matcher/scaleweight.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_SCALEWEIGHT_H
00022 #define XAPIAN_INCLUDED_SCALEWEIGHT_H
00023 
00024 #include <xapian/enquire.h>
00025 
00027 class ScaleWeight : public Xapian::Weight {
00028     Xapian::Weight * real_wt;
00029 
00030     double factor;
00031 
00032   public:
00033     ScaleWeight * clone() const;
00034     ScaleWeight(Xapian::Weight * real_wt_, double factor_)
00035         : real_wt(real_wt_), factor(factor_) { }
00036     ~ScaleWeight();
00037     std::string name() const;
00038     std::string serialise() const;
00039     ScaleWeight * unserialise(const std::string & s) const;
00040     Xapian::weight get_sumpart(Xapian::termcount wdf, Xapian::doclength len) const;
00041     Xapian::weight get_maxpart() const;
00042 
00043     Xapian::weight get_sumextra(Xapian::doclength len) const;
00044     Xapian::weight get_maxextra() const;
00045 
00046     bool get_sumpart_needs_doclength() const;
00047 };
00048 
00049 #endif // XAPIAN_INCLUDED_SCALEWEIGHT_H

Documentation for Xapian (version 1.0.10).
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