/*

* Copyright (c) 2009 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:  Represent property condition

*

*/

#ifndef __MDEPROPERTYCONDITION_H__

#define __MDEPROPERTYCONDITION_H__

#include <mdecondition.h>

/* Forward declarations. */

class CMdEPropertyDef;

class CMdCSerializationBuffer;

/**

 * CMdEPropertyCondition is the base class for all property conditions.

 * Instances of CMdEPropertyCondition and its subclasses are always associated

 * with a property definition.

 */

NONSHARABLE_CLASS(CMdEPropertyCondition) : public CMdECondition

	{

public:

    /* Types. */

	/**

	 * Two-phased constructor.

	 */

	static CMdEPropertyCondition* NewL( const CMdEPropertyDef& aPropertyDef );

   /**

    * Two-phased constructor.

    */

   static CMdEPropertyCondition* NewLC( const CMdEPropertyDef& aPropertyDef );

	/**

	 * Destructor.

	 */

	virtual ~CMdEPropertyCondition();

	/* Methods. */

    /** 

     * Returns the property definition of the condition.

     *

     * @return  Property definition.

     */

    IMPORT_C const CMdEPropertyDef& PropertyDef() const;

    /**

     * Get possible query's internal optimization flags from condition.

     *

     * @param aFlaga query's internal optimization flags

     * @return last level internal optimization flags

     */

    TUint32 InternalQueryOptimizationFlags(TUint32& aFlags);

    /**

     * Get required size of serialized buffer when this is serialized.

     *

     * @return required size of serialized buffer

     */

    virtual TUint32 RequiredBufferSize() const;

    /**

     * Serialize own data to serialized buffer (correct position must be set 

     * before calling) and return new position of serialized buffer.

	 *

     * @param aBuffer  serialized buffer.

     */

    virtual void SerializeL(CMdCSerializationBuffer& aBuffer,

    		TMdCOffset& aFreespaceOffset) const;

protected:

	/**

	 * Constructor for a condition that tests the existence of properties.

	 *

	 * @param aPropertDef  Property definition.

	 */

	CMdEPropertyCondition(const CMdEPropertyDef& aPropertyDef);

    /**

     * Second-phase constructor.

     */

    void ConstructL();

    /**

	 * Constructor that sets the condition type as well.

	 *

	 * @param aType  Type of the condition node.

	 */

	CMdEPropertyCondition(TConditionType aConditionType, 

                          const CMdEPropertyDef& aPropertyDef);

protected:

    /** The property this condition operates on. */

    const CMdEPropertyDef& iPropertyDef;

    };

#endif  // __MDEPROPERTYCONDITION_H__