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qgsoraclefeatureiterator.h
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qgsoraclefeatureiterator.h
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/***************************************************************************
qgsoraclefeatureiterator.h - QGIS data provider for Oracle layers
-------------------
begin : December 2012
copyright : (C) 2012 by Juergen E. Fischer
email : jef at norbit dot de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef QGSORACLEFEATUREITERATOR_H
#define QGSORACLEFEATUREITERATOR_H
#include "qgsfeatureiterator.h"
#include <QSqlQuery>
#include "qgsoracleprovider.h"
class QgsOracleConn;
class QgsOracleProvider;
class QgsOracleFeatureSource : public QgsAbstractFeatureSource
{
public:
QgsOracleFeatureSource( const QgsOracleProvider* p );
virtual QgsFeatureIterator getFeatures( const QgsFeatureRequest& request );
protected:
QgsDataSourceURI mUri;
QgsFields mFields;
QString mGeometryColumn; //! name of the geometry column
int mSrid; //! srid of column
bool mHasSpatialIndex; //! has spatial index of geometry column
QGis::WkbType mDetectedGeomType; //! geometry type detected in the database
QGis::WkbType mRequestedGeomType; //! geometry type requested in the uri
QString mSqlWhereClause;
QgsOraclePrimaryKeyType mPrimaryKeyType;
QList<int> mPrimaryKeyAttrs;
QString mQuery;
QSharedPointer<QgsOracleSharedData> mShared;
friend class QgsOracleFeatureIterator;
};
class QgsOracleFeatureIterator : public QgsAbstractFeatureIteratorFromSource<QgsOracleFeatureSource>
{
public:
QgsOracleFeatureIterator( QgsOracleFeatureSource* source, bool ownSource, const QgsFeatureRequest &request );
~QgsOracleFeatureIterator();
//! reset the iterator to the starting position
virtual bool rewind();
//! end of iterating: free the resources / lock
virtual bool close();
protected:
//! fetch next feature, return true on success
virtual bool fetchFeature( QgsFeature& feature );
bool openQuery( QString whereClause );
QgsOracleConn *mConnection;
QSqlQuery mQry;
bool mRewind;
QgsAttributeList mAttributeList;
};
#endif // QGSORACLEFEATUREITERATOR_H