// Copyright (c) 2005-2009 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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//+
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+
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#ifndef EXCHANGE_H+
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#define EXCHANGE_H+
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+
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#include <bt_sock.h>+
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#include <btsdp.h>+
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+
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class CExchanger : public CBase+
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/**+
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Abstract base class for protocols that can locate compatible devices.+
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@internalComponent+
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*/+
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{+
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	public:+
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		/**+
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		@internalComponent+
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		Begins a search for compatible devices.  Until successful+
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		completion, no other function should be called as the data+
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		may be invalid.+
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		@param aStatus+
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		A TRequestStatus object that is signalled when the search+
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		completes.  It should be used from within an active object+
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		*/+
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		virtual void LookForPeersL(TRequestStatus& aStatus) = 0;+
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		/**+
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		@internalComponent+
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		@return The number of compatible peer devices found+
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		*/+
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		virtual TInt Count() = 0;+
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		/**+
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		@internalComponent+
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		Selects the first compatible device that was found+
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		*/+
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		virtual void First() = 0;+
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		/**+
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		@internalComponent+
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		Retrieves the selected device, and selects the next device+
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		that was found.+
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		@param aPtr+
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		A reference to a TNameEntry* pointer.  On success, it is filled+
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		in with a pointer to a device that was found.  +
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		@return KErrNotFound on failure, KErrNone on success.+
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		*/+
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		virtual TInt Next(TNameEntry*& aPtr) = 0;+
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	protected:+
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		RSocketServ iSockSession;+
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	private:+
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};+
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+
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class CBluetoothSeeker;+
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class CBluetoothExchanger : public CExchanger+
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/**+
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@internalComponent+
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Implementation of CExchanger for bluetooth.  Uses inquiry and the SDP +
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protocol to retrieve a filtered list of all devices in range that support+
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the service, as defined by UUID+
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*/+
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{+
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	public:+
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		IMPORT_C static CBluetoothExchanger* NewL(const TUUID &aUUID);+
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		IMPORT_C static CBluetoothExchanger* NewLC(const TUUID &aUUID);+
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		~CBluetoothExchanger();+
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		//virtual implementations+
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		IMPORT_C virtual void LookForPeersL(TRequestStatus& aStatus);+
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		IMPORT_C virtual TInt Count();+
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		IMPORT_C virtual void First();+
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		IMPORT_C virtual TInt Next(TNameEntry*& aPtr);+
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	private:+
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		void ConstructL(const TUUID &aUUID);+
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		RSdp iSdpSession;+
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		RSdpDatabase iSdpDb;+
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		CBluetoothSeeker *iSeeker;+
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		TInt iDeviceIndex;+
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};+
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+
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#endif //EXCHANGE_H+
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