QxOrm 1.1.9
C++ Object Relational Mapping library
QxSqlRelation_ManyToOne.h
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00003 ** http://www.qxorm.com/
00004 ** http://sourceforge.net/projects/qxorm/
00005 ** Original file by Lionel Marty
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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 QString getDescription() const                                     { return "relation many-to-one"; }
00063    virtual bool getCartesianProduct() const                                   { return false; }
00064    virtual void lazyFrom(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00065    virtual void eagerFrom(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00066    virtual void lazyJoin(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00067    virtual void lazyWhere(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00068    virtual void eagerWhere(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00069    virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const       { Q_UNUSED(params); }
00070    virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
00071    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00072    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const         { Q_UNUSED(params); return QSqlError(); }
00073    virtual QSqlError createExtraTable(QxSqlRelationParams & params) const     { Q_UNUSED(params); return QSqlError(); }
00074 
00075    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
00076    { return qx::dao::save(this->getData(params), (& params.database())); }
00077 
00078    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const
00079    { this->lazyInsert_ResolveInput(params); }
00080 
00081    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
00082    {
00083       Q_UNUSED(bEager); QString sId; IxDataMember * pId = this->getDataId(); if (! pId) { return QVariant(); }
00084       for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; }
00085       return QVariant(sId);
00086    }
00087 
00088    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
00089    {
00090       long lOffsetDataMember = (this->getDataMember() ? this->getDataMember()->getNameCount() : 0);
00091       long lOffsetDataId = (bEager ? (this->getDataId() ? this->getDataId()->getNameCount() : 0) : 0);
00092       long lOffsetDataCount = (bEager ? this->getDataCount() : 0);
00093       long lOffsetSoftDelete = (bEager ? (this->m_oSoftDelete.isEmpty() ? 0 : 1) : 0);
00094       params.setOffset(params.offset() + lOffsetDataMember + lOffsetDataId + lOffsetDataCount + lOffsetSoftDelete);
00095    }
00096 
00097    virtual void createTable(QxSqlRelationParams & params) const
00098    {
00099       QString & sql = params.sql();
00100       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00101       if (pData) { sql += pData->getSqlNameAndTypeAndParams(", ") + ", "; qAssert(! pData->getSqlType().isEmpty()); }
00102    }
00103 
00104    virtual void lazySelect(QxSqlRelationParams & params) const
00105    {
00106       QString & sql = params.sql();
00107       QString tableRef = params.builder().table();
00108       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00109       if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); }
00110    }
00111 
00112    virtual void eagerSelect(QxSqlRelationParams & params) const
00113    {
00114       long l1(0);
00115       QString & sql = params.sql();
00116       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00117       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId);
00118       QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table();
00119       if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); }
00120       if (pId) { sql += (pId->getSqlTablePointNameAsAlias(tableAlias) + ", "); }
00121       while ((p = this->nextData(l1))) { sql += (p->getSqlTablePointNameAsAlias(tableAlias) + ", "); }
00122       if (! this->m_oSoftDelete.isEmpty()) { sql += (this->m_oSoftDelete.buildSqlTablePointName(tableAlias) + ", "); }
00123    }
00124 
00125    virtual void eagerJoin(QxSqlRelationParams & params) const
00126    {
00127       QString & sql = params.sql();
00128       IxDataMember * pId = this->getDataId(); qAssert(pId);
00129       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00130       QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table();
00131       if (! pId || ! pData) { return; }
00132       sql += this->getSqlJoin() + table + " " + tableAlias + " ON ";
00133       for (int i = 0; i < pId->getNameCount(); i++)
00134       { sql += pId->getSqlAlias(tableAlias, true, i) + " = " + pData->getSqlAlias(tableRef, true, i) + " AND "; }
00135       sql = sql.left(sql.count() - 5); // Remove last " AND "
00136    }
00137 
00138    virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
00139    {
00140       if (this->m_oSoftDelete.isEmpty()) { return; }
00141       QString & sql = params.sql();
00142       QString tableAlias = this->tableAlias(params);
00143       sql += qx::IxSqlQueryBuilder::addSqlCondition(sql);
00144       sql += this->m_oSoftDelete.buildSqlQueryToFetch(tableAlias);
00145    }
00146 
00147    virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const
00148    {
00149       if (! this->verifyOffset(params, false)) { return; }
00150       QSqlQuery & query = params.query();
00151       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00152       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00153       for (int i = 0; i < pData->getNameCount(); i++)
00154       { QVariant vId = query.value(params.offset() + i); pData->fromVariant((& currOwner), vId, i); }
00155       this->updateOffset(false, params);
00156    }
00157 
00158    virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
00159    {
00160       if (! this->verifyOffset(params, false)) { return; }
00161       QSqlQuery & query = params.query();
00162       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00163       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00164       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; }
00165       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetData = (pData ? pData->getNameCount() : 0);
00166       long lOffsetOld = params.offset(); this->updateOffset(true, params);
00167       long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetData);
00168       bool bValidId(false), bValidIdBis(false);
00169       for (int i = 0; i < pData->getNameCount(); i++)
00170       { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
00171       for (int i = 0; i < pId->getNameCount(); i++)
00172       { QVariant vIdBis = query.value(lOffsetOld + lOffsetData + i); bValidIdBis = (bValidIdBis || qx::trait::is_valid_primary_key(vIdBis)); }
00173       if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(lOffsetOld + i), i); } }
00174       if (! bValidIdBis) { return; }
00175       type_data & currData = this->getData(params);
00176       if (pId) { for (int i = 0; i < pId->getNameCount(); i++) { pId->fromVariant((& currData), query.value(lOffsetOld + lOffsetData + i), i); } }
00177       while ((p = this->nextData(lIndex)))
00178       { p->fromVariant((& currData), query.value(lOffsetRelation++)); }
00179    }
00180 
00181    virtual void lazyInsert(QxSqlRelationParams & params) const
00182    {
00183       QString & sql = params.sql();
00184       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00185       if (pData) { sql += pData->getSqlName(", ") + ", "; }
00186    }
00187 
00188    virtual void lazyInsert_Values(QxSqlRelationParams & params) const
00189    {
00190       QString & sql = params.sql();
00191       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00192       if (pData) { sql += pData->getSqlPlaceHolder("", -1, ", ") + ", "; }
00193    }
00194 
00195    virtual void lazyUpdate(QxSqlRelationParams & params) const
00196    {
00197       QString & sql = params.sql();
00198       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00199       if (pData) { sql += pData->getSqlNameEqualToPlaceHolder("", ", ") + ", "; }
00200    }
00201 
00202    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const
00203    {
00204       QSqlQuery & query = params.query();
00205       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00206       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00207       if (pData) { pData->setSqlPlaceHolder(query, (& currOwner)); }
00208    }
00209 
00210 };
00211 
00212 } // namespace qx
00213 
00214 #endif // _QX_SQL_RELATION_MANY_TO_ONE_H_
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