/*

 * Copyright (c) 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: Interface for CA database implementations

 *

 */

#ifndef CASTORAGEPROXY_H

#define CASTORAGEPROXY_H

#include "caoperationparams.h"

// FORWARD DECLARATIONS

class CCaStorage;

class CCaInnerQuery;

class CCaInnerEntry;

class CCaLocalizationEntry;

class MCaSessionNorifier;

/**

 * Interface for CA database implementations.

 *

 */

class CCaStorageProxy: public CBase

    {

public:

    /**

     * Two-phased constructor.

     */

    static CCaStorageProxy* NewL();

    /**

     * Two-phased constructor.

     */

    static CCaStorageProxy* NewLC();

    /**

     * Destructor.

     */

    ~CCaStorageProxy();

    /**

     * Localizes one entry attribute

     *

     * @param aLocalization information about one localization row.

     */

    IMPORT_C void LocalizeEntryL( CCaLocalizationEntry& aLocalization );

    /**

     * Fetches localization data from database

     *

     * @param aResultContainer Target for results.

     */

    IMPORT_C void GetLocalizationsL( RPointerArray<CCaLocalizationEntry>& aResultContainer );

    /**

     * Fetches data from storage.

     * @param aQuery Query filter for entries to be fetched.

     * @param aResult Result entry container.

     */

    IMPORT_C void GetEntriesL( const CCaInnerQuery* aQuery, 

            RPointerArray<CCaInnerEntry>& aResultContainer );

    /**

     * Fetches entry ids from storage.

     * @param aQuery Query filter for entries' ids to be fetched.

     * @param aResultIdArray Result entry id array.

     */

    IMPORT_C void GetEntriesIdsL( const CCaInnerQuery* aQuery,

            RArray<TInt>& aResultIdArray );

    /**

     * Adds or Updates data to storage.

     * In case when data is added the input aEntry serves 

     * also as an output entry.

     * @param aEntry Entry data.

     * @param aUpdate is entry updated by a client

     */

    IMPORT_C void AddL( CCaInnerEntry* aEntry, TBool aUpdate = EFalse );

    /**

     * Removes entries from storage.

     * @param aEntryIds Ids of entries to be removed.

     */

    IMPORT_C void RemoveL( const RArray<TInt>& aEntryIds );

    /**

     * Organizes entries in storage.

     * @param aEntryIds Entry ids to be organized 

     * (insert, remove, append, prepend are possible).

     * @param aParams Organize parameters.

     */

    IMPORT_C void OrganizeL( const RArray<TInt>& aEntryIds,

            TCaOperationParams aParams );

    /**

     * Executes touch specific actions on storage. 

     * Should be called when e.g. entry is clicked.

     * @param aEntry entry to be touched

     */

    IMPORT_C void TouchL( CCaInnerEntry* aEntry );

    /**

     * Get database property on storage.

     *

     * @param aProperty The property to get.

     * @param aPropertyValue The value of property.

     */

    IMPORT_C void DbPropertyL( const TDesC& aProperty, TDes& aPropertyValue );

    /**

     * Set property action on storage.

     *

     * @param aProperty The property to set.

     * @param aPropertyValue The value of property.

     */

    IMPORT_C void SetDBPropertyL( const TDesC& aProperty, const TDesC& aPropertyValue );

    /**

     * Organizes data within a group in custom order in storage.

     *

     * @param aEntryIds Ids of entries in custom order.

     * @param aGroupId Group to sort.

     */

    IMPORT_C void CustomSortL( const RArray<TInt>& aEntryIds, const TInt aGroupId );

    /**

     * Add a session. Ownership not taken, this object only keeps a list of

     * sessions that are dependent on its engine.

     * @param aSession Session.

     */

    void AddSessionL( MCaSessionNorifier* aHandlerNotifier );

    /**

     * Remove a session. Safe to call if not added.

     * When no more sessions remain dependent on this object, timed

     * self-deletion is scheduled.

     */

    void RemoveSession( MCaSessionNorifier* aHandlerNotifier );

private:

    /**

     * Perform the second phase construction of a CCpStorageEngine object.

     */

    void ConstructL();

    /**

     * C++ default constructor.

     */

    CCaStorageProxy();

private:

    //Data

    /**

     * Data storage. Own.

     */

    CCaStorage* iStorage;

    /**

     * Sessions using this engine. Own.

     */

    RPointerArray<MCaSessionNorifier> iHandlerNotifier; 

    };

#endif //CASTORAGEPROXY_H