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FieldEqualsNode.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.cs.cmu.edu/~lemur/license.html 
  as well as the conditions below.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  1. Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in
  the documentation and/or other materials provided with the
  distribution.

  3. The names "Indri", "Center for Intelligent Information Retrieval", 
  "CIIR", and "University of Massachusetts" must not be used to
  endorse or promote products derived from this software without
  prior written permission. To obtain permission, contact
  indri-info@ciir.cs.umass.edu.

  4. Products derived from this software may not be called "Indri" nor 
  may "Indri" appear in their names without prior written permission of 
  the University of Massachusetts. To obtain permission, contact 
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  ==========================================================================
*/


//
// FieldEqualsNode.hpp
//
// 26 October 2004 -- tds
//

#ifndef INDRI_FIELDEQUALSNODE_HPP
#define INDRI_FIELDEQUALSNODE_HPP

#include "indri/ListIteratorNode.hpp"
#include "indri/greedy_vector"
#include "lemur-platform.h"

class FieldEqualsNode : public ListIteratorNode {
private:
  class FieldIteratorNode* _field;
  greedy_vector<Extent> _extents;
  UINT64 _constant;
  std::string _name;

public:
  FieldEqualsNode( const std::string& name, class FieldIteratorNode* iterator, UINT64 constant );

  void prepare( int documentID );
  greedy_vector<Extent>& extents();
  int nextCandidateDocument();
  const std::string& getName() const;
  void annotate( class Annotator& annotator, int documentID, int begin, int end );
};

#endif // INDRI_FIELDEQUALSNODE_HPP

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