/*

* 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 QUERYPARSER_H_

#define QUERYPARSER_H_

#include <memory>

#include "CLucene.h"

#include "CLucene/queryParser/MultiFieldQueryParser.h"

#include "prefixopt.h"

#include "cpixsearch.h"

namespace Cpix {

	class IQueryParser {

		public:

			virtual ~IQueryParser();

			virtual std::auto_ptr<lucene::search::Query> parse(const wchar_t* query) = 0;

			// Not really a fundamental property of a query parser:

			virtual const wchar_t* getField() const = 0;

			virtual void setDefaultOperator(cpix_QP_Operator op) = 0;

	};

		public: 

			virtual std::auto_ptr<lucene::search::Query> parse(const wchar_t* query);

			virtual const wchar_t* getField() const;

			virtual void setDefaultOperator(cpix_QP_Operator op);

		private: 

			std::auto_ptr<lucene::queryParser::QueryParser> parser_;  

	};

		public: 

										 lucene::analysis::Analyzer& analyzer, 

										 lucene::queryParser::BoostMap& boostMap);

			virtual std::auto_ptr<lucene::search::Query> parse(const wchar_t* query);

			virtual const wchar_t* getField() const;

			virtual void setDefaultOperator(cpix_QP_Operator op);

		private: 

			std::auto_ptr<lucene::queryParser::QueryParser> parser_;  

	};

	class PrefixOptQueryParser : public IQueryParser {

		public:

			PrefixOptQueryParser(std::auto_ptr<IQueryParser> parser);

			~PrefixOptQueryParser(); 

			virtual std::auto_ptr<lucene::search::Query> parse(const wchar_t* query);

			virtual const wchar_t* getField() const;

			virtual void setDefaultOperator(cpix_QP_Operator op);

		private:

			PrefixOptQueryRewriter prefixOpt_; 

			std::auto_ptr<IQueryParser> parser_;

	};

	// 

	// Following factory methods apply necessary optimization wraps

	// over the query parsers.

	// 

	IQueryParser* CreateCLuceneQueryParser(const wchar_t* defaultField, 

									       lucene::analysis::Analyzer* analyzer);

	IQueryParser* CreateCLuceneMultiFieldQueryParser(

											const wchar_t* fields[], 

											lucene::analysis::Analyzer* analyzer, 

											lucene::queryParser::BoostMap* boostMap);

	IQueryParser* CreatePrefixQueryParser(const wchar_t* field); 

}

#endif /* QUERYPARSER_H_ */