/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#ifndef PREFIXOPT_H_

#define PREFIXOPT_H_

#include <string>

#include <wchar.h>

// Forward declarations

namespace lucene { 

	namespace search {

		class Query;  

	}

}

namespace Cpix 

{

	/**

	 * Goes throught the query hiearchy and converts queries of 

	 * form "field:c*" into form "field_prefix:c".

	 * 

	 */

	class PrefixOptQueryRewriter

	{

		public:

			PrefixOptQueryRewriter(int maxPrefixLength, 

								   const wchar_t* optimizedField, 

								   const wchar_t* prefixField);

			~PrefixOptQueryRewriter();

			std::auto_ptr<lucene::search::Query>

				rewrite(std::auto_ptr<lucene::search::Query> query);

		private: 

			int maxPrefixLength_; 

			std::wstring optimizedField_; 

			std::wstring prefixField_;

	};

}

#endif /* PREFIXOPT_H_ */