QxOrm  1.2.3
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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00013 ** GNU Lesser General Public License Usage
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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 QString getExtraTable() const                                      { return ""; }
00064    virtual QString createExtraTable() const                                   { return ""; }
00065    virtual bool getCartesianProduct() const                                   { return false; }
00066    virtual void lazyFrom(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00067    virtual void eagerFrom(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00068    virtual void lazyJoin(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
00069    virtual void lazyWhere(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
00070    virtual void eagerWhere(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
00071    virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const       { Q_UNUSED(params); }
00072    virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
00073    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
00074    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const         { Q_UNUSED(params); return QSqlError(); }
00075 
00076    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
00077    { return qx::dao::save(this->getData(params), (& params.database())); }
00078 
00079    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const
00080    { this->lazyInsert_ResolveInput(params); }
00081 
00082    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
00083    {
00084       Q_UNUSED(bEager); QString sId; IxDataMember * pId = this->getDataId(); if (! pId) { return QVariant(); }
00085       for (int i = 0; i < pId->getNameCount(); i++) { sId += params.query().value(params.offset() + i).toString() + "|"; }
00086       return QVariant(sId);
00087    }
00088 
00089    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
00090    {
00091       long lOffsetDataMember = (this->getDataMember() ? this->getDataMember()->getNameCount() : 0);
00092       long lOffsetDataId = (bEager ? (this->getDataId() ? this->getDataId()->getNameCount() : 0) : 0);
00093       long lOffsetDataCount = (bEager ? this->getDataCount() : 0);
00094       long lOffsetSoftDelete = (bEager ? (this->m_oSoftDelete.isEmpty() ? 0 : 1) : 0);
00095       params.setOffset(params.offset() + lOffsetDataMember + lOffsetDataId + lOffsetDataCount + lOffsetSoftDelete);
00096    }
00097 
00098    virtual void createTable(QxSqlRelationParams & params) const
00099    {
00100       QString & sql = params.sql();
00101       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00102       if (pData) { sql += pData->getSqlNameAndTypeAndParams(", ") + ", "; qAssert(! pData->getSqlType().isEmpty()); }
00103    }
00104 
00105    virtual void lazySelect(QxSqlRelationParams & params) const
00106    {
00107       QString & sql = params.sql();
00108       QString tableRef = params.builder().table();
00109       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00110       if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); }
00111    }
00112 
00113    virtual void eagerSelect(QxSqlRelationParams & params) const
00114    {
00115       long l1(0);
00116       QString & sql = params.sql();
00117       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00118       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId);
00119       QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table();
00120       if (pData) { sql += (pData->getSqlTablePointNameAsAlias(tableRef) + ", "); }
00121       if (pId) { sql += (pId->getSqlTablePointNameAsAlias(tableAlias) + ", "); }
00122       while ((p = this->nextData(l1))) { sql += (p->getSqlTablePointNameAsAlias(tableAlias) + ", "); }
00123       if (! this->m_oSoftDelete.isEmpty()) { sql += (this->m_oSoftDelete.buildSqlTablePointName(tableAlias) + ", "); }
00124    }
00125 
00126    virtual void eagerJoin(QxSqlRelationParams & params) const
00127    {
00128       QString & sql = params.sql();
00129       IxDataMember * pId = this->getDataId(); qAssert(pId);
00130       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00131       QString table = this->table(); QString tableAlias = this->tableAlias(params); QString tableRef = params.builder().table();
00132       if (! pId || ! pData) { return; }
00133       sql += this->getSqlJoin() + table + " " + tableAlias + " ON ";
00134       params.builder().addSqlQueryAlias(table, tableAlias);
00135       for (int i = 0; i < pId->getNameCount(); i++)
00136       { sql += pId->getSqlAlias(tableAlias, true, i) + " = " + pData->getSqlAlias(tableRef, true, i) + " AND "; }
00137       sql = sql.left(sql.count() - 5); // Remove last " AND "
00138    }
00139 
00140    virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
00141    {
00142       if (this->m_oSoftDelete.isEmpty()) { return; }
00143       QString & sql = params.sql();
00144       QString tableAlias = this->tableAlias(params);
00145       sql += qx::IxSqlQueryBuilder::addSqlCondition(sql);
00146       sql += this->m_oSoftDelete.buildSqlQueryToFetch(tableAlias);
00147    }
00148 
00149    virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const
00150    {
00151       if (! this->verifyOffset(params, false)) { return; }
00152       QSqlQuery & query = params.query();
00153       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00154       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00155       for (int i = 0; i < pData->getNameCount(); i++)
00156       { QVariant vId = query.value(params.offset() + i); pData->fromVariant((& currOwner), vId, i); }
00157       this->updateOffset(false, params);
00158    }
00159 
00160    virtual void eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
00161    {
00162       if (! this->verifyOffset(params, false)) { return; }
00163       QSqlQuery & query = params.query();
00164       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00165       IxDataMember * pData = this->getDataMember(); qAssert(pData); if (! pData) { return; }
00166       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return; }
00167       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetData = (pData ? pData->getNameCount() : 0);
00168       long lOffsetOld = params.offset(); this->updateOffset(true, params);
00169       long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetData);
00170       bool bValidId(false), bValidIdBis(false);
00171       for (int i = 0; i < pData->getNameCount(); i++)
00172       { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
00173       for (int i = 0; i < pId->getNameCount(); i++)
00174       { QVariant vIdBis = query.value(lOffsetOld + lOffsetData + i); bValidIdBis = (bValidIdBis || qx::trait::is_valid_primary_key(vIdBis)); }
00175       if (pData && bValidId) { for (int i = 0; i < pData->getNameCount(); i++) { pData->fromVariant((& currOwner), query.value(lOffsetOld + i), i); } }
00176       if (! bValidIdBis) { return; }
00177       type_data & currData = this->getData(params);
00178       if (pId) { for (int i = 0; i < pId->getNameCount(); i++) { pId->fromVariant((& currData), query.value(lOffsetOld + lOffsetData + i), i); } }
00179       while ((p = this->nextData(lIndex)))
00180       { p->fromVariant((& currData), query.value(lOffsetRelation++)); }
00181    }
00182 
00183    virtual void lazyInsert(QxSqlRelationParams & params) const
00184    {
00185       QString & sql = params.sql();
00186       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00187       if (pData) { sql += pData->getSqlName(", ") + ", "; }
00188    }
00189 
00190    virtual void lazyInsert_Values(QxSqlRelationParams & params) const
00191    {
00192       QString & sql = params.sql();
00193       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00194       if (pData) { sql += pData->getSqlPlaceHolder("", -1, ", ") + ", "; }
00195    }
00196 
00197    virtual void lazyUpdate(QxSqlRelationParams & params) const
00198    {
00199       QString & sql = params.sql();
00200       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00201       if (pData) { sql += pData->getSqlNameEqualToPlaceHolder("", ", ") + ", "; }
00202    }
00203 
00204    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const
00205    {
00206       QSqlQuery & query = params.query();
00207       typename QxSqlRelation<DataType, Owner>::type_owner & currOwner = this->getOwner(params);
00208       IxDataMember * pData = this->getDataMember(); qAssert(pData);
00209       if (pData) { pData->setSqlPlaceHolder(query, (& currOwner)); }
00210    }
00211 
00212 };
00213 
00214 } // namespace qx
00215 
00216 #endif // _QX_SQL_RELATION_MANY_TO_ONE_H_