QxOrm 1.1.6
C++ Object Relational Mapping library
QxSqlRelation_ManyToOne.h
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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 lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
00069    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00070    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const         { Q_UNUSED(params); return QSqlError(); }
00071    virtual QSqlError createExtraTable(QxSqlRelationParams & params) const     { Q_UNUSED(params); return QSqlError(); }
00072 
00073    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
00074    { return qx::dao::save(this->getData(params), (& params.database())); }
00075 
00076    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const
00077    { this->lazyInsert_ResolveInput(params); }
00078 
00079    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
00080    {
00081       Q_UNUSED(bEager); QString sId; IxDataMember * pId = this->getDataId(); if (! pId) { return QVariant(); }
00082       for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; }
00083       return QVariant(sId);
00084    }
00085 
00086    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
00087    {
00088       long lOffsetDataMember = (this->getDataMember() ? this->getDataMember()->getNameCount() : 0);
00089       long lOffsetDataId = (bEager ? (this->getDataCount() + (this->getDataId() ? this->getDataId()->getNameCount() : 0)) : 0);
00090       params.setOffset(params.offset() + lOffsetDataMember + lOffsetDataId);
00091    }
00092 
00093    virtual void createTable(QxSqlRelationParams & params) const
00094    {
00095       QString & sql = params.sql();
00096       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00097       if (pData) { sql += pData->getSqlNameAndTypeAndParams(", ") + ", "; qAssert(! pData->getSqlType().isEmpty()); }
00098    }
00099 
00100    virtual void lazySelect(QxSqlRelationParams & params) const
00101    {
00102       QString & sql = params.sql();
00103       QString tableRef = params.builder().table();
00104       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00105       if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); }
00106    }
00107 
00108    virtual void eagerSelect(QxSqlRelationParams & params) const
00109    {
00110       long l1(0);
00111       QString & sql = params.sql();
00112       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00113       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId);
00114       //IxSqlRelation * pRelation = NULL;
00115       //QxSqlQueryBuilder<DataType> builderBis;
00116       //QxSqlRelationParams paramsBis(0, 0, (& sql), (& builderBis), NULL, NULL);
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       //while ((pRelation = this->nextRelation(l2))) { params.setIndex(m_lOffsetRelation + l2); pRelation->lazySelect(paramsBis); }
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 lazyFetch_ResolveOutput(QxSqlRelationParams & params) const
00138    {
00139       if (! this->verifyOffset(params, false)) { return; }
00140       QSqlQuery & query = params.query();
00141       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00142       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00143       for (int i = 0; i < pData->getNameCount(); i++)
00144       { QVariant vId = query.value(params.offset() + i); pData->fromVariant((& currOwner), vId, i); }
00145       params.setOffset(params.offset() + (pData ? pData->getNameCount() : 0));
00146    }
00147 
00148    virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
00149    {
00150       if (! this->verifyOffset(params, false)) { return; }
00151       QSqlQuery & query = params.query();
00152       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00153       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00154       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; }
00155       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetData = (pData ? pData->getNameCount() : 0);
00156       long lOffsetOld = params.offset(); params.setOffset(lOffsetOld + this->getDataCount() + lOffsetId + lOffsetData);
00157       long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetData);
00158       bool bValidId(false), bValidIdBis(false);
00159       for (int i = 0; i < pData->getNameCount(); i++)
00160       { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
00161       for (int i = 0; i < pId->getNameCount(); i++)
00162       { QVariant vIdBis = query.value(lOffsetOld + lOffsetData + i); bValidIdBis = (bValidIdBis || qx::trait::is_valid_primary_key(vIdBis)); }
00163       if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(lOffsetOld + i), i); } }
00164       if (! bValidIdBis) { return; }
00165       type_data & currData = this->getData(params);
00166       if (pId) { for (int i = 0; i < pId->getNameCount(); i++) { pId->fromVariant((& currData), query.value(lOffsetOld + lOffsetData + i), i); } }
00167       while ((p = this->nextData(lIndex)))
00168       { p->fromVariant((& currData), query.value(lOffsetRelation++)); }
00169    }
00170 
00171    virtual void lazyInsert(QxSqlRelationParams & params) const
00172    {
00173       QString & sql = params.sql();
00174       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00175       if (pData) { sql += pData->getSqlName(", ") + ", "; }
00176    }
00177 
00178    virtual void lazyInsert_Values(QxSqlRelationParams & params) const
00179    {
00180       QString & sql = params.sql();
00181       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00182       if (pData) { sql += pData->getSqlPlaceHolder("", -1, ", ") + ", "; }
00183    }
00184 
00185    virtual void lazyUpdate(QxSqlRelationParams & params) const
00186    {
00187       QString & sql = params.sql();
00188       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00189       if (pData) { sql += pData->getSqlNameEqualToPlaceHolder("", ", ") + ", "; }
00190    }
00191 
00192    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const
00193    {
00194       QSqlQuery & query = params.query();
00195       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00196       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00197       if (pData) { pData->setSqlPlaceHolder(query, (& currOwner)); }
00198    }
00199 
00200 };
00201 
00202 } // namespace qx
00203 
00204 #endif // _QX_SQL_RELATION_MANY_TO_ONE_H_
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