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TreePrinterWalker.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
 *
 *==========================================================================
*/


//
// TreePrinterWalker
//
// 9 March 2004 -- tds
//

#ifndef INDRI_TREEPRINTERWALKER_HPP
#define INDRI_TREEPRINTERWALKER_HPP

#include "indri/QuerySpec.hpp"

class TreePrinterWalker : public indri::lang::Walker {
private:
  unsigned int _tabs;
public:
  TreePrinterWalker() : _tabs(0) {}

  void before( indri::lang::IndexTerm* node ) {
    for( unsigned int i=0; i<_tabs; i++ )
      std::cout << "\t";

    std::cout << "IndexTerm "
              << node->getText().c_str()
              << " "
              << node->nodeName().c_str()
              << std::endl;

    _tabs++;
  }

  void before( indri::lang::Field* node ) {
    for( unsigned int i=0; i<_tabs; i++ )
      std::cout << "\t";

    std::cout << "Field "
              << node->getFieldName().c_str()
              << " "
              << node->nodeName().c_str()
              << std::endl;

    _tabs++;
  }

  void defaultBefore( indri::lang::Node* node ) {
    for( unsigned int i=0; i<_tabs; i++ )
      std::cout << "\t";

    std::string type = node->typeName();
    std::string query = node->queryText();

    std::cout << type
              << " "
              << query
              << std::endl;

    _tabs++;
  }

  void defaultAfter( indri::lang::Node* node ) {
    _tabs--;
  }
};

#endif // INDRI_TREEPRINTERWALKER_HPP

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