# 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