/*

* Copyright (c) 2006 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:  Utility class for impementing Parent/Child class

*

*/

#include "ParentChildIntfc.h"

CParentIntfc::~CParentIntfc()

    {

    TInt count = iChildrenList.Count();

    CChildIntfc* childPtr(NULL);

    for (TInt index(0); index < count; index++)

        {

        if (GetChild(index, childPtr) == KErrNone)

            {

            childPtr->ParentDeleted(*((CParentIntfc*)this));

            }

        }

    iChildrenList.Close();

    }

TInt CParentIntfc::GetChildCount()

    {

    return iChildrenList.Count();

    }

TInt CParentIntfc::GetChild( TInt aIndex, CChildIntfc*& aChild )

    {

    TInt status(KErrArgument);

    if ( (0 <= aIndex ) && ( aIndex < iChildrenList.Count() ) )

        {

        aChild = iChildrenList[aIndex];

        status = KErrNone;

        }

    return status;

    }

TInt CParentIntfc::SetChild( CChildIntfc& aChild )

    {

    TInt status(KErrAlreadyExists);

    if ( iChildrenList.Find(&aChild) == KErrNotFound )

        {

        status = iChildrenList.Append(&aChild);

        }

    return status;

    }

void CParentIntfc::ChildDeleted( CChildIntfc& aChild )

    {

    TInt index(iChildrenList.Find(&aChild));

    if ( index != KErrNotFound )

        {

        iChildrenList.Remove(index);

        }

    }

CChildIntfc::~CChildIntfc()

    {

    if ( iParent )

        {

        iParent->ChildDeleted(*((CChildIntfc*)this));

        }

    }

void CChildIntfc::ParentDeleted( CParentIntfc& aParent )

    {

    if ( iParent == &aParent )

        {

        iParent = NULL;

        }

    }

TInt CChildIntfc::GetParent( CParentIntfc*& aParent )

    {

    TInt status(KErrNotFound);

    if ( iParent )

        {

        aParent = iParent;

        status = KErrNone;

        }

    return status;

    }

TInt CChildIntfc::SetParent( CParentIntfc& aParent )

    {

    TInt status(KErrAlreadyExists);

    if ( !iParent )

        {

        iParent = &aParent;

        status = KErrNone;

        }

    return status;

    }

// End of file