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/******************************************************************************
* $Id $
*
* Project: GeoRSS Translator
* Purpose: Definition of classes for OGR GeoRSS driver.
* Author: Even Rouault, even dot rouault at mines dash paris dot org
*
******************************************************************************
* Copyright (c) 2008, Even Rouault
*
* 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_GEORSS_H_INCLUDED
#define _OGR_GEORSS_H_INCLUDED
#include "ogrsf_frmts.h"
#include "ogr_p.h"
#include "cpl_hash_set.h"
#ifdef HAVE_EXPAT
#include "ogr_expat.h"
#endif
class OGRGeoRSSDataSource;
typedef enum
{
GEORSS_ATOM,
GEORSS_RSS,
GEORSS_RSS_RDF,
} OGRGeoRSSFormat;
typedef enum
{
GEORSS_GML,
GEORSS_SIMPLE,
GEORSS_W3C_GEO
} OGRGeoRSSGeomDialect;
/************************************************************************/
/* OGRGeoRSSLayer */
/************************************************************************/
class OGRGeoRSSLayer : public OGRLayer
{
OGRFeatureDefn* poFeatureDefn;
OGRSpatialReference *poSRS;
OGRGeoRSSDataSource* poDS;
OGRGeoRSSFormat eFormat;
int bWriteMode;
int nTotalFeatureCount;
int eof;
int nNextFID;
VSILFILE* fpGeoRSS; /* Large file API */
int bHasReadSchema;
#ifdef HAVE_EXPAT
XML_Parser oParser;
XML_Parser oSchemaParser;
#endif
OGRGeometry* poGlobalGeom;
int bStopParsing;
int bInFeature;
int hasFoundLat;
int hasFoundLon;
double latVal;
double lonVal;
char* pszSubElementName;
char* pszSubElementValue;
int nSubElementValueLen;
int iCurrentField;
int bInSimpleGeometry;
int bInGMLGeometry;
int bInGeoLat;
int bInGeoLong;
int bFoundGeom;
OGRwkbGeometryType eGeomType;
int bSameSRS;
char* pszGMLSRSName;
int bInTagWithSubTag;
char* pszTagWithSubTag;
int currentDepth;
int featureDepth;
int geometryDepth;
OGRFieldDefn* currentFieldDefn;
int nWithoutEventCounter;
CPLHashSet* setOfFoundFields;
int nDataHandlerCounter;
OGRFeature* poFeature;
OGRFeature ** ppoFeatureTab;
int nFeatureTabLength;
int nFeatureTabIndex;
private:
#ifdef HAVE_EXPAT
void AddStrToSubElementValue(const char* pszStr);
#endif
int IsStandardField(const char* pszName);
public:
OGRGeoRSSLayer(const char *pszFilename,
const char* layerName,
OGRGeoRSSDataSource* poDS,
OGRSpatialReference *poSRSIn,
int bWriteMode = FALSE);
~OGRGeoRSSLayer();
void ResetReading();
OGRFeature * GetNextFeature();
OGRErr CreateFeature( OGRFeature *poFeature );
OGRErr CreateField( OGRFieldDefn *poField, int bApproxOK );
OGRFeatureDefn * GetLayerDefn();
int TestCapability( const char * );
OGRSpatialReference *GetSpatialRef();
int GetFeatureCount( int bForce );
void LoadSchema();
#ifdef HAVE_EXPAT
void startElementCbk(const char *pszName, const char **ppszAttr);
void endElementCbk(const char *pszName);
void dataHandlerCbk(const char *data, int nLen);
void startElementLoadSchemaCbk(const char *pszName, const char **ppszAttr);
void endElementLoadSchemaCbk(const char *pszName);
void dataHandlerLoadSchemaCbk(const char *data, int nLen);
#endif
};
/************************************************************************/
/* OGRGeoRSSDataSource */
/************************************************************************/
typedef enum
{
GEORSS_VALIDITY_UNKNOWN,
GEORSS_VALIDITY_INVALID,
GEORSS_VALIDITY_VALID
} OGRGeoRSSValidity;
class OGRGeoRSSDataSource : public OGRDataSource
{
char* pszName;
OGRGeoRSSLayer** papoLayers;
int nLayers;
/* Export related */
VSILFILE *fpOutput; /* Virtual file API */
OGRGeoRSSValidity validity;
OGRGeoRSSFormat eFormat;
OGRGeoRSSGeomDialect eGeomDialect;
int bUseExtensions;
int bWriteHeaderAndFooter;
#ifdef HAVE_EXPAT
XML_Parser oCurrentParser;
int nDataHandlerCounter;
#endif
public:
OGRGeoRSSDataSource();
~OGRGeoRSSDataSource();
int Open( const char * pszFilename,
int bUpdate );
int Create( const char *pszFilename,
char **papszOptions );
const char* GetName() { return pszName; }
int GetLayerCount() { return nLayers; }
OGRLayer* GetLayer( int );
OGRLayer * CreateLayer( const char * pszLayerName,
OGRSpatialReference *poSRS,
OGRwkbGeometryType eType,
char ** papszOptions );
int TestCapability( const char * );
VSILFILE * GetOutputFP() { return fpOutput; }
OGRGeoRSSFormat GetFormat() { return eFormat; }
OGRGeoRSSGeomDialect GetGeomDialect() { return eGeomDialect; }
int GetUseExtensions() { return bUseExtensions; }
#ifdef HAVE_EXPAT
void startElementValidateCbk(const char *pszName, const char **ppszAttr);
void dataHandlerValidateCbk(const char *data, int nLen);
#endif
};
/************************************************************************/
/* OGRGeoRSSDriver */
/************************************************************************/
class OGRGeoRSSDriver : public OGRSFDriver
{
public:
~OGRGeoRSSDriver();
const char* GetName();
OGRDataSource* Open( const char *, int );
OGRDataSource* CreateDataSource( const char * pszName, char **papszOptions );
int DeleteDataSource( const char *pszFilename );
int TestCapability( const char * );
};
#endif /* ndef _OGR_GeoRSS_H_INCLUDED */
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