/*

* Copyright (c) 2006-2007 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:  Identifies a contact in cache pools

*

*/

#ifndef C_PCS_ALGORITHM_2_MULTI_SEARCH_HELPER

#define C_PCS_ALGORITHM_2_MULTI_SEARCH_HELPER

// SYSTEM INCLUDES

#include <e32cmn.h>

#include <e32math.h>

// USER INCLUDES

#include "CPsData.h"

#include "CPcsCache.h"

#include "CPcsKeyMap.h"

#include "CPsQuery.h"

#include "CPcsAlgorithm2.h"

#include "CPcsDebug.h"

#include "CPcsKeyMap.h"

#include "CPsQueryItem.h"

#include "CPcsPoolElement.h"

#include "CWords.h"

#include "CPcsAlgorithm2FilterHelper.h"

// FORWARD DECLARATION

class CPcsAlgorithm2;

class CPsData;

class CPsQuery;

class TMultiSearchMap;

#define MAX_DATA_FIELDS 8

// CLASS DECLARATION

class CPcsAlgorithm2MultiSearchHelper : public CBase

    {

public:

    /**

     * Two phase construction

     */

    static CPcsAlgorithm2MultiSearchHelper* NewL(CPcsAlgorithm2* aAlgorithm);

    /**

     * Destructor

     */

    virtual ~CPcsAlgorithm2MultiSearchHelper();

private:

    /**

     * Filter subset results for multi query mode. 

     */

    void FilterResultsMultiL(CPcsAlgorithm2FilterHelper* aAlgorithmFilterHelper,

public:

    /**

     * Search Function for multi query

     * Initials search feature

     */

    /**

     * Funtion to Search matching sequences for multi query

     */

    void SearchMatchSeqMultiL(RPointerArray<CPsQuery>& aPsQuery,

                              RArray<TPsMatchLocation>& aMatchLocation);

private:

    /**

     * Set the bits corresponding to word matches

     *

     * @param aIndex Index of data element

     * @param aPosition Word matched for predictive search

     */

    void SetWordMap(TInt aIndex, TInt aPosition);

    /**

     * Checks if data at data index and word at word index

     * is matched for predictive search

     *

     * @param aDataIndex Index of data element

     * @param aWordIndex Word index

     * @return TRUE if word matched else FALSE

     */

    TBool IsWordMatch(TInt aDataIndex, TInt aWordIndex);

    /**

     * Resets iWordMatches member variable

     */

    void ClearWordMatches();

public:

    /**

     * Utility function that counts no of bit set in 32 bit number

     */

    TInt BitsSet32(TUint32 aData);

    /**

     * Utility function to split the query into multiple queries

     */

    RPointerArray<CPsQuery> MultiQueryL(CPsQuery& aQuery);

private:

    /**

     * Constructor

     */

    CPcsAlgorithm2MultiSearchHelper();

    /**

     * 2nd phase construtor

     */

    void ConstructL(CPcsAlgorithm2* aAlgorithm);

private:

    /**

     * Pointer to algorithm instance. Not owned.

     */

    CPcsAlgorithm2* iAlgorithm;

    /**

     * Pointer to key map instance. Not owned.

     */

    /**

     * Array of result sets from different data stores.

     */

    typedef RPointerArray<CPsData> CPSDATA_R_PTR_ARRAY;

    RPointerArray<CPSDATA_R_PTR_ARRAY> iMultiSearchResultsArr;

    /**

     * Array of word macthes.

     */

    TUint8 iWordMatches[MAX_DATA_FIELDS];

    };

#endif // C_PCS_ALGORITHM_2_MULTI_SEARCH_HELPER