/*

* Copyright (c) 2006-2009 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:

* Name        : sipparameterheaderbase.h

* Part of     : SIP Codec

* Interface   : SDK API, SIP Codec API

* Version     : SIP/4.0

*

*/

#ifndef CSIPPARAMETERHEADERBASE_H

#define CSIPPARAMETERHEADERBASE_H

//  INCLUDES

#include "sipheaderbase.h"

// FORWARD DECLARATIONS

class CSIPParamContainerBase;

// CLASS DECLARATION

/**

* @publishedAll

* @released

*

* A base class for SIP headers that have structure

*        "mandatory part"delimiter"parameters"

*

* This is an abstract class and cannot be instantiated.

*

*  @lib sipcodec.lib

*/

class CSIPParameterHeaderBase : public CSIPHeaderBase

    {

    public:    // Constructors and destructor

        /**

        * Destructor, deletes the resources of CSIPParameterHeaderBase.

        */

        IMPORT_C virtual ~CSIPParameterHeaderBase();

    public: // New functions

        /**

        * Checks if a parameter is present

        * @param aName the name of the parameter

        * @return ETrue if present, otherwise EFalse

        */

        IMPORT_C TBool HasParam(RStringF aName) const;

        /**

        * Gets a parameter value

        * @pre HasParam(aName) == ETrue

        * @param aName the name of the parameter

        * @return the parameter value if present,

        *         otherwise a zero-length length value.

        */

        IMPORT_C RStringF ParamValue(RStringF aName) const;

        /**

        * Sets a parameter with a value. 

        * Takes copies of the name and value,

        * so if the RStringFs have been dynamically allocated,

        * they can be closed if necessary after the function returns.

        * @pre HasParam(aName) == EFalse

        * @param aName the name of the parameter

        * @param aValue the parameter value to set

        */

        IMPORT_C void SetParamL(RStringF aName, RStringF aValue);

        /**

        * Sets a parameter without a value

        * Takes copy of the name,

        * so if the RStringF has been dynamically allocated,

        * it can be closed if necessary after the function returns.

        * @pre HasParam(aName) == EFalse

        * @param aName the parameter name to set

        */

        IMPORT_C void SetParamL(RStringF aName);

        /**

        * Deletes a parameter

        * @param aName the parameter name to delete

        */

        IMPORT_C void DeleteParam(RStringF aName);

        /**

        * Gets the count of header parameters

        * @return count of header parameters

        */

        IMPORT_C TInt ParamCount() const;

        /**

        * Gets a header parameter name by index.

        * This function can be used when looping through

        * all the header parameters.

        * @param aIndex the index of the parameter

        * @param aName copy of the parameter name that must be 

        *        closed by the caller.       

        * @return KErrNotFound if aIndex is invalid. Otherwise EFalse.

        */

        IMPORT_C TInt Param(TInt aIndex, RStringF& aName) const;

    public: // From CSIPHeaderBase

        /**

        * From CSIPHeaderBase ToTextValueL

        */

        IMPORT_C HBufC8* ToTextValueL() const;

    protected: // Contructors

        CSIPParameterHeaderBase(const TChar& aSeparator);        

    protected: // New functions

        void ParseL(const TDesC8& aValue, 

        				  TBool aIgnoreParenthesis=ETrue, 

        				  TBool aSkipSeparatorsBeforeAt=EFalse);

    protected: // Virtual functions

        /**

        * @internalComponent

        */    

        virtual TBool ParamInsertionAllowed() const;

    protected: // Pure virtual functions

        /**

        * @internalComponent

        */

        virtual HBufC8* ToTextMandatoryPartLC() const = 0;

        /**

        * @internalComponent

        */        

        virtual void ParseMandatoryPartL(const TDesC8& aMandatoryPart) = 0;

        /**

        * @internalComponent

        */        

        virtual const CSIPParamContainerBase& Params() const = 0;

        /**

        * @internalComponent

        */        

        virtual CSIPParamContainerBase& Params() = 0;

    private: // Contructors

        CSIPParameterHeaderBase();

    private: // Data

        TChar iSeparator;

    private: // For testing purposes

#ifdef CPPUNIT_TEST 

        friend class CSIPParameterHeaderBaseTest;

#endif

    };

#endif // CSIPPARAMETERHEADERBASE_H

// End of File