statement_iterator.h
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1 /*
2  * Copyright (C) 2005 Tommi Maekitalo
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * As a special exception, you may use this file as part of a free
10  * software library without restriction. Specifically, if other files
11  * instantiate templates or use macros or inline functions from this
12  * file, or you compile this file and link it with other files to
13  * produce an executable, this file does not by itself cause the
14  * resulting executable to be covered by the GNU General Public
15  * License. This exception does not however invalidate any other
16  * reasons why the executable file might be covered by the GNU Library
17  * General Public License.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  */
28 
29 #ifndef TNTDB_BITS_STATEMENT_ITERATOR_H
30 #define TNTDB_BITS_STATEMENT_ITERATOR_H
31 
32 #include <tntdb/iface/icursor.h>
33 #include <tntdb/bits/row.h>
34 #include <tntdb/bits/statement.h>
35 #include <iterator>
36 
37 namespace tntdb
38 {
39  class RowReader;
40 
45  : public std::iterator<std::forward_iterator_tag, Row>
46  {
47  Row current;
49 
50  public:
51  const_iterator(ICursor* cursor_ = 0);
52 
57  bool operator== (const const_iterator& c) const
58  { return cursor == c.cursor; }
63  bool operator!= (const const_iterator& c) const
64  { return cursor != c.cursor; }
65 
72 
76  const Row& operator* () const { return current; }
80  const Row* operator-> () const { return &current; }
81 
83  template <typename T>
84  RowReader get(T& ret) const;
85 
87  template <typename T>
88  RowReader get(T& ret, bool& nullInd) const;
89 
93  const ICursor* getImpl() const { return &*cursor; }
94  };
95 
99 }
100 
101 #endif // TNTDB_BITS_STATEMENT_ITERATOR_H
102