/*

* Copyright (c) 2007 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:  Used to cache the contacts in memory

*

*/

#ifndef __CPCS_CACHE_ALGORITHM2_H__

#define __CPCS_CACHE_ALGORITHM2_H__

// INCLUDE FILES

#include <e32base.h>

#include <e32hashtab.h>

#include "CPsData.h"

#include "CPcsKeyMap.h"

#include "CPcsPoolElement.h"

#include "TCacheInfo.h"

#include "CPcsDefs.h"

class CPcsAlgorithm2;

// CLASS DECLARATION

class CPcsCache : public CBase

    {

public:

    /**

     * Two phase construction

     */

                           CPcsKeyMap& aKeyMap, TUint8 aUriId);

    /**

     * Virtual destructor

     */

    virtual ~CPcsCache();

    /**

     * Returns the database URI this cache support

     */

    TDesC& GetURI();

    /**

     * Get CPcsPoolElement for a key id

     */

    void GetContactsForKeyL(TInt aKeyId, RPointerArray<CPcsPoolElement>& aData);

    /**

     * Get all cached content

     */

    void GetAllContentsL(RPointerArray<CPsData>& aData);

    /**

     * Add a data element to the cache

     */

    void AddToCacheL(CPsData& aData);

    /**

     * Removes a data element from the cache

     */

    void RemoveFromCacheL(TInt aItemId);

    /**

     * Removes all data elements from the cache

     */

    /**

     * Sets data fields to the cache

     */

    void SetDataFields(RArray<TInt>& aDataFields);

    /**

     * Gets data fields from the cache

     */

    void GetDataFields(RArray<TInt>& aDataFields);

    /**

     * Updates the caching status for this cache

     */

    void UpdateCacheStatus(TInt aStatus);

    /**

     * Returns the cache status for this cache

     */

    TInt GetCacheStatus();

    /**

     * Returns the UriId

     */

    TUint8 GetUriId();

    /**

     * Returns the URI for this cache

     */

    HBufC* GetUri();

    /**

     * Sets sort order for data fields

     */

    void SetSortOrder(RArray<TInt>& aSortOrder);

    /**

     * Gets sort order for data fields

     */

    void GetSortOrder(RArray<TInt>& aSortOrder);

    /**

     * Get the index order corresponding to the sort order

     */

    void GetIndexOrder(RArray<TInt>& aIndexOrder);

    /**

     * Resort data according to the new sortorder

     */

    void ResortdataInPoolsL();

private:

    /**

     * Constructor

     */

    CPcsCache();

    /**

     * Second phase constructor

     */

                    CPcsKeyMap& aKeyMap, TUint8 aUriId);

    /**

     * Utility function to add a contact to the pool

     */

    /**

     * Utility function 

     */

    /**

     */

    /**

     * Utility function

     */

    void ComputeIndexOrder();

private:

    CPcsAlgorithm2* iAlgorithm;

    /*

     * Array of key maps

     */

    typedef RPointerArray<CPcsPoolElement> R_PTR_ARRAY;

    /*

     * Hashmaps to remember the location of a contact in the pools

     */

    /*

     * Master pool of all contacts in this cache

     */

    /*

    * Master pool backup of all contacts in this cache when sortorder changed

    */

    /*

     * Not owned

     */

    /**

     * Owned. Refer to the database URI this cache is for.

     */

    HBufC* iURI;

    /**

     * Internal URI id for this cache

     */

    TInt8 iUriId;

    /**

     * Current status of this cache

     */

    TInt iCacheStatus;

    /**

     * List of data fields (mapped to VPbk ids) supported by this cache

     */

    RArray<TInt> iDataFields;

    /**

     * Sort order of data fields expected by the clients

     */

    RArray<TInt> iSortOrder;

    /**

     * Order of indexes determined by correlating iDataFields and iSortOrder

     * Each CPsData data element fields need to be compared in this order

     * to get the client expected sort order for this cache.

     */

    RArray<TInt> iIndexOrder;

    };

#endif // __CPCS_CACHE_ALGORITHM2_H__

// End of file