/*

* Copyright (c) 2000 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: Implementation of policymanagement components

*

*/

#ifndef POLICY_PARSER_HEADER_

#define POLICY_PARSER_HEADER_

// INCLUDES

#include "ElementBase.h"

#include "PolicyEngineClientServer.h"

#include <e32base.h>

#include <cstack.h>

// CONSTANTS

enum TAllowedExternalIdConflicts

{

	KNoExternalIdCheck = 0,

	KSameExternalIdAllowedForRoot,

	KNoExternalIdConflictsAllowed

};

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class CElementBase;

class CPolicyStorage;

// CLASS DECLARATION

namespace ParserUtility

{

	TBool ContainsCDataField( TPtrC8& aChunk);

	void ReadCDataAreaL( TPtrC8& aCDataArea, TPtrC8& aChunk, TPtrC8& aFinalPart);

	void RemoveCDataMarksL( TPtrC8& aData);

	TInt LineCounter( TPtrC8& aData);

}

class CPolicyParser : public CBase, public Xml::MContentHandler

{

	public:

		static CPolicyParser * NewL( CPolicyStorage * aStorage);

		CPolicyParser( CPolicyStorage * aStorage);

		virtual ~CPolicyParser();

		void ConstructL();

		CElementBase * ParseXACMLObjects( TInt& aError, const TDesC8 &aXACML, TDes8 &aReturnText);

		TInt ParseNativeObjects( CElementBase * aSeedElement, const TDesC8 &aNative, TBool aAddToEditableCache);

		void HandleErrorL( const TDesC8 &aText);

		void HandleErrorL( const TDesC8 &aText, const TDesC8 &aErrorElement);

		void HandleErrorL( const TAny * aPointer, const TDesC8 &aError, const TDesC8 &aErrorElement);

		TDesC8& ActiveElementName();

		void HandleNativeErrorL( TInt aError);

		TLanguageSelector Language();

		void SetExternalIdChecked( TAllowedExternalIdConflicts aCheckerState);

		void CheckExternalIdL( const HBufC8 * iExternalId);

		void SetLineOffset( TInt aLine);

		//Validity Check functions

		void CheckCompiningAlgorithmsL( TNativeElementTypes aType, const TDesC8& aAlgorithmId );

		void CheckFunctionIdL( const TNativeElementTypes& aType, const TDesC8& aFunctionId );

		void CheckEffectL( const TDesC8& aEffect );

		void CheckDataTypeL( const TDesC8& aDataType );

		//convert XACML to Native 

		const TDesC8& ConvertElementNamesL( const TDesC8& aElementName );

		const TDesC8& ConvertAttributesL( const TDesC8& aType );

		static const TDesC8& ConvertValues( TLanguageSelector aOriginalLanguage, const TDesC8& aValue);

		//from content handler

		void OnStartDocumentL(const Xml::RDocumentParameters& aDocParam, TInt aErrorCode);

    	void OnEndDocumentL(TInt aErrorCode);

    	void OnStartElementL(const Xml::RTagInfo& aElement, const Xml::RAttributeArray& aAttributes, TInt aErrorCode);

    	void OnEndElementL(const Xml::RTagInfo& aElement, TInt aErrorCode);

    	void OnContentL(const TDesC8& aBytes, TInt aErrorCode);

    	void OnStartPrefixMappingL(const RString& aPrefix, const RString& aUri, TInt aErrorCode);

    	void OnEndPrefixMappingL(const RString& aPrefix, TInt aErrorCode);

    	void OnIgnorableWhiteSpaceL(const TDesC8& aBytes, TInt aErrorCode);

    	void OnSkippedEntityL(const RString& aName, TInt aErrorCode);

    	void OnProcessingInstructionL(const TDesC8& aTarget, const TDesC8& aData, TInt aErrorCode);

    	void OnError(TInt aErrorCode);

		TAny* GetExtendedInterface(const TInt32 aUid);

	private:

		void CreateIdElementsL( const TDesC8& aIdString);

		void ParseL( const TDesC8 &aXACML);

	private: 

		TPtrC8 iActiveElementName;

		TInt iActiveLine;

		TInt iLineOffset;

		Xml::CParser * iParser;

		CStack<CElementBase, EFalse> * iElementStack;

		CElementBase * iActiveElement;

		CElementBase * iRootElement;

		CPolicyStorage * iStorage;

		TLanguageSelector iLanguage;

		TAllowedExternalIdConflicts iCheckerState;

		TBool iErrorHandling;

		TBuf8<KMaxReturnMessageLength> iReturnText;

		TBool iAddToEditableCache;

		TBool iValidCharacterSet;

};

#endif