ugklayerattrindex.h

来自「linux下一款GIS程序源码」· C头文件 代码 · 共 44 行

// ugklayerattrIndex.h: interface for the UGKLayerAttrIndex class.
//
/************************************************************************/
/*                          UGKLayerAttrIndex                           */
/*                                                                      */
/*      Base class representing attribute indexes for all indexed       */
/*      fields in a layer.                                              */
/************************************************************************/

#ifndef  UGKLayerAttrIndex_H
#define  UGKLayerAttrIndex_H

#include "ugkattrIndex.h"
#include "ugkfeature.h"

class UGKLayer;

class UGKLayerAttrIndex  
{
protected:
    UGKLayer    *poLayer;
    char        *pszIndexPath;

                UGKLayerAttrIndex();

public:
	
	virtual     ~UGKLayerAttrIndex();

	virtual UGKErr Initialize( const char *pszIndexPath, UGKLayer * ) = 0;
	
	virtual UGKErr CreateIndex( int iField ) = 0;
	virtual UGKErr DropIndex( int iField ) = 0;
	virtual UGKErr IndexAllFeatures( int iField = -1 ) = 0;

	virtual UGKErr AddToIndex( UGKFeature *poFeature, int iField = -1 ) = 0;
	virtual UGKErr RemoveFromIndex( UGKFeature *poFeature ) = 0;

	virtual UGKAttrIndex *GetFieldIndex( int iField ) = 0;

};

#endif