System documentation of the GNU Image-Finding Tool

CAccessor.h

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

    GIFT, a flexible content based image retrieval system.
    Copyright (C) 1998, 1999, 2000, 2001, 2002, 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

*/
#ifndef _CACCESSOR
#define _CACCESSOR
#include "libMRML/include/uses-declarations.h"
#include <string>
#include <list>
#include "libMRML/include/TID.h"

#ifdef GIFT_MULTI_THREAD
#include <pthread.h>
#endif

#include "libMRML/include/CMutex.h"
#include "libMRML/include/CAccessorElement.h"
class CXMLElement;

class CAccessor{
protected:
  virtual void  dummy()const;

public:
  virtual operator bool()const=0;

  virtual string IDToURL(TID inID)const=0;
  virtual pair<bool,CAccessorElement> IDToAccessorElement(TID inID)const=0;
  
  virtual pair<bool,TID> URLToID(const string& inURL)const=0;
  
  virtual void getAllIDs(list<TID>&)const=0;
  virtual void getAllAccessorElements(list<CAccessorElement>&)const=0;
  virtual void getRandomIDs(list<TID>&,
                            list<TID>::size_type)const=0;
  virtual void getRandomAccessorElements(list<CAccessorElement>& outResult,
                                         list<CAccessorElement>::size_type inSize)const=0;
  virtual int size()const=0;

  virtual CXMLElement* prepareDatabase();
  virtual bool isPreparedDatabase()const;

  virtual ~CAccessor();
};

#endif

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