src/WordSubIndex.h

/*  -*- C++ -*-

    textIR - A fast text document retrieval engine

    Copyright (C) 2005-2009 Laurence Park

    This program 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 program 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 program.  If not, see <http://www.gnu.org/licenses/>.

    File information:
    $Header: /home/staff/lapark/cvsroot/web_search/textIR/src/WordSubIndex.h,v 1.10 2009/10/08 06:41:31 lapark Exp $
*/

#ifndef WORDSUBINDEX_H
#define WORDSUBINDEX_H

#include "SubIndex.tcc"
#include "Word.h"
#include "ElementList.tcc"
#include "DocumentList.h"

// for plsa

class OrderHash {
 public:
  int _order;

  int _hashOrder;
};

class SortOrderHash {
 public:

  bool operator() (const OrderHash &x, const OrderHash &y) {
    return (x._hashOrder < y._hashOrder);
  }
};

class WordSubIndex : public SubIndex<Word> {
public:

  WordSubIndex(BlockStats *stats);
  ~WordSubIndex(void);

  void buildWordList(void);

  void buildDocumentList(void);

  int wordCount(void);

  int documentCount(void);

  Word *wordStats(int word);

  Document *documentStats(int document);

  void generateIndexList(int minDocumentCount,int maxDocumentCount);

  void generateIndexList(Word **queryTerms, int uniqueQueryTerms);

  void hashHack(void);

  int elementDocumentCount(int i);

  FILE_POS_TYPE elementFilePosition(int i);

  Word *indexStats(int word);

  int indexElements(int i);

  int indexLength(void);

  int rowLength(void);

protected:
  ElementList<Word> *_wordList;

  DocumentList *_documentList;

  BlockStats *_stats;
};

#endif

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