/* --------------------------------------------------------------------------

   libmusicbrainz5 - Client library to access MusicBrainz

   Copyright (C) 2012 Andrew Hawkins

   This file is part of libmusicbrainz5.

   This library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   libmusicbrainz5 is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this library.  If not, see <http://www.gnu.org/licenses/>.

     $Id$

----------------------------------------------------------------------------*/

#ifndef _MUSICBRAINZ5_ENTITY_H

#define _MUSICBRAINZ5_ENTITY_H

#include <iostream>

#include <string>

#include <sstream>

#include <map>

#include "musicbrainz5/xmlParser.h"

namespace MusicBrainz5

{

	class CEntityPrivate;

	class CRelationListList;

	class CEntity

	{

	public:

		CEntity();

		CEntity(const CEntity& Other);

		CEntity& operator =(const CEntity& Other);

		virtual ~CEntity();

		virtual CEntity *Clone()=0;

		void Parse(const XMLNode& Node);

		std::map<std::string,std::string> ExtAttributes() const;

		std::map<std::string,std::string> ExtElements() const;

		virtual std::ostream& Serialise(std::ostream& os) const;

		static std::string GetElementName();

	protected:

		void ProcessRelationList(const XMLNode& Node, CRelationListList* & RetVal);

		template<typename T>

		void ProcessItem(const XMLNode& Node, T* & RetVal)

		{

			RetVal=new T(Node);

		}

		template<class T>

		void ProcessItem(const XMLNode& Node, T& RetVal)

		{

			std::stringstream os;

			if (Node.getText())

				os << (const char *)Node.getText();

			os >> RetVal;

			if (os.fail())

			{

#ifdef _MB5_DEBUG_

				std::cerr << "Error parsing value '";

				if (Node.getText())

					std::cerr << Node.getText();

				std::cerr << "'" << std::endl;

#endif

			}

		}

		template<typename T>

		void ProcessItem(const std::string& Text, T& RetVal)

		{

			std::stringstream os;

			os << Text;

			os >> RetVal;

			if (os.fail())

			{

#ifdef _MB5_DEBUG_

				std::cerr << "Error parsing value '" << Text << "'" << std::endl;

#endif

			}

		}

		void ProcessItem(const XMLNode& Node, std::string& RetVal)

		{

			if (Node.getText())

				RetVal=Node.getText();

		}

		virtual void ParseAttribute(const std::string& Name, const std::string& Value)=0;

		virtual void ParseElement(const XMLNode& Node)=0;

	private:

		CEntityPrivate *m_d;

		void Cleanup();

	};

}

std::ostream& operator << (std::ostream& os, const MusicBrainz5::CEntity& Entity);

#endif