// -*- Mode: C++ -*-

//          GiSTcursor.h
//
// Copyright (c) 1996, Regents of the University of California
// $Header: /cvsroot/Tree-M/GiST/GiSTcursor.h,v 1.1 2001/05/06 00:45:51 root Exp $

#ifndef GISTCURSOR_H
#define GISTCURSOR_H

#include "GiSTdefs.h"
#include "GiSTentry.h"
#include "GiSTpredicate.h"
#include "GiSTlist.h"
#include "GiSTpath.h"

class GiST;

class GiSTcursor: public GiSTobject {
public:
	GiSTcursor(const GiST& gist, const GiSTpredicate& query);
	GiSTentry *Next();
	GiSTobjid IsA() const { return GISTCURSOR_CLASS; }
	~GiSTcursor();
	const GiSTpath& Path() const;

private:
	const GiST& gist;
	GiSTpath path;
	GiSTlist<GiSTentry*> stack;
	int first;
	GiSTpredicate *query;
	int lastlevel;
};

#endif