System documentation of the GNU Image-Finding Tool

CAccessor.h
1 /* -*- mode: c++ -*-
2 */
3 /*
4 
5  GIFT, a flexible content based image retrieval system.
6  Copyright (C) 1998, 1999, 2000, 2001, 2002, CUI University of Geneva
7 
8  Copyright (C) 2003, 2004 Bayreuth University
9  2005 Bamberg University
10  This program is free software; you can redistribute it and/or modify
11  it under the terms of the GNU General Public License as published by
12  the Free Software Foundation; either version 2 of the License, or
13  (at your option) any later version.
14 
15  This program is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  GNU General Public License for more details.
19 
20  You should have received a copy of the GNU General Public License
21  along with this program; if not, write to the Free Software
22  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 
24 */
25 #ifndef _CACCESSOR
26 #define _CACCESSOR
27 #include "libMRML/include/uses-declarations.h"
28 #include <string>
29 #include <list>
30 #include "libMRML/include/TID.h"
31 
32 #ifdef GIFT_MULTI_THREAD
33 #include <pthread.h>
34 #endif
35 
36 #include "libMRML/include/CMutex.h"
37 #include "libMRML/include/CAccessorElement.h"
38 class CXMLElement;
39 
55 class CAccessor{
56 protected:
62  virtual void dummy()const;
63 
64 public:
70  virtual operator bool()const=0;
71 
77  virtual string IDToURL(TID inID)const=0;
83  virtual pair<bool,CAccessorElement> IDToAccessorElement(TID inID)const=0;
84 
90  virtual pair<bool,TID> URLToID(const string& inURL)const=0;
91 
100  virtual void getAllIDs(list<TID>&)const=0;
103  virtual void getAllAccessorElements(list<CAccessorElement>&)const=0;
108  virtual void getRandomIDs(list<TID>&,
109  list<TID>::size_type)const=0;
118  virtual void getRandomAccessorElements(list<CAccessorElement>& outResult,
119  list<CAccessorElement>::size_type inSize)const=0;
121  virtual int size()const=0;
123 
137  virtual CXMLElement* prepareDatabase();
142  virtual bool isPreparedDatabase()const;
144 
145  virtual ~CAccessor();
146 };
147 
148 #endif

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