/*

* Copyright (c) 2005 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:  Transport and Xml properies interface declaration     

*

*/

#ifndef M_SEN_PROPERTIES_H

#define M_SEN_PROPERTIES_H

const TInt KErrSenOmitted = 10;

// INCLUDES

#include <e32std.h>

// FORWARD DECLARATIONS

class RWriteStream;

class CSenXmlReader;

class MSenProperties

    {

    public:

        /**

        * PropertiesClassType enumeration. 

        */

        enum TSenPropertiesClassType

        	{

        	ENotInUse                           = 0,

        	ESenXmlProperties                   = 1,

        	ESenTransportProperties             = 2,

        	ESenHttpTransportProperties         = 3,    

            ESenVtcpTransportProperties         = 4,    

        	ESenLayeredXmlProperties            = 5,

        	ESenLayeredTransportProperties      = 6,

        	ESenLayeredHttpTransportProperties  = 7,

        	ESenLayeredVtcpTransportProperties  = 8

        	};

        /**

        *  Sets the XML reader to be used for parsing.

        *  @param aReader:     the reader to be used. 

        *                      Ownership is NOT transferred.

        */

        virtual void SetReader(CSenXmlReader& aReader) = 0;

        /**

        * Get an integer identifying properties class type.

        * All subclasses MUST return use unique integer value.

        * @return unique TInt identifying this properties class type

        */

        virtual TSenPropertiesClassType PropertiesClassType() = 0;

        /**

        * Writes this properties object as descriptor into a stream.

        * UTF-8 charset encoding will be used.

        * @since Series60

        * @param aWriteStream The stream to write to.

        */

        virtual void WriteToL(RWriteStream& aWriteStream) = 0;

        /**

        * Reads this properties object from the descriptor.

        * UTF-8 charset encoding should be used.

        * @since Series60

        * @param aBuffer The buffer to read from.

        */

        virtual void ReadFromL(const TDesC8& aBuffer) = 0;

        /**

        * Get these properties as UTF-8 charset encoded descriptor.

        * @since Series60

        * @return a pointer to UTF-8 encoded descriptor.

        * Caller takes ownership.

        */

        virtual HBufC8* AsUtf8L() = 0;

        /**

        * Get these properties as UTF-8 charset encoded descriptor.

        * @since Series60

        * @return a pointer to UTF-8 encoded descriptor, which is

        * has been left on cleanup stack.

        * Caller takes ownership.

        */

        virtual HBufC8* AsUtf8LC() = 0;

        /**

        * Sets new property. 

        *

        * If property with given name does not exist, 

        * new property with given value will be added. Otherwise the value of 

        * existing property will be updated.

        *

        * @since Series60

        * @param aName         Name of the property, which can be later used to

        *                      refer the given value.

        * @param aValue        Is the value of this property.

        * @return              KErrNone if no error, or some of the system wide

        *                      error codes.

        * Leave codes:

        *                      According to implementing classes. 

        */

        virtual TInt SetPropertyL(const TDesC8& aName,

                                  const TDesC8& aValue) = 0;

        /**

        * Gets the value of the property behind certain name.

        * @since Series60

        * @param aName    The name identifying this property.

        * @param aValue   The value of the property, or KNullDesC8 if

        *                 property is not found.

        * @return KErrNone on success, KErrSenOmitted if property

        * has been omitted, or some of the system-wide error codes

        * otherwise.                  

        */

        virtual TInt PropertyL(const TDesC8& aName, TPtrC8& aValue) = 0;

        /**

        * Sets new integer property.

        *

        * If property with given name does not exist, 

        * new property with given value will be added. Otherwise the value of

        * existing property will be updated.

        *

        * @since Series60

        * @param aName         Name of the property, which can be later used

        *                      to refer the given value.

        * @param aValue        Is the integer value of this property.

        * @return              KErrNone if no error, or some of the system wide

        *                      error codes.

        * Leave codes:

        *                      According to implementing classes. 

        */

        virtual TInt SetIntPropertyL(const TDesC8& aName,

                                     const TInt aValue) = 0;

        /**

        * Gets the integer value of the property behind certain name.

        * @since Series60

        * @param aName    The name identifying this property.

        * @param aValue   A TInt reference to be filled in with the value of

        *                 the property.

        * @return KErrNone on success, KErrSenOmitted if property

        * has been omitted, or some of the system-wide error codes

        * otherwise.                  

        */

        virtual TInt IntPropertyL(const TDesC8& aName,

                                  TInt& aValue) = 0;

        /**

        * Sets new boolean property.

        *

        * If property with given name does not exist, 

        * new property with given value will be added. Otherwise the value of

        * existing property will be updated.

        *

        * @since Series60

        * @param aName         Name of the property, which can be later used

        *                      to refer the given value.

        * @param aValue        The boolean value of this property.

        * @return              KErrNone if no error, or some of the system wide

        *                      error codes.

        * Leave codes:

        *                      According to implementing classes. 

        */

        virtual TInt SetBoolPropertyL(const TDesC8& aName,

                                      const TBool aValue) = 0;

        /**

        * Gets the boolean value of the property behind certain name.

        * @since Series60

        * @param aName    The name identifying this property.

        * @param aValue   A TBool reference to be filled in with the value of

        *                 the property.

        * @return KErrNone on success, KErrSenOmitted if property

        * has been omitted, or some of the system-wide error codes

        * otherwise.                  

        */

        virtual TInt BoolPropertyL(const TDesC8& aName,

                                   TBool& aValue) = 0;

        /**

        * Method creates exact copy of the properties, preserving

        * the real, concrete subclass type (this can be resolved

        * via PropertiesClassType() method. Furthermore, the

        * IsSafeToCast() method can be used to reflect the returned

        * pointer to a concrete class. NOTE: one must cast the

        * returned pointer to concrete class in order to safely

        * de-allocate any memory allocated by this method.

        * @param aOkOrError is KErrNone when clone is successfully

        * allocated, or some system-wide error otherwise.

        * @return pointer to *concrete* properties object, which

        * MUST be class cast to known subclass(!).

        */                                   

		virtual MSenProperties* Clone(TInt& aOkOrError) const = 0;

        /**

        * Method provies reflection support for properties classes,

        * enabling safe class-casts to concrete subclass objects.

        * @return ETrue, if object is of a known subclass type

        *         EFalse, if the object cannot be cast to given type.

        */

        virtual TBool IsSafeToCast(TSenPropertiesClassType aClass) = 0;

        /**

        * Method creates exact copy of the properties, preserving

        * the real, concrete subclass type (this can be resolved

        * via PropertiesClassType() method. Furthermore, the

        * IsSafeToCast() method can be used to reflect the returned

        * pointer to a concrete class. NOTE: one must cast the

        * returned pointer to concrete class in order to safely

        * de-allocate any memory allocated by this method.

        * @return pointer to *concrete* properties object, which

        * MUST be class cast to known subclass(!).

        */                                   

        virtual MSenProperties* CloneL() const = 0;

    };

#endif // M_SEN_PROPERTIES_H