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//
// OperatorQuery.cc
//
// OperatorQuery: (abstract class) a query that combines result lists
// returned by other queries kept in an operand list.
// how they are combined is tbd by the concrete classes.
//
// 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: OperatorQuery.cc,v 1.4 2004/05/28 13:15:24 lha Exp $
//
#include "OperatorQuery.h"
//
// return a string with the query as a boolean expression
// descends recursively over the operand
//
String
OperatorQuery::GetLogicalWords() const
{
ListCursor c;
String out;
out << "(";
if(operands.Count())
{
operands.Start_Get(c);
out << ((Query *) operands.Get_Next(c))->GetLogicalWords();
Query *next = (Query *) operands.Get_Next(c);
while(next)
{
out << " " << OperatorString() << " ";
if(next)
{
out << next->GetLogicalWords();
}
else
{
out << "*nothing*";
}
next = (Query *) operands.Get_Next(c);
}
}
out << ")";
return out;
}
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