/*

* Copyright (c) 2006 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:   Contains CNcdParentOfTransparentNode class

*

*/

#ifndef NCDPARENTOFTRANSPARENTNODE_H

#define NCDPARENTOFTRANSPARENTNODE_H

#include "ncdnodefolder.h"

class CNcdNodeManager;

class CNcdNodeIdentifier;

class CNcdParentOfTransparentNode : public CNcdNodeFolder

    {

public:

    /**

     * Destructor.

     */

    virtual ~CNcdParentOfTransparentNode();

public: //New functions

    /**

     * Checks whether a transparent child has been expired.

     *

     * @return ETrue if one of the children is expired/uninitialized or missing.

     */ 

    TBool IsTransparentChildExpiredL() const;

public: // CCatalogsCommunicable

    /**

     * @see CCatalogsCommunicable::ReceiveMessage

     */

    virtual void ReceiveMessage( MCatalogsBaseMessage* aMessage,

                                 TInt aFunctionNumber );

public: // CNcdNode

    /**

     * @see CNcdNodeFolder::ExternalizeL

     */

    virtual void ExternalizeL( RWriteStream& aStream );

    /**

     * @see CNcdNodeFolder::InternalizeL

     */

    virtual void InternalizeL( RReadStream& aStream );

protected:

    /**

     * @see CNcdNodeFolder::CNcdNodeFolder

     */

    CNcdParentOfTransparentNode( CNcdNodeManager& aNodeManager,

                                 NcdNodeClassIds::TNcdNodeClassId aNodeClassId = NcdNodeClassIds::ENcdRootNodeClassId );

    /**

     * @see CNcdNodeFolder::ConstructL

     */

    void ConstructL( const CNcdNodeIdentifier& aIdentifier );

    /** 

     * @see CNcdNode::ExternalizeDataForRequestL

     */

    virtual void ExternalizeDataForRequestL( RWriteStream& aStream ) const;    

    /**

     * This function replaces transparent folder by their children

     * when the child array is sent for the proxy.

     *

     * @see CNcdNodeFolder::ExternalizeChildArrayForRequestL

     */

    virtual void ExternalizeChildArrayForRequestL( RWriteStream& aStream ) const;

    /**

     * Checks whether a transparent child has been expired, writes the answer to the message and

     * completes it.

     */ 

    void IsTransparentChildExpiredL( MCatalogsBaseMessage& aMessage ) const;

private:

    // Prevent these if not implemented    

    CNcdParentOfTransparentNode( const CNcdParentOfTransparentNode& aObject );

    CNcdParentOfTransparentNode& operator =( const CNcdParentOfTransparentNode& aObject );    

private: // data

    };

#endif // NCDPARENTOFTRANSPARENTNODE_H