// Copyright (c) 1997-2009 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:

//

#include "VersitAdditionalStorage.h"

#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

#include "versit_internal.h"

#endif

// User includes

#include <versit.h>

// Constants

const TInt KVersitAdditionalStorageArrayGranularity = 2;

class TVersitAdditionalStorageItem

/** 

@internalComponent

@released

*/

    {

public:

    inline TVersitAdditionalStorageItem(const TAny* aKey, CBase* aValue)

    :   iKey(aKey), iValue(aValue)

        {

        }

public:

    const TAny* iKey;

    CBase* iValue;

    };

CVersitAdditionalStorage::CVersitAdditionalStorage()

:   iStorage(KVersitAdditionalStorageArrayGranularity)

    {

    }

CVersitAdditionalStorage::~CVersitAdditionalStorage()

    {

    const TInt count = iStorage.Count();

    for(TInt i=0; i<count; i++)

        {

        TVersitAdditionalStorageItem& item = iStorage[i];

        delete item.iValue;

        }

    iStorage.Close();

    }

CVersitAdditionalStorage* CVersitAdditionalStorage::NewL()

    {

    return new(ELeave) CVersitAdditionalStorage();

    }

void CVersitAdditionalStorage::AddToStorageL(const TAny* aKey, CBase* aValue)

    {

    __ASSERT_ALWAYS(aValue != NULL, Panic(EVersitPanicNullValueAssignedToAdditionalStorageSlot));

    // Check if an additional value has already been stored for this item

    CBase* value = FromStorage(aKey);

    __ASSERT_ALWAYS(value == NULL, Panic(EVersitPanicAdditionalStorageSlotAlreadyInUse));

    // Create new item

    TVersitAdditionalStorageItem newItem(aKey, aValue);

    User::LeaveIfError(iStorage.Append(newItem));

    }

CBase* CVersitAdditionalStorage::FromStorage(const TAny* aKey)

    {

    CBase* value = NULL;

    TInt index = KErrNotFound;

    TVersitAdditionalStorageItem* item = ItemByKey(aKey, index);

    if  (item)

        {

        value = item->iValue;

        }

    return value;

    }

void CVersitAdditionalStorage::FreeStorage(const TAny* aKey)

    {

    TInt index = KErrNotFound;

    TVersitAdditionalStorageItem* item = ItemByKey(aKey, index);

    if  (item)

        {

        delete item->iValue;

        iStorage.Remove(index);

        }

    }

TVersitAdditionalStorageItem* CVersitAdditionalStorage::ItemByKey(const TAny* aKey, TInt& aIndex)

    {

    TVersitAdditionalStorageItem* foundItem = NULL;

    TVersitAdditionalStorageItem searchFor(aKey, NULL);

    TIdentityRelation<TVersitAdditionalStorageItem> relation(ItemsMatch);

    //

    aIndex = iStorage.Find(searchFor, relation);

    if  (aIndex >= 0)

        {

        foundItem = &iStorage[aIndex];

        }

    //

    return foundItem;

    }

TBool CVersitAdditionalStorage::ItemsMatch(const TVersitAdditionalStorageItem& aLeft, const TVersitAdditionalStorageItem& aRight)

    {

    return aLeft.iKey == aRight.iKey;

    }