL_RELATION_MANY_TO_ONE_H_
00027 #define _QX_SQL_RELATION_MANY_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_ManyToOne : 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_ManyToOne(IxDataMember * p) : QxSqlRelation<DataType, Owner>(p) { ; }
00060    virtual ~QxSqlRelation_ManyToOne() { ; }
00061 
00062    virtual bool getCartesianProduct() const                                   { return false; }
00063    virtual void lazyFrom(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00064    virtual void eagerFrom(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00065    virtual void lazyJoin(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00066    virtual void lazyWhere(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00067    virtual void eagerWhere(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00068    virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const       { Q_UNUSED(params); }
00069    virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
00070    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00071    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const         { Q_UNUSED(params); return QSqlError(); }
00072    virtual QSqlError createExtraTable(QxSqlRelationParams & params) const     { Q_UNUSED(params); return QSqlError(); }
00073 
00074    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
00075    { return qx::dao::save(this->getData(params), (& params.database())); }
00076 
00077    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const
00078    { this->lazyInsert_ResolveInput(params); }
00079 
00080    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
00081    {
00082       Q_UNUSED(bEager); QString sId; IxDataMember * pId = this->getDataId(); if (! pId) { return QVariant(); }
00083       for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; }
00084       return QVariant(sId);
00085    }
00086 
00087    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
00088    {
00089       long lOffsetDataMember = (this->getDataMember() ? this->getDataMember()->getNameCount() : 0);
00090       long lOffsetDataId = (bEager ? (this->getDataId() ? this->getDataId()->getNameCount() : 0) : 0);
00091       long lOffsetDataCount = (bEager ? this->getDataCount() : 0);
00092       long lOffsetSoftDelete = (bEager ? (this->m_oSoftDelete.isEmpty() ? 0 : 1) : 0);
00093       params.setOffset(params.offset() + lOffsetDataMember + lOffsetDataId + lOffsetDataCount + lOffsetSoftDelete);
00094    }
00095 
00096    virtual void createTable(QxSqlRelationParams & params) const
00097    {
00098       QString & sql = params.sql();
00099       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00100       if (pData) { sql += pData->getSqlNameAndTypeAndParams(", ") + ", "; qAssert(! pData->getSqlType().isEmpty()); }
00101    }
00102 
00103    virtual void lazySelect(QxSqlRelationParams & params) const
00104    {
00105       QString & sql = params.sql();
00106       QString tableRef = params.builder().table();
00107       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00108       if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); }
00109    }
00110 
00111    virtual void eagerSelect(QxSqlRelationParams & params) const
00112    {
00113       long l1(0);
00114       QString & sql = params.sql();
00115       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00116       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId);
00117       QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table();
00118       if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); }
00119       if (pId) { sql += (pId->getSqlTablePointNameAsAlias(tableAlias) + ", "); }
00120       while ((p = this->nextData(l1))) { sql += (p->getSqlTablePointNameAsAlias(tableAlias) + ", "); }
00121       if (! this->m_oSoftDelete.isEmpty()) { sql += (this->m_oSoftDelete.buildSqlTablePointName(tableAlias) + ", "); }
00122    }
00123 
00124    virtual void eagerJoin(QxSqlRelationParams & params) const
00125    {
00126       QString & sql = params.sql();
00127       IxDataMember * pId = this->getDataId(); qAssert(pId);
00128       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00129       QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table();
00130       if (! pId || ! pData) { return; }
00131       sql += this->getSqlJoin() + table + " " + tableAlias + " ON ";
00132       for (int i = 0; i < pId->getNameCount(); i++)
00133       { sql += pId->getSqlAlias(tableAlias, true, i) + " = " + pData->getSqlAlias(tableRef, true, i) + " AND "; }
00134       sql = sql.left(sql.count() - 5); // Remove last " AND "
00135    }
00136 
00137    virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
00138    {
00139       if (this->m_oSoftDelete.isEmpty()) { return; }
00140       QString & sql = params.sql();
00141       QString tableAlias = this->tableAlias(params);
00142       sql += qx::IxSqlQueryBuilder::addSqlCondition(sql);
00143       sql += this->m_oSoftDelete.buildSqlQueryToFetch(tableAlias);
00144    }
00145 
00146    virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const
00147    {
00148       if (! this->verifyOffset(params, false)) { return; }
00149       QSqlQuery & query = params.query();
00150       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00151       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00152       for (int i = 0; i < pData->getNameCount(); i++)
00153       { QVariant vId = query.value(params.offset() + i); pData->fromVariant((& currOwner), vId, i); }
00154       this->updateOffset(false, params);
00155    }
00156 
00157    virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
00158    {
00159       if (! this->verifyOffset(params, false)) { return; }
00160       QSqlQuery & query = params.query();
00161       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00162       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00163       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; }
00164       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetData = (pData ? pData->getNameCount() : 0);
00165       long lOffsetOld = params.offset(); this->updateOffset(true, params);
00166       long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetData);
00167       bool bValidId(false), bValidIdBis(false);
00168       for (int i = 0; i < pData->getNameCount(); i++)
00169       { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
00170       for (int i = 0; i < pId->getNameCount(); i++)
00171       { QVariant vIdBis = query.value(lOffsetOld + lOffsetData + i); bValidIdBis = (bValidIdBis || qx::trait::is_valid_primary_key(vIdBis)); }
00172       if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(lOffsetOld + i), i); } }
00173       if (! bValidIdBis) { return; }
00174       type_data & currData = this->getData(params);
00175       if (pId) { for (int i = 0; i < pId->getNameCount(); i++) { pId->fromVariant((& currData), query.value(lOffsetOld + lOffsetData + i), i); } }
00176       while ((p = this->nextData(lIndex)))
00177       { p->fromVariant((& currData), query.value(lOffsetRelation++)); }
00178    }
00179 
00180    virtual void lazyInsert(QxSqlRelationParams & params) const
00181    {
00182       QString & sql = params.sql();
00183       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00184       if (pData) { sql += pData->getSqlName(", ") + ", "; }
00185    }
00186 
00187    virtual void lazyInsert_Values(QxSqlRelationParams & params) const
00188    {
00189       QString & sql = params.sql();
00190       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00191       if (pData) { sql += pData->getSqlPlaceHolder("", -1, ", ") + ", "; }
00192    }
00193 
00194    virtual void lazyUpdate(QxSqlRelationParams & params) const
00195    {
00196       QString & sql = params.sql();
00197       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00198       if (pData) { sql += pData->getSqlNameEqualToPlaceHolder("", ", ") + ", "; }
00199    }
00200 
00201    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const
00202    {
00203       QSqlQuery & query = params.query();
00204       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00205       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00206       if (pData) { pData->setSqlPlaceHolder(query, (& currOwner)); }
00207    }
00208 
00209 };
00210 
00211 } // namespace qx
00212 
00213 #endif // _QX_SQL_RELATION_MANY_TO_ONE_H_
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