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InvFPTermList.hpp

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/*==========================================================================
 * Copyright (c) 2001 Carnegie Mellon University.  All Rights Reserved.
 *
 * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
 * is subject to the terms of the software license set forth in the LICENSE
 * file included with this software, and also available at
 * http://www.cs.cmu.edu/~lemur/license.html
 *
 *==========================================================================
*/

/*
  10/18/2002 -- dmf Add binReadC, binWriteC, deltaDecode, and deltEncode
  for compression of TermInfoLists.
 */

#ifndef _INVFPTERMLIST_HPP
#define _INVFPTERMLIST_HPP

#include "common_headers.hpp"
#include "InvFPTerm.hpp"
#include "InvFPTypes.hpp"
#include "RVLCompress.hpp"

class File;

class InvFPTermList : public TermInfoList {
public:
  InvFPTermList();
  InvFPTermList(int did, int len, vector<LocatedTerm> &tls);
  ~InvFPTermList();

  void startIteration();

  bool hasMore();

  TermInfo *nextEntry();

  int docLength(){ return length; }

  int termCount() { return listlen; }

  int docID() { return uid; }

  bool binRead(ifstream& infile);
  bool binReadC(ifstream& infile);
  void binWriteC(ofstream& ofile);

  bool binReadC( File& infile );
  void binWriteC( File& outfile );

  virtual void deltaDecode();
  virtual void deltaEncode();

  void countTerms();

protected:
  DOCID_T uid; // this doc's id
  int length;  // length of this document (terms + stopwords)
  LocatedTerm* list; // list of terms and locations
  LLTerm* listcounted; // list of terms and location lists
  int listlen; // number of items we have in list  (same as number of terms)
  int index;   // index for iterator
  int* counts; // keep track of counts of terms for bag of word
  InvFPTerm entry;
  vector<int> loclist; //list of locations to return 

};




#endif

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