1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 #ifndef PREFIXOPT_H_

    19 #define PREFIXOPT_H_

    20 

    21 #include <string>

    22 #include <wchar.h>

    23 

    24 // Forward declarations

    25 namespace lucene { 

    26 	namespace search {

    27 		class Query;  

    28 	}

    29 }

    30 

    31 namespace Cpix 

    32 {

    33 

    34 	/**

    35 	 * Goes throught the query hiearchy and converts queries of 

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

    37 	 * 

    38 	 */

    39 	class PrefixOptQueryRewriter

    40 	{

    41 		public:

    42 		

    43 			PrefixOptQueryRewriter(int maxPrefixLength, 

    44 								   const wchar_t* optimizedField, 

    45 								   const wchar_t* prefixField);

    46 			

    47 			~PrefixOptQueryRewriter();

    48 		

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

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

    51 			

    52 		private: 

    53 			

    54 			int maxPrefixLength_; 

    55 			

    56 			std::wstring optimizedField_; 

    57 			

    58 			std::wstring prefixField_;

    59 			

    60 	};

    61 

    62 }

    63 

    64 #endif /* PREFIXOPT_H_ */