// Copyright (c) 2001-2009 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:

// @file

// This file contains the definition of the CMDXMLParserFileDataSource class

// which is responsible for feeding the data source interface from a given XML file.

// The headers for this class exist in the XMLParser.h header file so that the old

// file-based interface can be implemented using the data source API without removing

// source compatibility for older code.

// 

//

#include <f32file.h>

#include <gmxmlparser.h>

#include "GMXMLFileDataSource.h"

CMDXMLParserFileDataSource *CMDXMLParserFileDataSource::NewLC(RFs aRFs, const TDesC& aFileToParse)

	{

	CMDXMLParserFileDataSource* self = new (ELeave) CMDXMLParserFileDataSource();

	CleanupStack::PushL(self);

	self->ConstructL(aRFs, aFileToParse);

	return self;

	}

CMDXMLParserFileDataSource *CMDXMLParserFileDataSource::NewL(RFs aRFs, const TDesC& aFileToParse)

	{

	CMDXMLParserFileDataSource *self = NewLC(aRFs, aFileToParse);

	CleanupStack::Pop();

	return self;

	}

CMDXMLParserFileDataSource* CMDXMLParserFileDataSource::NewL(RFile& aFileHandleToParse)

	{

	CMDXMLParserFileDataSource* me = new(ELeave) CMDXMLParserFileDataSource();

	CleanupStack::PushL(me);

	me->ConstructL(aFileHandleToParse);

	CleanupStack::Pop(me);

	return me;

	}

void CMDXMLParserFileDataSource::ConstructL(RFile& aFileHandleToParse)

	{ 

	// take ownership of file handle

	iXMLFile = aFileHandleToParse;

	// Calculate size of file

	TInt fileSize;

	User::LeaveIfError(iXMLFile.Size(fileSize));

	// make buffer

	iXMLFileBuffer = HBufC8::NewL(fileSize);

	TPtr8 tmpbuffer(iXMLFileBuffer->Des());

	// read file into buffer

	User::LeaveIfError(iXMLFile.Read(tmpbuffer, fileSize));

	iState = KInit;

	iXMLFile.Close();

	}	

CMDXMLParserFileDataSource::~CMDXMLParserFileDataSource()

	{

	iXMLFile.Close();

	delete iXMLFileBuffer;

	}

CMDXMLParserFileDataSource::CMDXMLParserFileDataSource() : iState(KError), iXMLFileBuffer(0)

	{

	}

void CMDXMLParserFileDataSource::ConstructL(RFs aRFs, const TDesC& aFileToParse)

	{ 

	User::LeaveIfError(iXMLFile.Open(aRFs, aFileToParse, EFileRead | EFileShareReadersOnly));

	// Calculate size of file

	TInt fileSize;

	User::LeaveIfError(iXMLFile.Size(fileSize));

	// make buffer

	iXMLFileBuffer = HBufC8::NewLC(fileSize);

	TPtr8 tmpbuffer(iXMLFileBuffer->Des());

	// read file into buffer

	User::LeaveIfError(iXMLFile.Read(tmpbuffer, fileSize));

	iState = KInit;

	iXMLFile.Close();

	CleanupStack::Pop();	// memory buffer

	}

void CMDXMLParserFileDataSource::GetData(TPtrC8 &aPtr, TRequestStatus &aStatus)

	{

	TRequestStatus *s = &aStatus;

	switch(iState)

		{

	case KInit:

		aPtr.Set(iXMLFileBuffer->Des());

		iState = KDataSent;

		User::RequestComplete(s, KMoreData);

		break;

	case KDataSent:

		delete iXMLFileBuffer;

		iXMLFileBuffer = 0;

		iState = KDone;

		User::RequestComplete(s, KDataStreamEnd);

		break;

	case KDone:

		User::RequestComplete(s, KDataStreamEnd);

		break;

	default:

		User::RequestComplete(s, KDataStreamError);

		break;

		};

	}

void CMDXMLParserFileDataSource::Disconnect()

	{

	delete iXMLFileBuffer;

	iXMLFileBuffer = 0;

	iState = KDone;

	}

// End of File