/* -*- mode: c++ -*- 
*/
/* 

    GIFT, a flexible content based image retrieval system.
    Copyright (C) 1998, 1999, 2000 CUI, University of Geneva

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/
// -*- mode: c++ -*-
#ifndef _CDYNAMICBASETYPEFACTORY
#define _CDYNAMICBASETYPEFACTORY


#include <sys/types.h> // reading a directory
#include <dirent.h>    // reading a directory
#include <dlfcn.h>     // dynamic linking 

#include <iostream>    // screen output
#include <string>
#include <map>

#include "CStaticQueryFactory.h"
#include "CQueryPlugin.h"

class CDynamicQueryFactory:public CStaticQueryFactory,protected map<string,CQueryPlugin*>{
  
public:
  /** makes a query of a given BaseType (i.e. name) */
  CQuery* makeQuery(const string & inBaseType, 
		    CAccessorAdminCollection & inAccessorAdminCollection,
		    CAlgorithm & inAlgorithm);
  /** constructor: scans a given directory for plugins*/
  CDynamicQueryFactory(string inDirectoryName);
};

#endif
