/*

* 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:  Xml properties class declaration     

*

*/

#ifndef SEN_XML_PROPERTIES_H

#define SEN_XML_PROPERTIES_H

#include <e32std.h>

#include <SenDomFragment.h>

#include <MSenProperties.h>

// FORWARD DECLARATIONS

class RWriteStream;

class CSenXmlReader;

class CSenPropertiesFragment;

// CONSTANTS

_LIT8(KSenXmlPropertiesLocalname,       "Properties");

_LIT8(KSenTypeAttributeName,            "Type");

_LIT8(KSenOmittedAttributeName,         "Omitted");

_LIT8(KSenOmittedTrueNoValue,            "");

_LIT8(KSenPropertyTrue,                 "true");

_LIT8(KSenPropertyFalse,                "false");

//_LIT8(KSenXmlPropertiesQualifiedname,  "props:Properties);

//_LIT8(KSenXmlPropertiesNamespace,      "urn:com.nokia.Sen.properties.1.0");

// CLASS DESCRIPTION

/*

* 

* This class provides XML based implementation, which is mainly targetted

* for further evolved subclasses, which extend this to more concrete classes,

* like CSenHttpTransportProperties. Class provides serialization of properties

* into XML.

* 

* Please bear in mind the following limitations:

* 

* 1. It is illegal to provide following property names as argument to 

*    any of the setter methods, as they become XML tags - local element

*    names - when properties object is serialized:

*      (a) zero-length descriptor

*      (b) descriptor starts with number and

*      c descriptor contains any of the 5 basic XML entities in 

*          unencoded form (&, ', ", <, >)

* 

* 2. It is illegal to provide following property values as argument to 

*    any of the setter methods, as they become XML element content when 

*    properties object is serialized:

*      (a) descriptor contains any of the 5 basic XML entities in

*      unencoded form (&, ', ", <, >)

* @lib SenUtils.lib

* @since Series60 5.0

*/

class CSenXmlProperties : public CBase, public MSenProperties

    {

    public:

        /**

        * Basic constructor.

        * @return a pointer to new CSenXmlProperties class instance.

        */

        IMPORT_C static CSenXmlProperties* NewL();

        /**

        * Basic constructor.

        * @return a pointer to new CSenXmlProperties class instance.

        */        

        IMPORT_C static CSenXmlProperties* NewLC();

        /**

        * Basic constructor.

		* @param aXmlUtf8 

    	* @param aParser It is a XML reader        

        * @return a pointer to new CSenTransportProperties class instance.

        */

        IMPORT_C static CSenXmlProperties* NewL(const TDesC8& aXmlUtf8,

                                       CSenXmlReader& aParser);

        /**

        * Basic constructor.

		* @param aXmlUtf8 

    	* @param aParser It is a XML reader        

        * @return a pointer to new CSenTransportProperties class instance.

        */

        IMPORT_C static CSenXmlProperties* NewLC(const TDesC8& aXmlUtf8,

                                        CSenXmlReader& aParser);

        /**

        * Basic constructor.

		* @param aElement

        * @return a pointer to new CSenXmlProperties class instance.

        */

        IMPORT_C static CSenXmlProperties* NewL(const CSenElement& aElement);

        /**

        * Basic constructor.

		* @param aElement

        * @return a pointer to new CSenXmlProperties class instance.

        */        

        IMPORT_C static CSenXmlProperties* NewLC(const CSenElement& aElement);

        // From MSenProperties

        virtual void SetReader(CSenXmlReader& aReader);

        virtual TSenPropertiesClassType PropertiesClassType();

        virtual void WriteToL(RWriteStream& aWriteStream);

        virtual void ReadFromL(const TDesC8& aBuffer);

        virtual HBufC8* AsUtf8L();

        virtual HBufC8* AsUtf8LC();

        virtual TBool IsSafeToCast(TSenPropertiesClassType aClass);

        virtual MSenProperties* Clone(TInt& aOkOrError) const;

        virtual MSenProperties* CloneL() const;

        /**

        * @see MSenProperties

        * Leave codes: 

        *      KErrSenInvalidCharacters if aName contains illegal characters.     

        *      KErrSenZeroLengthDescriptor if aName is zero length.

        */

        virtual TInt SetPropertyL(const TDesC8& aName,

                                  const TDesC8& aValue);

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

        /**

        * @see MSenProperties

        * Leave codes: 

        *      KErrSenInvalidCharacters if aName contains illegal characters.     

        *      KErrSenZeroLengthDescriptor if aName is zero length.

        */

        virtual TInt SetIntPropertyL(const TDesC8& aName,

                                     const TInt aValue);

        virtual TInt IntPropertyL(const TDesC8& aName,

                                  TInt& aValue);

        /**

        * @see MSenProperties

        * Leave codes: 

        *      KErrSenInvalidCharacters if aName contains illegal characters.     

        *      KErrSenZeroLengthDescriptor if aName is zero length.

        */

        virtual TInt SetBoolPropertyL(const TDesC8& aName,

                                      const TBool aValue);

        virtual TInt BoolPropertyL(const TDesC8& aName,

                                   TBool& aValue);        

        virtual TInt SetOmittedL(const TDesC8& aName, TBool aValue);

        virtual TInt RemovePropertyL(const TDesC8& aName);

        /**

        * Destructor.

        */

        virtual ~CSenXmlProperties();

        /**

        * 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.

        * @param aType         Is the type of this property.

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

        *                      error codes.

        */

        virtual TInt SetPropertyL(const TDesC8& aName, 

                                  const TDesC8& aValue,

                                  const TDesC8& aType);

        /**

        * Gets the value of the property behind certain name.

        * @since Series60

        * @param aName    The name identifying this property.

        * @param aValue   A TPtrC8 reference to be filled in with the value of

        *                 the property.

        * @param aType    A TPtrC8 reference to be filled in with the type of

        *                 the property.

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

        *                 error codes.     

        */

        virtual TInt PropertyL(const TDesC8& aName, 

                               TPtrC8& aValue,

                               TPtrC8& aType);

    protected: // base class functions

        virtual void BaseConstructL(const TDesC8& aLocalname, 

                                    const TDesC8& aXml,

                                    CSenXmlReader* aParser = NULL);

        virtual void BaseConstructL(const TDesC8& aNamespace, 

                                    const TDesC8& aLocalname, 

                                    const TDesC8& aXml,

                                    CSenXmlReader* aParser = NULL);

        virtual void BaseConstructL(const TDesC8& aNamespace, 

                                    const TDesC8& aLocalname, 

                                    const TDesC8& aQualifiedName, 

                                    const TDesC8& aXml,

                                    CSenXmlReader* aParser = NULL);

        virtual void BaseConstructL(const CSenElement& aElement);

    protected:

        /**

        * Constructor.

        */

        CSenXmlProperties();

    protected:

        CSenPropertiesFragment*     ipFragment; // owned

        CSenXmlReader*              ipReader;   // owned

    };

#endif // SEN_XML_PROPERTIES_H