/*

* Copyright (c) 2004-2008 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:  CCFNotOperation class declaration.

*

*/

#ifndef C_CFNOTOPERATION_H

#define C_CFNOTOPERATION_H

// INCLUDES

#include <e32base.h>

#include "cfoperationnode.h"

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

*  This class implements NotOperation XML node of CFW script on Context

* Framework Scripts.

*

*  @lib CFScriptEngine

*  @since S60 v5.0

*/

NONSHARABLE_CLASS( CCFNotOperation ) : public CCFOperationNode

    {

public: // Constructors and destructor

    /**

    * Creates a CCFNotOperation object.

    * @param aServices is the operation services interface for nodes.

    * @param aParent is parent node for this node. The ownership of the parent

    *   is not transffered.

    * @return A pointer to the created instance of CCFNotOperation.

    */

    static CCFNotOperation* NewL( MCFOperationServices& aServices,

            CCFOperationNode* aParent );

    /**

    * Creates a CCFNotOperation object.

    * @param aServices is the operation services interface for nodes.

    * @param aParent is parent node for this node. The ownership of the parent

    *   is not transffered.

    * @return A pointer to the created instance of CCFNotOperation.

    */

    static CCFNotOperation* NewLC( MCFOperationServices& aServices,

            CCFOperationNode* aParent );

    /**

    * Creates and parses a CCFNotOperation instance from an xml node.

    * @param aServices is the operation services interface for nodes.

    * @param aParent is the parent of this node or NULL if this is a root.

    *   The ownership of the parent is not transferred.

    * @param aNode is the node to be parsed.

    * @return a pointer to the created instance of CCFNotOperation, or NULL if

    *   the node is not this or node. May leave with any system wide error code.

    */

    static CCFNotOperation* ParseL( MCFOperationServices& aServices,

            CCFOperationNode* aParent,

            CMDXMLNode& aNode );

    /**

    * Destructor.

    */

    ~CCFNotOperation();

protected: // Functions from CCFOperationNode

    /**

    * Activates this node by passing the activate call to its' child.

    */

    void ActivateL();

    /**

    * Deactivates this node by passing the deactivate call to its' child.

    */

    void Deactivate();

    /**

    * Asks this node to check its security (via services interface). For

    * example, the security of contexts to be subscribed.

    * @return KErrNone if security check passed, otherwise any of the system

    *   wide error codes.

    */

    TInt CheckSecurity();

    /**

    * Called by child node, to ask the parent to re-evaluate its value,

    * since the child's value has changed.

    * @return None.

    */

    void Evaluate();

    /**

    * Cleanup long term resources like persistent data files.

    * This is called by the context framework when the script is uninstalled

    * from the system.

    */ 

    void Cleanup();

private:

    /**

    * C++ default constructor.

    * @param aServices is the operation services interface for nodes.

    * @param aParent is parent node for this node. The ownership of the parent

    *   is not transffered.

    */

    CCFNotOperation( MCFOperationServices& aServices,

            CCFOperationNode* aParent );

    /**

    * By default Symbian 2nd phase constructor is private.

    */

    void ConstructL();

private: // Data

    // May have one operation as a child.

    CCFOperationNode* iChild;

    };

#endif // C_CFNOTOPERATION_H