# include/xapian/sorter.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_SORTER_H
    00022 #define XAPIAN_INCLUDED_SORTER_H
    00023
    00024 #include <string>
    00025 #include <vector>
    00026
    00027 #include <xapian/document.h>
    00028 #include <xapian/visibility.h>
    00029
    00030 namespace Xapian {
    00031
    00033 class XAPIAN_VISIBILITY_DEFAULT Sorter {
    00034   public:
    00039     virtual std::string operator()(const Xapian::Document & doc) const = 0;
    00040
    00042     virtual ~Sorter();
    00043 };
    00044
    00051 class XAPIAN_VISIBILITY_DEFAULT MultiValueSorter : public Sorter {
    00052     std::vector<std::pair<Xapian::valueno, bool> > valnos;
    00053
    00054   public:
    00055     MultiValueSorter() { }
    00056
    00057     template <class Iterator>
    00058     MultiValueSorter(Iterator begin, Iterator end) {
    00059         while (begin != end) add(*begin++);
    00060     }
    00061
    00062     virtual std::string operator()(const Xapian::Document & doc) const;
    00063
    00064     void add(Xapian::valueno valno, bool forward = true) {
    00065         valnos.push_back(std::make_pair(valno, forward));
    00066     }
    00067
    00068     virtual ~MultiValueSorter();
    00069 };
    00070
    00071 }
    00072
    00073 #endif // XAPIAN_INCLUDED_SORTER_H