/*

* Copyright (c) 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:  Reads selected parts of SDP attribute values.

*

*/

// INCLUDE FILES

#include <bt_sock.h>

#include "SdpAttributeParser.h"

#include "SdpAttributeParser.pan"

#include "SdpAttributeNotifier.h"

// ============================ MEMBER FUNCTIONS ==============================

// ----------------------------------------------------------------------------

// TSdpAttributeParser::TSdpAttributeParser()

// Construct a TSdpAttributeParser.

// ----------------------------------------------------------------------------

//

TSdpAttributeParser::TSdpAttributeParser(

    TSdpAttributeList& aNodeList,

    MSdpAttributeNotifier& aObserver

)

:   iObserver( aObserver ),

    iNodeList( aNodeList ),

    iCurrentNodeIndex( 0 )

    {

    // no implementation required

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::HasFinished()

// Check if parsing processed the whole list.

// ----------------------------------------------------------------------------

//

TBool TSdpAttributeParser::HasFinished() const

    {

    return CurrentNode().iCommand == EFinished;

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::VisitAttributeValueL()

// Process a data element.

// ----------------------------------------------------------------------------

//

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

            return;                     // value should have ended

        default:

            Panic( ESdpAttributeParserInvalidCommand );

        }

    AdvanceL();

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::StartListL()

// Process the start of a data element list.

// ----------------------------------------------------------------------------

//

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

    {

    // no checks done here

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::EndListL()

// Process the end of a data element list.

// ----------------------------------------------------------------------------

//

void TSdpAttributeParser::EndListL()

    {

    // check we are at the end of a list

    if ( CurrentNode().iCommand != ECheckEnd )

        {

        User::Leave( KErrGeneral );

        }

    AdvanceL();

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::CheckTypeL()

// Check the type of the current node is the same as the specified type.

// ----------------------------------------------------------------------------

//

void TSdpAttributeParser::CheckTypeL( TSdpElementType aElementType ) const

    {

    if ( CurrentNode().iType != aElementType )

        {

        User::Leave( KErrGeneral );

        }

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::CheckValueL()

// Check the value of the current node is the same as the specified type.

// ----------------------------------------------------------------------------

//

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;

        }

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::ReadValueL()

// Pass the data element value to the observer.

// ----------------------------------------------------------------------------

//

void TSdpAttributeParser::ReadValueL( CSdpAttrValue& aValue ) const

    {

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

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::CurrentNode()

// Get the current node.

// ----------------------------------------------------------------------------

//

const TSdpAttributeParser::SSdpAttributeNode& TSdpAttributeParser

::CurrentNode() const

    {

    return  iNodeList[iCurrentNodeIndex];

    }

// ----------------------------------------------------------------------------

// TSdpAttributeParser::AdvanceL()

// Advance to the next node.

// ----------------------------------------------------------------------------

//

void TSdpAttributeParser::AdvanceL()

    {

    // check not at end

    if ( CurrentNode().iCommand == EFinished )

        {

        User::Leave( KErrEof );

        }

    // move to the next item

    ++iCurrentNodeIndex;

    }

// End of File