/home/tommi/tntdb/include/tntdb/bits/statement_iterator.h

00001 /*
00002  * Copyright (C) 2005 Tommi Maekitalo
00003  * 
00004  * This library is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Lesser General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2.1 of the License, or (at your option) any later version.
00008  * 
00009  * As a special exception, you may use this file as part of a free
00010  * software library without restriction. Specifically, if other files
00011  * instantiate templates or use macros or inline functions from this
00012  * file, or you compile this file and link it with other files to
00013  * produce an executable, this file does not by itself cause the
00014  * resulting executable to be covered by the GNU General Public
00015  * License. This exception does not however invalidate any other
00016  * reasons why the executable file might be covered by the GNU Library
00017  * General Public License.
00018  * 
00019  * This library is distributed in the hope that it will be useful,
00020  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00021  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00022  * Lesser General Public License for more details.
00023  * 
00024  * You should have received a copy of the GNU Lesser General Public
00025  * License along with this library; if not, write to the Free Software
00026  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00027  */
00028 
00029 #ifndef TNTDB_BITS_STATEMENT_ITERATOR_H
00030 #define TNTDB_BITS_STATEMENT_ITERATOR_H
00031 
00032 #include <tntdb/iface/icursor.h>
00033 #include <tntdb/bits/row.h>
00034 #include <tntdb/bits/statement.h>
00035 #include <iterator>
00036 
00037 namespace tntdb
00038 {
00042   class Statement::const_iterator
00043       : public std::iterator<std::forward_iterator_tag, Row>
00044   {
00045       Row current;
00046       cxxtools::SmartPtr<ICursor> cursor;
00047 
00048     public:
00049       const_iterator(ICursor* cursor_ = 0);
00050 
00055       bool operator== (const const_iterator& c) const
00056         { return cursor == c.cursor; }
00061       bool operator!= (const const_iterator& c) const
00062         { return cursor != c.cursor; }
00063 
00068       const_iterator& operator++();
00069       const_iterator operator++(int);
00070 
00074       const Row& operator* () const   { return current; }
00078       const Row* operator-> () const  { return &current; }
00079 
00083       const ICursor* getImpl() const  { return &*cursor; }
00084   };
00085 }
00086 
00087 #endif // TNTDB_BITS_STATEMENT_ITERATOR_H
00088