1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 /**

    17  @file

    18  @internalTechnology

    19 */

    20 

    21 #ifndef __NETSUBSCRIBE_H_

    22 #define __NETSUBSCRIBE_H_

    23 

    24 #include <e32base.h>

    25 #include <e32std.h>

    26 #include <elements/metadata.h>

    27 

    28 namespace NetSubscribe

    29 {

    30 /**

    31  * Maximum length(in bytes) of TEvent data part supported by NetSubscribe. 

    32  * The length is returned by SMetaData::Length()

    33  *

    34  * @see SMetaData

    35  */

    36 const TInt KMaxLength = 128;

    37 const TInt KTransportUid = 0x102055AA;

    38 enum ETransportTypes

    39 	{

    40 	/**

    41 	 * Publish/Subscribe Transport type

    42 	 */

    43 	EPublishSubscribe

    44 	//Another transport types should follow here

    45 	};

    46 	

    47 class TEventClientData;

    48 struct SSignalId;

    49 class TEventBase;

    50 class XSignal;

    51 class CNetSubscribe : public CBase

    52 /**

    53  * Client side of the signal subscription library. The class abstracts the mechanism the signals are

    54  * registered, trapped and the way event data are marhalled/demarshalled.

    55  * Derived class manages specific signal source & transport layer

    56  * Allows for multiple signal to be registered.

    57  *

    58  * @see XSignal

    59  *	@internalTechnology

    60  */

    61 	{

    62 	friend class TEvent;

    63 	

    64 public:

    65 	IMPORT_C static CNetSubscribe* NewL( const Meta::STypeId& aTransportId );

    66 	

    67 	IMPORT_C ~CNetSubscribe();

    68 

    69 protected:

    70 	explicit CNetSubscribe();

    71 	virtual void RegisterNewSignalL(TEventClientData& aData, const SSignalId& aSignalId ) = 0;

    72 

    73 	void RegisterSignalL(TEventClientData& aData, const SSignalId& aSignalId );

    74 	void DeRegisterSignal(TEventBase* aEvent);

    75 

    76 protected:		

    77 	RPointerArray<XSignal> iSignals;

    78 	};

    79 

    80 } // namespace NetSubscribe

    81 

    82 

    83 #endif // __NETSUBSCRIBE_H_

    84