diff -r 7fdc9a71d314 -r 8ad140f3dd41 hti/PC_Tools/DataGateway/INC/plugin.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hti/PC_Tools/DataGateway/INC/plugin.h	Wed Oct 13 16:17:58 2010 +0300
@@ -0,0 +1,148 @@
+/*
+* 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 headers of Plugin, FrontendPlugin,
+*	CommChannelPlugin and CommChannelPluginObserver classes and implementation
+*	of DummyCommObserver.
+*/
+
+#ifndef PLUGIN_H
+#define PLUGIN_H
+
+#pragma warning ( disable : 4786 )
+
+#include <string>
+#include "common.h"
+
+using namespace std;
+
+//**********************************************************************************
+// Class Plugin
+//
+//**********************************************************************************
+
+class Plugin
+{
+public:
+	enum PluginType { null, dummy, frontend, comm_channel };
+
+public:
+	virtual PluginType GetType() { return null; }
+	virtual DWORD Init();
+	virtual const string& GetName(string *name = NULL);
+
+protected:
+	Plugin();
+
+protected:
+	string m_Name;
+};
+
+//**********************************************************************************
+// Class FrontendPlugin
+//
+//**********************************************************************************
+
+class FrontendPlugin : public Plugin
+{
+public:
+	virtual PluginType GetType() { return frontend; }
+	virtual DWORD Init();
+};
+
+//**********************************************************************************
+// Class CommChannelPluginObserver
+//
+//**********************************************************************************
+
+class CommChannelPluginObserver
+{
+public:
+	virtual void NotifyDataAvailable() = 0;
+	virtual void NotifyCommChannelOpened() = 0;
+	virtual void NotifyCommChannelClosed() = 0;
+};
+
+//**********************************************************************************
+// Class DummyCommObserver
+//
+//**********************************************************************************
+
+class DummyCommObserver : public CommChannelPluginObserver
+{
+public:
+	void NotifyDataAvailable() { };
+	void NotifyCommChannelOpened() { };
+	void NotifyCommChannelClosed() { };
+};
+
+//**********************************************************************************
+// Class CommChannelPlugin
+//
+// This class is the parent class of all communication channel plugins used
+// in DataGateway.
+//**********************************************************************************
+
+class CommChannelPlugin : public Plugin
+{
+public:
+	PluginType GetType() { return comm_channel; }
+	virtual DWORD Init();
+	virtual DWORD Open() = 0;
+	virtual bool IsOpen() { return m_Open; }
+	/*
+	 * This method closes and deletes the instance of plugin
+	 */
+	virtual DWORD Close() = 0;
+	/*
+	 * This method is used to send Data object and Receive Data object
+	 */
+	virtual DWORD SendReceive(Data* data_in, Data** data_out, long timeout = 5000) = 0;
+	/*
+	 * This method is used to send Data object
+	 */
+	virtual DWORD Send(Data* data_in, long timeout = 5000) = 0;
+	/*
+	 * This method is used to receive Data object
+	 */
+	virtual DWORD Receive(Data** data_out, long timeout = 5000) = 0;
+	/*
+	 * This method creates instance of specified plugin  
+	 */
+	static CommChannelPlugin* Instance(const string& pluginname,
+		                               const CommChannelPluginObserver* observer = NULL);
+	/*
+	 * This method initializes and connects the instance of plugin
+	 */
+	static DWORD Connect();
+	/*
+	 * This method closes and deletes the instance of plugin
+	 */
+	static DWORD Disconnect();
+
+protected:
+	CommChannelPlugin(const CommChannelPluginObserver* observer = NULL);
+	const CommChannelPluginObserver* GetObserver() { return m_Observer; }
+
+protected:
+	const CommChannelPluginObserver* m_Observer;
+	bool m_Open;
+
+private:
+	static CommChannelPlugin* m_Self;
+};
+
+#endif
+
+// End of the file
\ No newline at end of file