Soprano  2.9.0
iteratorbackend.h
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1 /*
2  * This file is part of Soprano Project.
3  *
4  * Copyright (C) 2006 Daniele Galdi <daniele.galdi@gmail.com>
5  * Copyright (C) 2007 Sebastian Trueg <trueg@kde.org>
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Library General Public
9  * License as published by the Free Software Foundation; either
10  * version 2 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Library General Public License for more details.
16  *
17  * You should have received a copy of the GNU Library General Public License
18  * along with this library; see the file COPYING.LIB. If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20  * Boston, MA 02110-1301, USA.
21  */
22 
23 #ifndef SOPRANO_ITERATOR_BACKEND_H
24 #define SOPRANO_ITERATOR_BACKEND_H
25 
26 #include "soprano_export.h"
27 #include "error.h"
28 
29 namespace Soprano {
30 
39  template<class T> class IteratorBackend : public Error::ErrorCache
40  {
41  public:
42  virtual ~IteratorBackend() {}
43 
54  virtual bool next() = 0;
55 
66  virtual T current() const = 0;
67 
76  virtual void close() = 0;
77 
78  protected:
80  };
81 }
82 
83 #endif