/*

* 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:

*   This file contains the header file of the Plugin, FrontendPlugin,

*	CommChannelPlugin and CommChannelPluginObserver classes and implementation

*	of DummyCommObserver.

*/

// INCLUDES

#include "plugin.h"

#include "util.h"

#include "serialcommplugin.h"

#include "IPCommPlugin.h"

extern DWORD g_ErrorCode;

//**********************************************************************************

// Class Plugin

//

//**********************************************************************************

Plugin::Plugin()

{

	Init();

}

DWORD Plugin::Init()

{

	m_Name = "NULL Plugin";

	return NO_ERRORS;

}

const string& Plugin::GetName(string *name)

{

	if (name != NULL)

	{

		*name = m_Name;

	}

	return m_Name;

}

//**********************************************************************************

// Class CommChannelPlugin

//

// This class is the parent class of all communication channel plugins used

// in DataGateway.

//**********************************************************************************

CommChannelPlugin* CommChannelPlugin::m_Self = NULL;

/*

 * This method creates instance of specified plugin  

 */

CommChannelPlugin* CommChannelPlugin::Instance(const string& pluginname,

											   const CommChannelPluginObserver* observer)

{

	if (m_Self == NULL)

	{

		if (pluginname.compare("SERIAL") == 0 )

		{

			m_Self = new SerialCommPlugin(observer);

		}

		else if (pluginname.compare("IPCOMM") == 0 )

		{

			m_Self = new IPCommPlugin(observer);

		}

		else

		{

			string err = "Error when creating communication channel plugin.\n";

			err += "Unknown plugin '" + pluginname + "'";

			Util::Error(err);

			m_Self = NULL;

			g_ErrorCode = ERR_DG_UNKNOWN_COMMCHANNEL;

		}

	}

	return m_Self;

}

/*

 * This method initializes and connects the instance of plugin

 */

DWORD CommChannelPlugin::Connect()

{

	if (m_Self == NULL) return ERR_DG_UNINITIALISED_COMMCHANNEL;

	DWORD res;

	if ((res = m_Self->Init()) != NO_ERRORS) return res;

	return m_Self->Open();

}

/*

 * This method closes and deletes the instance of plugin

 */

DWORD CommChannelPlugin::Disconnect()

{

	if (m_Self == NULL) return ERR_DG_UNINITIALISED_COMMCHANNEL;

	Util::Info("[DataGateway] Waiting Communication Channel Plugin to shutdown");

	m_Self->Close();

	delete m_Self;

	m_Self = NULL;

	return NO_ERRORS;

}

CommChannelPlugin::CommChannelPlugin(const CommChannelPluginObserver* observer)

	: Plugin()

{

	if (observer == NULL)

	{

		m_Observer = new DummyCommObserver;

	}

	else

	{

		m_Observer = observer;

	}

}

DWORD CommChannelPlugin::Init()

{

	DWORD res;

	res = Plugin::Init();

	m_Open = false;

	return res;

}

// End of the file