FieldStatistics.hpp

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/*==========================================================================
 * Copyright (c) 2004 University of Massachusetts.  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.lemurproject.org/license.html
 *
 *==========================================================================
 */


//
// FieldStatistics
//
// 4 February 2004 -- tds
//

#ifndef INDRI_FIELDSTATISTICS_HPP
#define INDRI_FIELDSTATISTICS_HPP

namespace indri {
  namespace index {
    struct FieldStatistics {
      FieldStatistics( const std::string& _name, bool numeric, bool ordinal, bool parental )
        :
        name(_name),
        isNumeric(numeric),
        isOrdinal(ordinal),
        isParental(parental),
        totalCount(0),
        documentCount(0),
        lastDocument(0),
        lastCount(0),
        byteOffset(0)
      {
      }

      FieldStatistics( const std::string& _name, bool numeric, bool ordinal, bool parental, UINT64 _totalCount, unsigned int _documentCount, UINT64 _byteOffset )
        :
        name(_name),
        isNumeric(numeric),
        isOrdinal(ordinal),
        isParental(parental),
        totalCount(_totalCount),
        documentCount(_documentCount),
        lastDocument(0),
        lastCount(0), 
        byteOffset(_byteOffset)
      {
      }

      void addOccurrence( lemur::api::DOCID_T documentID ) {
        if( documentID != lastDocument ) {
          lastCount = 0;
          lastDocument = documentID;
          documentCount++;
        }

        totalCount++;
        lastCount++;
      }
      
      std::string name;
      bool isNumeric;
      bool isOrdinal;
      bool isParental;
      UINT64 totalCount;
      unsigned int documentCount;
      UINT64 byteOffset;

      lemur::api::DOCID_T lastDocument;
      int lastCount;
    };
  }
}

#endif // INDRI_FIELDSTATISTICS_HPP

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