/*

* Copyright (c) 2002-2004 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:

*

*/

#ifndef __SMLDMADAPTER_H__

#define __SMLDMADAPTER_H__

#include <e32base.h>

#include <ecom.h>

class MSmlDmDDFObject;

class MSmlDmCallback;

class RWriteStream;

/** ECOM interface uid for DM plugin adapters */

#define KSmlDMInterfaceUid 0x102018B4

/** Maximum length of a URI segment supported by the DM framework */

#define KSmlMaxURISegLen 32

struct TSmlDmMappingInfo

/**

The struct combines an URI segment to a LUID in a device.

@publishedPartner

@prototype

*/

	{

	/** The URI segment. When using this structure, a path of the URI segment must be known */

	TBufC8<KSmlMaxURISegLen> iURISeg;

	/** Local UID in the device */

	TPtrC8 iURISegLUID;	

	};

class MSmlDmAdapter

/**

Abstract Device Management adapter.  Implementations of this interface are able to map settings

in device stores to portions of the Device Management Tree.

@publishedPartner

@prototype

*/

	{

public: //enums

	/** An enumeration of the error codes which may be returned by DM adapters.

	@publishedPartner

	@prototype

	*/

	enum TError 

		{

		/** The command was successful */

		EOk = 0,

		/** The command failed because no setting exists in the store which corresponds to the

			URI or LUID passed to the adapter */

		ENotFound,

		/** The command failed because the setting can't take the value being passed to the adapter */

		EInvalidObject,

		/** The command failed because the setting already exists in the store */

		EAlreadyExists,

		/** The command failed because the setting value is too large to be accommodated in the store */

		ETooLargeObject,

		/** The command failed because the disk on which the device store resides is full */

		EDiskFull,

		/** The command failed for an unspecified reason */

		EError,

		/** The command could not be rolled back successfully */

		ERollbackFailed,

		/** The command failed because the setting is being used by another client */

		EObjectInUse,

		/** The command failed because no memory could be allocated */

		ENoMemory

		};

public:

	/**

	The function returns current version of the DDF.

	By asking current DDF versions from adapters DM Module can control

	possible changes in the data structure and send the changed DDF

	description to a management server.

	This function is always called after DDFStructureL.

    @param aVersion DDF version of the adapter. (filled by the adapter)

	@publishedPartner

	@prototype

	*/

	virtual void DDFVersionL( CBufBase& aVersion ) = 0;

	/**

	The function for filling the DDF structure of the adapter

	This function is only called once, immediately after the adapter is created.

	@param aDDFObject	Reference to root object. A DM adapter starts filling

						the data structure by calling AddChildObjectL to the root object and

						so describes the DDF of the adapter. 

	@publishedPartner

	@prototype

	*/

	virtual void DDFStructureL( MSmlDmDDFObject& aDDF ) = 0;

	/**

	The function creates new leaf objects, or replaces data in existing leaf

	objects. The information about the success of the command should be

	returned by calling SetStatusL function of MSmlDmCallback callback

	interface. This makes it possible to buffer the commands.  However, all

	the status codes for buffered commands must be returned at the latest when

	the adapter's CompleteOutstandingCmdsL() is called.

	@param aURI			URI of the object

	@param aLUID		LUID of the object (if the adapter has earlier returned a

						LUID to the DM Module). For new objects, this is the LUID

						inherited through the parent node.

	@param aObject		Data of the object.

	@param aType		MIME type of the object

	@param aStatusRef	Reference to correct command, i.e. this reference

						must be used when calling the SetStatusL of this command

	@publishedPartner

	@prototype

	*/

	virtual void UpdateLeafObjectL( const TDesC8& aURI, const TDesC8& aLUID,

									const TDesC8& aObject, const TDesC8& aType,

									TInt aStatusRef ) = 0;

	/**

	The function creates new leaf objects, or replaces data in existing leaf

	objects, in the case where data is large enough to be streamed. The

	information about the success of the command should be returned by calling

	SetStatusL function of MSmlDmCallback callback interface. This makes it

	possible to buffer the commands.  However, all the status codes for buffered

	commands must be returned at the latest when the CompleteOutstandingCmdsL()

	of adapter is called.

	@param aURI		URI of the object

	@param aLUID		LUID of the object (if the adapter has earlier returned a

						LUID to the DM Module). For new objects, this is the LUID

						inherited through the parent node.

	@param aStream	Data of the object. Adapter should create write stream

						and return, when data is written to stream by DM agent,

						StreamCommittedL() is called by DM engine

	@param aType		MIME type of the object

	@param aStatusRef	Reference to correct command, i.e. this reference

						must be used when calling the SetStatusL of this

						command.

