/*

* 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:  ?Description

*

*/

#ifndef __MDERELATIONQUERY_H__

#define __MDERELATIONQUERY_H__

#include <mdequery.h>

/* Forward declarations. */

class CMdERelation;

class CMdENamespaceDef;

class CMdESession;

/**

 * Query that fetches a set of relation items from the metadata engine 

 * database.

 */

NONSHARABLE_CLASS(CMdERelationQuery) : public CMdEQuery

	{

public:

	/* Constructors and destructor. */

    /**

	 * Destructor.

	 */

	virtual ~CMdERelationQuery();

	/* Methods. */

    /**

	 * Returns one of the result objects.

	 *

	 * @return  The result object that was requested. The query retains 

     *          ownership of the returned object.

	 */

	IMPORT_C CMdERelation& Result(TInt aIndex) const;

protected:

	/* Constructors. */

	/**

	 * Constructor. 

	 *

	 * @param aType  type of the condition node

	 */

	CMdERelationQuery(CMdESession& aSession, CMdENamespaceDef& aNamespaceDef);

	/**

	 * Second-phase constructor.

	 */

	void RelationQueryConstructL();

    virtual void DoCancel();

private:

    /* Private methods. */

private:

    };

#endif  // __MDERELATIONQUERY_H__