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#ifndef _ExactWordQuery_h_
#define _ExactWordQuery_h_
//
// ExactWordQuery.h
//
// ExactWordQuery: A Query tree leaf object. Wraps a database access
// that generates ResultLists for word matches.
//
// Part of the ht://Dig package <http://www.htdig.org/>
// Copyright (c) 1995-2004 The ht://Dig Group
// For copyright details, see the file COPYING in your distribution
// or the GNU Library General Public License (LGPL) version 2 or later
// <http://www.gnu.org/copyleft/lgpl.html>
//
// $Id: ExactWordQuery.h,v 1.4 2004/05/28 13:15:24 lha Exp $
//
#ifdef HAVE_CONFIG_H
#include "htconfig.h"
#endif
#include "Query.h"
class WordSearcher;
class ExactWordQuery : public Query
{
public:
// construct for word w
ExactWordQuery(const String &w) :
word(w), weight(1.0) {}
// destruct
~ExactWordQuery() {}
// set the common db wrapper
static void SetSearcher(WordSearcher *c) { searcher = c; }
// weight accessor
void SetWeight(double x) { weight = x; }
double GetWeight() const { return weight; }
private:
// forbidden
ExactWordQuery() {}
// go search the db
ResultList *Evaluate();
// set my weight to the list
void AdjustWeight(ResultList &);
// unparse
String GetLogicalWords() const { return word; }
// unique cache index
String GetSignature() const
{ return String("Exact:")+GetLogicalWords(); }
// i represent this
String word;
// my weight
double weight;
// db wrapper common to all word queries
static WordSearcher *searcher;
};
#endif
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