xapian-letor/ranker.cc

   1 /* ranker.cc: The abstract ranker file.
   2  *
   3  * Copyright (C) 2012 Parth Gupta
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
  18  * USA
  19  */
  20
  21 #include <ranker.h>
  22
  23 namespace Xapian {
  24
  25 Ranker::Ranker() {
  26 }
  27
  28     /* Override all the four methods below in the ranker sub-classes files
  29      * wiz svmranker.cc , listnet.cc, listmle.cc and so on
  30      */
  31 std::list<double>
  32 Ranker::rank(const Xapian::RankList & /*rl*/) {
  33     std::list<double> res;
  34
  35     double d=1.0;
  36     res.push_back(d);
  37     return res;
  38 }
  39
  40 void
  41 Ranker::learn_model() {
  42 }
  43
  44 void
  45 Ranker::load_model(const std::string & /*model_file*/) {
  46
  47 }
  48
  49 void
  50 Ranker::save_model() {
  51 }
  52
  53     /* This method should read the letor format data and transform into the list of
  54      * Xapian::RankList format
  55      */
  56 std::list<Xapian::RankList>
  57 Ranker::load_data(const std::string & /*data_file*/) {
  58     std::list<Xapian::RankList> res;
  59
  60     return res;
  61 }
  62
  63 }