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Index.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
 *
 *==========================================================================
*/


#ifndef _INDEX_HPP
#define _INDEX_HPP


// C. Zhai 02/08/2001

#include "TermInfoList.hpp"
#include "DocInfoList.hpp"
#include "DocumentManager.hpp"

class Index {
public:

  virtual ~Index() {}; 



  virtual bool open(const string &indexName)=0;



  virtual int term (const string &word) const=0;

  virtual const string term (int termID) const=0;

  virtual int document (const string &docIDStr) const=0;

  virtual const string document (int docID) const=0;

  //  virtual const char* docManager(int docID) { return NULL;}
  virtual const DocumentManager* docManager(int docID) const {return NULL;}



  virtual const string termLexiconID() const { return "";} 




  virtual int docCount () const=0;

  virtual int termCountUnique () const=0;

  virtual int termCount (int termID) const=0;

  virtual int termCount () const=0;

  virtual float docLengthAvg() const=0;

  virtual int docCount(int termID) const=0;

  virtual int docLength (int docID) const=0;




  virtual DocInfoList *docInfoList(int termID) const=0;

  virtual TermInfoList *termInfoList(int docID) const=0;


  // returns TermInfoList is sequential representation (not bag of words)
  // return NULL list when sequence is not available.
  virtual TermInfoList *termInfoListSeq(int docID) const { return NULL; }

};


#endif

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