include/xapian/expanddecider.h

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00001 
00004 /* Copyright (C) 2007 Olly Betts
00005  *
00006  * This program is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU General Public License as
00008  * published by the Free Software Foundation; either version 2 of the
00009  * License, or (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
00019  */
00020 
00021 #ifndef XAPIAN_INCLUDED_EXPANDDECIDER_H
00022 #define XAPIAN_INCLUDED_EXPANDDECIDER_H
00023 
00024 #include <set>
00025 #include <string>
00026 
00027 #include <xapian/visibility.h>
00028 
00029 namespace Xapian {
00030 
00032 class XAPIAN_VISIBILITY_DEFAULT ExpandDecider {
00033   public:
00035     virtual bool operator()(const std::string &term) const = 0;
00036 
00038     virtual ~ExpandDecider();
00039 };
00040 
00046 class XAPIAN_VISIBILITY_DEFAULT ExpandDeciderAnd : public ExpandDecider {
00047     const ExpandDecider &first, &second;
00048 
00049   public:
00053     ExpandDeciderAnd(const ExpandDecider &first_,
00054                      const ExpandDecider &second_)
00055         : first(first_), second(second_) { }
00056 
00058     ExpandDeciderAnd(const ExpandDecider *first_,
00059                      const ExpandDecider *second_)
00060         : first(*first_), second(*second_) { }
00061 
00062     virtual bool operator()(const std::string &term) const;
00063 };
00064 
00070 class XAPIAN_VISIBILITY_DEFAULT ExpandDeciderFilterTerms : public ExpandDecider {
00071     std::set<std::string> rejects;
00072 
00073   public:
00079     template <class Iterator>
00080     ExpandDeciderFilterTerms(Iterator reject_begin, Iterator reject_end)
00081         : rejects(reject_begin, reject_end) { }
00082 
00083     virtual bool operator()(const std::string &term) const;
00084 };
00085 
00086 }
00087 
00088 #endif // XAPIAN_INCLUDED_EXPANDDECIDER_H

Documentation for Xapian (version 1.0.10).
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