?? ogr_attrind.h
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/******************************************************************************
* $Id: ogr_attrind.h 10646 2007-01-18 02:38:10Z warmerdam $
*
* Project: OpenGIS Simple Features Reference Implementation
* Purpose: Classes related to generic implementation of attribute indexing.
* Author: Frank Warmerdam, warmerdam@pobox.com
*
******************************************************************************
* Copyright (c) 2003, Frank Warmerdam <warmerdam@pobox.com>
*
* 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_ATTRIND_H_INCLUDED
#define _OGR_ATTRIND_H_INCLUDED
#include "ogrsf_frmts.h"
/************************************************************************/
/* OGRAttrIndex */
/* */
/* Base class for accessing the indexing info about one field. */
/************************************************************************/
class CPL_DLL OGRAttrIndex
{
protected:
OGRAttrIndex();
public:
virtual ~OGRAttrIndex();
virtual long GetFirstMatch( OGRField *psKey ) = 0;
virtual long *GetAllMatches( OGRField *psKey ) = 0;
virtual OGRErr AddEntry( OGRField *psKey, long nFID ) = 0;
virtual OGRErr RemoveEntry( OGRField *psKey, long nFID ) = 0;
virtual OGRErr Clear() = 0;
};
/************************************************************************/
/* OGRLayerAttrIndex */
/* */
/* Base class representing attribute indexes for all indexed */
/* fields in a layer. */
/************************************************************************/
class CPL_DLL OGRLayerAttrIndex
{
protected:
OGRLayer *poLayer;
char *pszIndexPath;
OGRLayerAttrIndex();
public:
virtual ~OGRLayerAttrIndex();
virtual OGRErr Initialize( const char *pszIndexPath, OGRLayer * ) = 0;
virtual OGRErr CreateIndex( int iField ) = 0;
virtual OGRErr DropIndex( int iField ) = 0;
virtual OGRErr IndexAllFeatures( int iField = -1 ) = 0;
virtual OGRErr AddToIndex( OGRFeature *poFeature, int iField = -1 ) = 0;
virtual OGRErr RemoveFromIndex( OGRFeature *poFeature ) = 0;
virtual OGRAttrIndex *GetFieldIndex( int iField ) = 0;
};
OGRLayerAttrIndex CPL_DLL *OGRCreateDefaultLayerIndex();
#endif /* ndef _OGR_ATTRIND_H_INCLUDED */
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