/*+
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). +
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* All rights reserved.+
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* This component and the accompanying materials are made available+
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* under the terms of "Eclipse Public License v1.0"+
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* which accompanies this distribution, and is available+
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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*+
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* Initial Contributors:+
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* Nokia Corporation - initial contribution.+
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*+
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* Contributors:+
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* +
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* Description:+
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*   This file contains the header file of the Plugin, FrontendPlugin,+
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*	CommChannelPlugin and CommChannelPluginObserver classes and implementation+
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*	of DummyCommObserver.+
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*/+
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+
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// INCLUDES+
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#include "plugin.h"+
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#include "util.h"+
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#include "serialcommplugin.h"+
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#include "IPCommPlugin.h"+
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+
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extern DWORD g_ErrorCode;+
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+
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//**********************************************************************************+
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// Class Plugin+
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//+
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//**********************************************************************************+
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+
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Plugin::Plugin()+
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{+
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	Init();+
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}+
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+
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DWORD Plugin::Init()+
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{+
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	m_Name = "NULL Plugin";+
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	return NO_ERRORS;+
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}+
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+
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const string& Plugin::GetName(string *name)+
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{+
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	if (name != NULL)+
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	{+
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		*name = m_Name;+
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	}+
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	return m_Name;+
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}+
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+
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//**********************************************************************************+
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// Class CommChannelPlugin+
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//+
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// This class is the parent class of all communication channel plugins used+
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// in DataGateway.+
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//**********************************************************************************+
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+
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CommChannelPlugin* CommChannelPlugin::m_Self = NULL;+
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+
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/*+
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 * This method creates instance of specified plugin  +
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 */+
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CommChannelPlugin* CommChannelPlugin::Instance(const string& pluginname,+
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											   const CommChannelPluginObserver* observer)+
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{+
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	if (m_Self == NULL)+
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	{+
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		if (pluginname.compare("SERIAL") == 0 )+
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		{+
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			m_Self = new SerialCommPlugin(observer);+
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		}+
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		else if (pluginname.compare("IPCOMM") == 0 )+
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		{+
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			m_Self = new IPCommPlugin(observer);+
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		}+
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		else+
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		{+
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			string err = "Error when creating communication channel plugin.\n";+
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			err += "Unknown plugin '" + pluginname + "'";+
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			Util::Error(err);+
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			m_Self = NULL;+
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			g_ErrorCode = ERR_DG_UNKNOWN_COMMCHANNEL;+
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		}+
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	}+
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	return m_Self;+
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}+
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+
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/*+
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 * This method initializes and connects the instance of plugin+
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 */+
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DWORD CommChannelPlugin::Connect()+
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{+
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	if (m_Self == NULL) return ERR_DG_UNINITIALISED_COMMCHANNEL;+
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	DWORD res;+
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	if ((res = m_Self->Init()) != NO_ERRORS) return res;+
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	return m_Self->Open();+
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}+
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+
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/*+
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 * This method closes and deletes the instance of plugin+
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 */+
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DWORD CommChannelPlugin::Disconnect()+
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{+
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	if (m_Self == NULL) return ERR_DG_UNINITIALISED_COMMCHANNEL;+
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	Util::Info("[DataGateway] Waiting Communication Channel Plugin to shutdown");+
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	m_Self->Close();+
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	delete m_Self;+
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	m_Self = NULL;+
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	return NO_ERRORS;+
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}+
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+
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CommChannelPlugin::CommChannelPlugin(const CommChannelPluginObserver* observer)+
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	: Plugin()+
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{+
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	if (observer == NULL)+
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	{+
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		m_Observer = new DummyCommObserver;+
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	}+
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	else+
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	{+
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		m_Observer = observer;+
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	}+
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}+
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+
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DWORD CommChannelPlugin::Init()+
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{+
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	DWORD res;+
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	res = Plugin::Init();+
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	m_Open = false;+
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	return res;+
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}+
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+
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// End of the file+
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