relax_tagger.h

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00001 
00002 //
00003 //    FreeLing - Open Source Language Analyzers
00004 //
00005 //    Copyright (C) 2004   TALP Research Center
00006 //                         Universitat Politecnica de Catalunya
00007 //
00008 //    This library is free software; you can redistribute it and/or
00009 //    modify it under the terms of the GNU General Public
00010 //    License as published by the Free Software Foundation; either
00011 //    version 2.1 of the License, or (at your option) any later version.
00012 //
00013 //    This library is distributed in the hope that it will be useful,
00014 //    but WITHOUT ANY WARRANTY; without even the implied warranty of
00015 //    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016 //    General Public License for more details.
00017 //
00018 //    You should have received a copy of the GNU General Public
00019 //    License along with this library; if not, write to the Free Software
00020 //    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
00021 //
00022 //    contact: Lluis Padro (padro@lsi.upc.es)
00023 //             TALP Research Center
00024 //             despatx C6.212 - Campus Nord UPC
00025 //             08034 Barcelona.  SPAIN
00026 //
00028 
00029 #ifndef _RELAX_TAGGER
00030 #define _RELAX_TAGGER
00031 
00032 #include <list> 
00033 #include <string>
00034 
00035 #include "fries/language.h"
00036 #include "freeling/tagger.h"
00037 #include "freeling/relax.h"
00038 #include "freeling/constraint_grammar.h"
00039 
00040 #include "regexp-pcre++.h"
00041 
00042 // RegExp to detect user field usage
00043 #define USER_RE "^u\\.([0-9]+)=(.+)$"
00044 
00045 
00053 
00054 class relax_tagger : public POS_tagger {
00055    private:
00057       relax solver;
00059       constraint_grammar c_gram;
00060 
00061       // RegExp to detect user field usage. It's stored here precompiled for efficiency.
00062       RegEx RE_user;
00063 
00066       bool CheckCondition(const sentence &, sentence::const_iterator, int, 
00067                           const condition &, std::list<std::list<std::pair<int,int> > > &);
00070       bool CheckWordMatchCondition(const std::list<std::string> &, bool, int, sentence::const_iterator,
00071                                    std::list<std::pair<int,int> > &);
00073       bool check_possible_matching(const std::string &, word::const_iterator,
00074                                    sentence::const_iterator); 
00076       bool check_match(const std::string &, const std::string &) const;
00077 
00078    public:
00080        relax_tagger(const std::string &, int, double, double, bool, unsigned int);
00081 
00083        void analyze(std::list<sentence> &);
00085        std::list<sentence> analyze(const std::list<sentence> &);
00086 };
00087 
00088 
00089 #endif
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