classifier.h

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//
//    FreeLing - Open Source Language Analyzers
//
//    Copyright (C) 2004   TALP Research Center
//                         Universitat Politecnica de Catalunya
//
//    This library is free software; you can redistribute it and/or
//    modify it under the terms of the GNU General Public
//    License as published by the Free Software Foundation; either
//    version 3 of the License, or (at your option) any later version.
//
//    This library is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//    General Public License for more details.
//
//    You should have received a copy of the GNU General Public
//    License along with this library; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
//    contact: Lluis Padro (padro@lsi.upc.es)
//             TALP Research Center
//             despatx C6.212 - Campus Nord UPC
//             08034 Barcelona.  SPAIN
//

#ifndef _CLASSIFIER
#define _CLASSIFIER

#include <string>
#include <vector>

#include "freeling/omlet/example.h"


class classifier {

 private:
  // label names, provided in the constructor
  std::vector<std::wstring> labels;
  std::wstring label_others;
  
 public:
  // constructor
  classifier(const std::wstring &);
  //destructor
  virtual ~classifier() {};
  // return number of classes of the model 
  virtual int get_nlabels() const;
  // return class name for name with given code
  virtual std::wstring get_label(int) const;
  // return default class name (or empty string if no default class used)
  virtual std::wstring default_class() const;
  virtual void classify(const example &, double[]) const =0;
};

#endif