diff -r 7fdc9a71d314 -r 8ad140f3dd41 hti/PC_Tools/HTIGateway/HtiGateway/src/plugin.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hti/PC_Tools/HTIGateway/HtiGateway/src/plugin.cpp	Wed Oct 13 16:17:58 2010 +0300
@@ -0,0 +1,135 @@
+/*
+* 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
\ No newline at end of file