probabilities.h

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//
//    FreeLing - Open Source Language Analyzers
//
//    Copyright (C) 2014   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 Affero 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
//    Affero General Public License for more details.
//
//    You should have received a copy of the GNU Affero 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 _PROBABILITIES
#define _PROBABILITIES

#include <map>

#include "freeling/windll.h"
#include "freeling/morfo/language.h"
#include "freeling/morfo/processor.h"
#include "freeling/morfo/tagset.h"

namespace freeling {

  const std::wstring RE_FZ=L"^[FZ]";


  class WINDLL probabilities : public processor {
  private:
    freeling::regexp RE_PunctNum;

    double ProbabilityThreshold;
    const tagset *Tags;

    double BiassSuffixes; 

    double LidstoneLambdaLexical; 
    double LidstoneLambdaClass; 

    bool activate_guesser;

    std::map<std::wstring,double> single_tags;
    std::map<std::wstring,std::map<std::wstring,double> > class_tags;
    std::map<std::wstring,std::map<std::wstring,double> > lexical_tags;
    std::map<std::wstring,double> unk_tags;
    std::map<std::wstring,std::map<std::wstring,double> > unk_suffs;
    double theeta;
    std::wstring::size_type long_suff;

    // list of default preferences of lemma/pos to sort analysis 
    // in case tagger leaves residual ambiguity
    std::map<std::wstring,std::wstring> lemma_prefs;
    std::map<std::wstring,std::wstring> pos_prefs;

    void smoothing(word &) const;
    double compute_probability(const std::wstring &, double, const std::wstring &) const;
    double guesser(word &, double) const;
    bool less(const analysis &a1, const analysis &a2) const;
    void sort_list(std::list<analysis> &ls) const;

  public:
    probabilities(const std::wstring &, double);
    ~probabilities();

    void annotate_word(word &) const;

    void set_activate_guesser(bool);

    void analyze(sentence &) const;

    using processor::analyze;
  };

} // namespace

#endif