?? ogr_gensql.h
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/****************************************************************************** * $Id: ogr_gensql.h 10646 2007-01-18 02:38:10Z warmerdam $ * * Project: OpenGIS Simple Features Reference Implementation * Purpose: Classes related to generic implementation of ExecuteSQL(). * Author: Frank Warmerdam, warmerdam@pobox.com * ****************************************************************************** * Copyright (c) 2002, Frank Warmerdam * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. ****************************************************************************/#ifndef _OGR_GENSQL_H_INCLUDED#define _OGR_GENSQL_H_INCLUDED#include "ogrsf_frmts.h"/************************************************************************//* OGRGenSQLResultsLayer *//************************************************************************/class CPL_DLL OGRGenSQLResultsLayer : public OGRLayer{ private: OGRDataSource *poSrcDS; OGRLayer *poSrcLayer; void *pSelectInfo; OGRLayer **papoTableLayers; OGRFeatureDefn *poDefn; int PrepareSummary(); int nIndexSize; long *panFIDIndex; int nNextIndexFID; OGRFeature *poSummaryFeature; int iFIDFieldIndex; OGRField *pasOrderByIndex; int nExtraDSCount; OGRDataSource **papoExtraDS; OGRFeature *TranslateFeature( OGRFeature * ); void CreateOrderByIndex(); void SortIndexSection( OGRField *pasIndexFields, int nStart, int nEntries ); int Compare( OGRField *pasFirst, OGRField *pasSecond ); void ClearFilters(); public: OGRGenSQLResultsLayer( OGRDataSource *poSrcDS, void *pSelectInfo, OGRGeometry *poSpatFilter ); virtual ~OGRGenSQLResultsLayer(); virtual OGRGeometry *GetSpatialFilter(); virtual void ResetReading(); virtual OGRFeature *GetNextFeature(); virtual OGRErr SetNextByIndex( long nIndex ); virtual OGRFeature *GetFeature( long nFID ); virtual OGRFeatureDefn *GetLayerDefn(); virtual OGRSpatialReference *GetSpatialRef(); virtual int GetFeatureCount( int bForce = TRUE ); virtual OGRErr GetExtent(OGREnvelope *psExtent, int bForce = TRUE); virtual int TestCapability( const char * );};#endif /* ndef _OGR_GENSQL_H_INCLUDED */
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