/*

* 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:   ?Description

*

*/

#include <bt_sock.h>

#include "SdpAttributeParser.h"

#include "SdpAttributeParser.pan"

#include "SdpAttributeNotifier.h"

TSdpAttributeParser::TSdpAttributeParser(

    TSdpAttributeList& aNodeList, 

    MSdpAttributeNotifier& aObserver

) 

:   iObserver(aObserver),

    iNodeList(aNodeList),

    iCurrentNodeIndex(0)

    {

    // no implementation required

    }

TBool TSdpAttributeParser::HasFinished() const

    {

    return CurrentNode().iCommand == EFinished;

    }

void TSdpAttributeParser::VisitAttributeValueL(CSdpAttrValue& aValue, TSdpElementType aType)

    {

    switch(CurrentNode().iCommand)

        {

        case ECheckType:

            CheckTypeL(aType);

            break;

        case ECheckValue:

            CheckTypeL(aType);

            CheckValueL(aValue);

            break;

        case ECheckEnd:

            User::Leave(KErrGeneral);   //  list element contains too many items

            break;

        case ESkip:

            break;  // no checking required

        case EReadValue:

            CheckTypeL(aType);

            ReadValueL(aValue);

            break;

        case EFinished:

            User::Leave(KErrGeneral);   // element is after value should have ended

            return;

        default:

            Panic(ESdpAttributeParserInvalidCommand);

        }

    AdvanceL();

    }

void TSdpAttributeParser::StartListL(CSdpAttrValueList& /*aList*/)

    {

    // no checks done here

    }

void TSdpAttributeParser::EndListL()

    {

    // check we are at the end of a list

    if (CurrentNode().iCommand != ECheckEnd)

        {

        User::Leave(KErrGeneral);

        }

    AdvanceL();

    }

void TSdpAttributeParser::CheckTypeL(TSdpElementType aElementType) const

    {

    if (CurrentNode().iType != aElementType)

        {

        User::Leave(KErrGeneral);

        }

    }

void TSdpAttributeParser::CheckValueL(CSdpAttrValue& aValue) const

    {

    switch(aValue.Type())

        {

        case ETypeNil:

            Panic(ESdpAttributeParserNoValue);

            break;

        case ETypeUint:

            if (aValue.Uint() != (TUint)CurrentNode().iValue)

                {

                User::Leave(KErrArgument);

                }

            break;

        case ETypeInt:

            if (aValue.Int() != CurrentNode().iValue)

                {

                User::Leave(KErrArgument);

                }

            break;

        case ETypeBoolean:

            if (aValue.Bool() != CurrentNode().iValue)

                {

                User::Leave(KErrArgument);

                }

            break;

        case ETypeUUID:

            if (aValue.UUID() != TUUID(CurrentNode().iValue))

                {

                User::Leave(KErrArgument);

                }

            break;

        // these are lists, so have to check contents

        case ETypeDES:

        case ETypeDEA:

            Panic(ESdpAttributeParserValueIsList);

            break;

        // these aren't supported - use EReadValue and leave on error

        //case ETypeString:

        //case ETypeURL:

        //case ETypeEncoded:

        default:

            Panic(ESdpAttributeParserValueTypeUnsupported);

            break;

        }

    }

void TSdpAttributeParser::ReadValueL(CSdpAttrValue& aValue) const

    {

    iObserver.FoundElementL(CurrentNode().iValue, aValue);

    }

const TSdpAttributeParser::SSdpAttributeNode& TSdpAttributeParser::CurrentNode() const

    {

    return  iNodeList[iCurrentNodeIndex];

    }

void TSdpAttributeParser::AdvanceL()

    {

    // check not at end

    if (CurrentNode().iCommand == EFinished)

        {

        User::Leave(KErrEof);

        }

    // move to the next item

    ++iCurrentNodeIndex;

    }