/*

* 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:  CCFEqual class declaration.

*

*/

#ifndef C_CFEQUAL_H

#define C_CFEQUAL_H

// INCLUDES

#include "cfcontextoperation.h"

#include <e32base.h>

// FORWARD DECLARATIONS

class CCFContextObject;

// CLASS DECLARATION

/**

*   This class implements equal -operation on Context Framework Scripts.

*

*  @lib CFScriptEngine

*  @since Series 60 2.6

*/

NONSHARABLE_CLASS( CCFEqual ): public CCFContextOperation

    {

public: // Constructors and destructor

    /**

    * Creates a CCFEqual object

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

    * @param aParent is parent node for this node.

    * @param aName is name of the context object this operation operates on.

    * @param aSource is the source of the context object this operation

    *   operates on.

    * @param aType is the interpretation of aCmpVal

    * @param aCmpVal is a string representation of the comparison value

    * @return a pointer to the created instance of CCFEqual

    */

    static CCFEqual* NewL( MCFOperationServices& aServices,

            CCFOperationNode* aParent,

            TDesC& aName,

            TDesC& aSource,

            const CCFContextOperation::TCmpType aType,

            const TDesC& aCmpVal );

    /**

    * Creates a CCFEqual object

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

    * @param aParent is parent node for this node.

    * @param aName is name of the context object this operation operates on.

    * @param aSource is the source of the context object this operation

    *   operates on.

    * @param aType is the interpretation of aCmpVal

    * @param aCmpVal is a string representation of the comparison value

    * @return a pointer to the created instance of CCFEqual

    */

    static CCFEqual* NewLC( MCFOperationServices& aServices,

            CCFOperationNode* aParent,

            TDesC& aName,

            TDesC& aSource,

            const CCFContextOperation::TCmpType aType,

            const TDesC& aCmpVal );

    /**

    * Creates and parses a CCFEqual 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 CCFEqual, or NULL if the node

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

    */

    static CCFEqual* ParseL( MCFOperationServices& aServices,

            CCFOperationNode* aParent,

            CMDXMLNode& aNode );

    /**

    * Destructor.

    */

    ~CCFEqual();

private:

    /**

    * C++ default constructor.

    */

    CCFEqual( MCFOperationServices& aServices,

            CCFOperationNode* aParent,

            HBufC* aName,

            HBufC* aSource,

            const CCFContextOperation::TCmpType aType );

    /**

    * By default Symbian 2nd phase constructor is private.

    */

    void ConstructL( const TDesC& aCmpVal );

protected: // From CCFContextOperation

    /**

    * Returns ETrue if this operation is true

    */

    TBool IsTrueL( const CCFContextObject& aContextObject );

private: // Data

    CCFContextOperation::TCmpType iType;

    HBufC*                        iCmpValue;

    };

#endif // C_CFEQUAL_H