ugklayer.h

linux下一款GIS程序源码

// ugklayer.h: interface for the UGKLayer class.

/************************************************************************/
/*                               UGKLayer                               */
/************************************************************************/

#ifndef  UGKLayer_H
#define  UGKLayer_H

#include "ugkglobal.h"
#include "ugkgeometry.h"
#include "ugkfeature.h"
#include "ugklayerattrIndex.h"


class UGKLayer  
{
protected:
	int          m_bFilterIsEnvelope;
	UGKGeometry  * m_poFilterGeom;
       UGKEnvelope  m_sFilterEnvelope;

	int          FilterGeometry( UGKGeometry * ){return 0;};//暂时不考虑
	int          InstallFilter( UGKGeometry * ){return 0;};//暂时不考虑

public:
	UGKLayer();
	virtual ~UGKLayer();

	virtual UGKGeometry *GetSpatialFilter();
	virtual void        SetSpatialFilter( UGKGeometry * ){}//暂时不考虑
       virtual void        SetSpatialFilterRect( double dfMinX, double dfMinY,
		double dfMaxX, double dfMaxY ){}//暂时不考虑

	virtual UGKErr      SetAttributeFilter( const char * ){return UGKERR_NONE;}//暂时不考虑

	virtual void        ResetReading() = 0;
	virtual UGKFeature *GetNextFeature() = 0;
	virtual UGKErr      SetNextByIndex( long nIndex );
	virtual UGKFeature *GetFeature( long nFID );
	virtual UGKErr      SetFeature( UGKFeature *poFeature );
	virtual UGKErr      CreateFeature( UGKFeature *poFeature );
	virtual UGKErr      DeleteFeature( long nFID );

	virtual UGKFeatureDefn *GetLayerDefn() = 0;

	virtual int         GetFeatureCount( int bForce = TRUE );
	virtual UGKErr      GetExtent(UGKEnvelope *psExtent, int bForce = TRUE);

      virtual int         TestCapability( const char * ) = 0;
	
	virtual const char *GetInfo( const char * );

       virtual UGKErr      CreateField( UGKFieldDefn *poField,
                                     int bApproxOK = TRUE );

	virtual UGKErr      SyncToDisk();

	UGKStyleTable       *GetStyleTable(){return m_poStyleTable;}
	void                 SetStyleTable(UGKStyleTable *poStyleTable){m_poStyleTable = poStyleTable;}

	virtual UGKErr       StartTransaction();
	virtual UGKErr       CommitTransaction();
	virtual UGKErr       RollbackTransaction();

	int                 Reference();
	int                 Dereference();
	int                 GetRefCount() const;

	UGKInt64             GetFeaturesRead();

	UGKErr               InitializeIndexSupport( const char * );
	UGKLayerAttrIndex   *GetIndex() { return m_poAttrIndex; }

protected:
	UGKStyleTable       *m_poStyleTable;
	//UGKFeatureQuery     *m_poAttrQuery; //暂时不考虑Feature查询
	UGKLayerAttrIndex   *m_poAttrIndex;

	int                  m_nRefCount;

	UGKInt64              m_nFeaturesRead;




};

#endif