ogr_csv.h

GIS系统支持库Geospatial Data Abstraction Library代码.GDAL is a translator library for raster geospatial dat

/******************************************************************************
 * $Id: ogr_csv.h,v 1.6 2005/02/22 12:55:18 fwarmerdam Exp $
 *
 * Project:  CSV Translator
 * Purpose:  Definition of classes for OGR .csv driver.
 * Author:   Frank Warmerdam, [e-mail]
 *
 ******************************************************************************
 * Copyright (c) 2004,  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.
 ******************************************************************************
 *
 * $Log: ogr_csv.h,v $
 * Revision 1.6  2005/02/22 12:55:18  fwarmerdam
 * use OGRLayer base spatial filter support
 *
 * Revision 1.5  2004/08/17 15:40:40  warmerda
 * track capabilities and update mode better
 *
 * Revision 1.4  2004/08/16 21:29:48  warmerda
 * added output support
 *
 * Revision 1.3  2004/07/31 04:50:22  warmerda
 * started write support
 *
 * Revision 1.2  2004/07/20 20:53:26  warmerda
 * added support for reading directories of CSV files
 *
 * Revision 1.1  2004/07/20 19:18:23  warmerda
 * New
 *
 */

#ifndef _OGR_CSV_H_INCLUDED
#define _OGR_CSV_H_INLLUDED

#include "ogrsf_frmts.h"

class OGRCSVDataSource;

/************************************************************************/
/*                             OGRCSVLayer                              */
/************************************************************************/

class OGRCSVLayer : public OGRLayer
{
    OGRFeatureDefn     *poFeatureDefn;

    FILE               *fpCSV;

    int                 nNextFID;

    int                 bHasFieldNames;

    OGRFeature *        GetNextUnfilteredFeature();

    int                 bNew;
    int                 bInWriteMode;
    int                 bUseCRLF;
    int                 bNeedRewind;

  public:
                        OGRCSVLayer( const char *pszName, FILE *fp, 
                                     int bNew, int bInWriteMode );
                        ~OGRCSVLayer();

    void                ResetReading();
    OGRFeature *        GetNextFeature();

    OGRFeatureDefn *    GetLayerDefn() { return poFeatureDefn; }

    void                SetSpatialFilter( OGRGeometry * ) {}

    int                 TestCapability( const char * );

    virtual OGRErr      CreateField( OGRFieldDefn *poField,
                                     int bApproxOK = TRUE );

    virtual OGRErr      CreateFeature( OGRFeature *poFeature );

    void                SetCRLF(int);
};

/************************************************************************/
/*                           OGRCSVDataSource                           */
/************************************************************************/

class OGRCSVDataSource : public OGRDataSource
{
    char                *pszName;

    OGRCSVLayer       **papoLayers;
    int                 nLayers;

    int                 bUpdate;
    
  public:
                        OGRCSVDataSource();
                        ~OGRCSVDataSource();

    int                 Open( const char * pszFilename,
                              int bUpdate, int bForceAccept );
    int                 OpenTable( const char * pszFilename );
    
    const char          *GetName() { return pszName; }

    int                 GetLayerCount() { return nLayers; }
    OGRLayer            *GetLayer( int );

    virtual OGRLayer   *CreateLayer( const char *pszName, 
                                     OGRSpatialReference *poSpatialRef = NULL,
                                     OGRwkbGeometryType eGType = wkbUnknown,
                                     char ** papszOptions = NULL );

    virtual OGRErr      DeleteLayer(int);

    int                 TestCapability( const char * );
};

/************************************************************************/
/*                             OGRCSVDriver                             */
/************************************************************************/

class OGRCSVDriver : public OGRSFDriver
{
  public:
                ~OGRCSVDriver();
                
    const char *GetName();
    OGRDataSource *Open( const char *, int );
    OGRDataSource *CreateDataSource( const char *, char ** );
    int         TestCapability( const char * );

    virtual OGRErr      DeleteDataSource( const char *pszName );
    
};


#endif /* ndef _OGR_CSV_H_INCLUDED */