/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/*
 * XSEC
 *
 * XSECAlgorithmMapper := Provides a table of AlgorithmHandlers
 *						  Mapped by Type URI
 *
 * $Id$
 *
 */

#ifndef XSECALGMAPPER_INCLUDE
#define XSECALGMAPPER_INCLUDE

// XSEC Includes

#include <xsec/framework/XSECDefs.hpp>

#include <vector>

class XSECAlgorithmHandler;

/**
 * @ingroup internal
 *\@{*/


/**
 * @brief Holder class for mapping Algorithms to Handlers
 *
 */

class XSEC_EXPORT XSECAlgorithmMapper {

public:
	
	/** @name Constructors and Destructors */
	//@{
	
	XSECAlgorithmMapper(void);
	~XSECAlgorithmMapper();

	//@}

	/** @name Default mapping strings */
	//@{

	static const XMLCh s_defaultEncryptionMapping[];

	/** @name Map Methods */
	//@{

	/**
	 * \brief Map a URI to a handler
	 */

	const XSECAlgorithmHandler* mapURIToHandler(const XMLCh* URI) const;

	//@}

	/** @name Registration Methods */
	//@{

	/**
	 * \brief Register a new handler
	 */

	void registerHandler(const XMLCh* URI, const XSECAlgorithmHandler& handler);

	/**
	 * \brief Indicate an algorithm is approved for use, implying others are not.
	 */

	void whitelistAlgorithm(const XMLCh* URI);

    /**
     * \brief Indicate an algorithm is not approved for use, implying others are.
     */

	void blacklistAlgorithm(const XMLCh* URI);

	//@}

private:

	struct MapperEntry {

		XMLCh* mp_uri;
		XSECAlgorithmHandler* mp_handler;

	};

	MapperEntry* findEntry(const XMLCh* URI) const;

#if defined(XSEC_NO_NAMESPACES)
	typedef vector<MapperEntry*>			MapperEntryVectorType;
    typedef vector<XMLCh*>                  WhitelistVectorType;
#else
	typedef std::vector<MapperEntry*>		MapperEntryVectorType;
    typedef std::vector<XMLCh*>             WhitelistVectorType;
#endif

	MapperEntryVectorType		            m_mapping;
    WhitelistVectorType                     m_whitelist,m_blacklist;
};

/*\@}*/

#endif /* XSECALGMAPPER_INCLUDE */