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/******************************************************************************
* $Id: ogrunionlayer.h 24640 2012-07-01 19:37:38Z rouault $
*
* Project: OpenGIS Simple Features Reference Implementation
* Purpose: Defines OGRUnionLayer class
* Author: Even Rouault, even dot rouault at mines dash paris dot org
*
******************************************************************************
* Copyright (c) 2012, Even Rouault <even dot rouault at mines dash paris dot org>
*
* 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 _OGRUNIONLAYER_H_INCLUDED
#define _OGRUNIONLAYER_H_INCLUDED
#include "ogrsf_frmts.h"
/************************************************************************/
/* OGRUnionLayer */
/************************************************************************/
typedef enum
{
FIELD_FROM_FIRST_LAYER,
FIELD_UNION_ALL_LAYERS,
FIELD_INTERSECTION_ALL_LAYERS,
FIELD_SPECIFIED,
} FieldUnionStrategy;
typedef enum
{
GEOMTYPE_FROM_FIRST_LAYER,
GEOMTYPE_UNION_ALL_LAYERS,
GEOMTYPE_SPECIFIED,
} GeometryTypeUnionStrategy;
class OGRUnionLayer : public OGRLayer
{
protected:
CPLString osName;
int nSrcLayers;
OGRLayer **papoSrcLayers;
int bHasLayerOwnership;
OGRFeatureDefn *poFeatureDefn;
int nFields;
OGRFieldDefn **papoFields;
FieldUnionStrategy eFieldStrategy;
CPLString osSourceLayerFieldName;
OGRwkbGeometryType eGeomType;
GeometryTypeUnionStrategy eGeometryTypeStrategy;
int bPreserveSrcFID;
OGRSpatialReference *poSRS;
int bSRSSet;
int nFeatureCount;
OGREnvelope sStaticEnvelope;
int iCurLayer;
char *pszAttributeFilter;
int nNextFID;
int *panMap;
char **papszIgnoredFields;
int bAttrFilterPassThroughValue;
int *pabModifiedLayers;
int *pabCheckIfAutoWrap;
void AutoWarpLayerIfNecessary(int iSubLayer);
OGRFeature *TranslateFromSrcLayer(OGRFeature* poSrcFeature);
void ApplyAttributeFilterToSrcLayer(int iSubLayer);
int GetAttrFilterPassThroughValue();
void ConfigureActiveLayer();
public:
OGRUnionLayer( const char* pszName,
int nSrcLayers, /* must be >= 1 */
OGRLayer** papoSrcLayers, /* array itself ownership always transferred, layer ownership depending on bTakeLayerOwnership */
int bTakeLayerOwnership);
virtual ~OGRUnionLayer();
/* All the following non virtual methods must be called just after the constructor */
/* and before any virtual method */
void SetSRS(OGRSpatialReference *poSRS); /* duplicated by the method */
void SetFields(FieldUnionStrategy eFieldStrategy,
int nFields,
OGRFieldDefn** papoFields); /* duplicated by the method */
void SetGeometryType(GeometryTypeUnionStrategy eGeometryTypeStrategy,
OGRwkbGeometryType eGeomType);
void SetSourceLayerFieldName(const char* pszSourceLayerFieldName);
void SetPreserveSrcFID(int bPreserveSrcFID);
void SetFeatureCount(int nFeatureCount);
void SetExtent(double dfXMin, double dfYMin, double dfXMax, double dfYMax);
virtual const char *GetName() { return osName.c_str(); }
virtual OGRwkbGeometryType GetGeomType();
virtual void ResetReading();
virtual OGRFeature *GetNextFeature();
virtual OGRFeature *GetFeature( long nFeatureId );
virtual OGRErr CreateFeature( OGRFeature* poFeature );
virtual OGRErr SetFeature( OGRFeature* poFeature );
virtual OGRFeatureDefn *GetLayerDefn();
virtual OGRSpatialReference *GetSpatialRef();
virtual int GetFeatureCount( int );
virtual OGRErr SetAttributeFilter( const char * );
virtual int TestCapability( const char * );
virtual OGRErr GetExtent( OGREnvelope *psExtent, int bForce );
virtual void SetSpatialFilter( OGRGeometry * poGeomIn );
virtual OGRErr SetIgnoredFields( const char **papszFields );
virtual OGRErr SyncToDisk();
};
#endif // _OGRUNIONLAYER_H_INCLUDED
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