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# ogr_attrind.h

    00001 /******************************************************************************
    00002  * $Id: ogr_attrind.h,v 1.4 2003/12/03 15:11:05 warmerda Exp $
    00003  *
    00004  * Project:  OpenGIS Simple Features Reference Implementation
    00005  * Purpose:  Classes related to generic implementation of attribute indexing.
    00006  * Author:   Frank Warmerdam, warmerdam@pobox.com
    00007  *
    00008  ******************************************************************************
    00009  * Copyright (c) 2003, Frank Warmerdam <warmerdam@pobox.com>
    00010  *
    00011  * Permission is hereby granted, free of charge, to any person obtaining a
    00012  * copy of this software and associated documentation files (the "Software"),
    00013  * to deal in the Software without restriction, including without limitation
    00014  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
    00015  * and/or sell copies of the Software, and to permit persons to whom the
    00016  * Software is furnished to do so, subject to the following conditions:
    00017  *
    00018  * The above copyright notice and this permission notice shall be included
    00019  * in all copies or substantial portions of the Software.
    00020  *
    00021  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
    00022  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    00023  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    00024  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    00025  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    00026  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    00027  * DEALINGS IN THE SOFTWARE.
    00028  ******************************************************************************
    00029  *
    00030  * $Log: ogr_attrind.h,v $
    00031  * Revision 1.4  2003/12/03 15:11:05  warmerda
    00032  * added iField to IndexAllFeature, and default to -1
    00033  *
    00034  * Revision 1.3  2003/03/21 02:58:00  warmerda
    00035  * added drop index support
    00036  *
    00037  * Revision 1.2  2003/03/07 18:24:12  warmerda
    00038  * expand tabs
    00039  *
    00040  * Revision 1.1  2003/03/04 14:16:10  warmerda
    00041  * New
    00042  *
    00043  */
    00044
    00045 #ifndef _OGR_ATTRIND_H_INCLUDED
    00046 #define _OGR_ATTRIND_H_INCLUDED
    00047
    00048 #include "ogrsf_frmts.h"
    00049
    00050 /************************************************************************/
    00051 /*                             OGRAttrIndex                             */
    00052 /*                                                                      */
    00053 /*      Base class for accessing the indexing info about one field.     */
    00054 /************************************************************************/
    00055
    00056 class CPL_DLL OGRAttrIndex
    00057 {
    00058 protected:
    00059                 OGRAttrIndex();
    00060
    00061 public:
    00062     virtual     ~OGRAttrIndex();
    00063
    00064     virtual long   GetFirstMatch( OGRField *psKey ) = 0;
    00065     virtual long  *GetAllMatches( OGRField *psKey ) = 0;
    00066
    00067     virtual OGRErr AddEntry( OGRField *psKey, long nFID ) = 0;
    00068     virtual OGRErr RemoveEntry( OGRField *psKey, long nFID ) = 0;
    00069
    00070     virtual OGRErr Clear() = 0;
    00071 };
    00072
    00073 /************************************************************************/
    00074 /*                          OGRLayerAttrIndex                           */
    00075 /*                                                                      */
    00076 /*      Base class representing attribute indexes for all indexed       */
    00077 /*      fields in a layer.                                              */
    00078 /************************************************************************/
    00079
    00080 class CPL_DLL OGRLayerAttrIndex
    00081 {
    00082 protected:
    00083     OGRLayer    *poLayer;
    00084     char        *pszIndexPath;
    00085
    00086                 OGRLayerAttrIndex();
    00087
    00088 public:
    00089     virtual     ~OGRLayerAttrIndex();
    00090
    00091     virtual OGRErr Initialize( const char *pszIndexPath, OGRLayer * ) = 0;
    00092
    00093     virtual OGRErr CreateIndex( int iField ) = 0;
    00094     virtual OGRErr DropIndex( int iField ) = 0;
    00095     virtual OGRErr IndexAllFeatures( int iField = -1 ) = 0;
    00096
    00097     virtual OGRErr AddToIndex( OGRFeature *poFeature, int iField = -1 ) = 0;
    00098     virtual OGRErr RemoveFromIndex( OGRFeature *poFeature ) = 0;
    00099
    00100     virtual OGRAttrIndex *GetFieldIndex( int iField ) = 0;
    00101 };
    00102
    00103 OGRLayerAttrIndex CPL_DLL *OGRCreateDefaultLayerIndex();
    00104
    00105
    00106 #endif /* ndef _OGR_ATTRIND_H_INCLUDED */
    00107

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