	@publishedPartner

	@prototype

	*/

	virtual void UpdateLeafObjectL( const TDesC8& aURI, const TDesC8& aLUID,

									RWriteStream*& aStream, const TDesC8& aType,

		 							TInt aStatusRef ) = 0;

	/**

	The function deletes an object and its child objects. The SetStatusL

	should be used as described in UpdateLeafObjectL()

	@param aURI		URI of the object

	@param aLUID		LUID of the object (if the adapter have earlier returned

						LUID to the DM Module).

	@param aStatusRef	Reference to correct command, i.e. this reference must

						be used when calling the SetStatusL of this command.

	@publishedPartner

	@prototype

	*/

	virtual void DeleteObjectL( const TDesC8& aURI, const TDesC8& aLUID,

								TInt aStatusRef ) = 0;

	/**

	The function fetches data of a leaf object. The SetStatusL should be used

	as described in UpdateLeafObjectL(). The data is returned by using the

	SetResultsL function of MSmlCallback callback interface, and may be streamed.

	@param aURI			URI of the object

	@param aLUID			LUID of the object (if the adapter have earlier

							returned LUID to the DM Module).   

	@param aType 			MIME type of the object

	@param aResultsRef	Reference to correct results, i.e. this reference

							must be used when returning the result by calling

							the SetResultsL.

	@param aStatusRef		Reference to correct command, i.e. this reference

							must be used when calling the SetStatusL of this

							command.

	@publishedPartner

	@prototype

	*/

	virtual void FetchLeafObjectL( const TDesC8& aURI, const TDesC8& aLUID,

								   const TDesC8& aType, TInt aResultsRef,

								   TInt aStatusRef ) = 0;

	/**

	The function fetches the size of the data of a leaf object. The size is

	in bytes, and must reflect the number of bytes that will be transferred

	when the framework calls FetchLeafObjectL. The SetStatusL should be used

	as described in FetchLeafObjectL(). The size value is returned by using

	the SetResultsL function of MSmlCallback callback interface, and must be

	a decimal integer expressed as a string, eg. "1234".

	Results from this call MUST NOT be streamed.

	@param aURI			URI of the object

	@param aLUID			LUID of the object (if the adapter have earlier

							returned LUID to the DM Module).   

	@param aType 			MIME type of the object

	@param aResultsRef	Reference to correct results, i.e. this reference

							must be used when returning the result by calling

							the SetResultsL.

	@param aStatusRef		Reference to correct command, i.e. this reference

							must be used when calling the SetStatusL of this

							command.

	@publishedPartner

	@prototype

	*/

	virtual void FetchLeafObjectSizeL( const TDesC8& aURI, const TDesC8& aLUID,

									   const TDesC8& aType, TInt aResultsRef,

									   TInt aStatusRef ) = 0;

	/**

	The function fetches URI list. An adapter returns the list of URI segments

	under the given URI be separated by slash ("/"). The URI segment names for

	new objects must be given by the adapter.

	The list is returned by calling the SetResultsL function of MSmlCallback

	callback interface.	Results from this call MUST NOT be streamed.

	@param aParentURI					URI of the parent object

	@param aParentLUID				LUID of the parent object (if the

										adapter have earlier returned LUID to

										the DM Module).   

	@param aPreviousURISegmentList	URI list with mapping LUID information,

										which is known by DM engine. An adapter

										can use this information when verifying

										if old objects still exists. An adapter

										also knows what objects are new to DM

										engine and can provide LUID mapping for

										them. aPreviousURISegmentList parameter

										(see above) helps to recognise new

										objects.

	@param aResultsRef				Reference to correct results, i.e. this

										reference must be used when returning

										the result by calling the SetResultsL.

	@param aStatusRef					Reference to correct command, i.e. this

										reference must be used when calling the

										SetStatusL of this command.

	@publishedPartner

	@prototype

	*/

	virtual void ChildURIListL( const TDesC8& aURI, const TDesC8& aLUID,

					const CArrayFix<TSmlDmMappingInfo>& aPreviousURISegmentList,

					TInt aResultsRef, TInt aStatusRef ) = 0;

	/**

	The function adds node object. In some cases an implementation of the

	function may be empty function, if the node object does not need concrete

	database update. Still this function may be helpful to an adapter, i.e. in

	passing mapping LUID of the node to DM Module. The SetStatusL should be

	used as described in UpdateLeafObjectL()

	@param aURI			URI of the object

	@param aParentLUID	LUID of the parent object (if the adapter have

							earlier returned LUID to the DM Module).   

	@param aStatusRef		Reference to correct command, i.e. this reference

							must be used when calling the SetStatusL of this

							command.

	@publishedPartner

	@prototype

	*/

	virtual void AddNodeObjectL( const TDesC8& aURI, const TDesC8& aParentLUID,

								 TInt aStatusRef )=0;

	/**

	The function implements execute command. The information about the success

	of the command should be returned by calling SetStatusL function of

	MSmlDmCallback callback interface. This makes it possible to buffer the

	commands.

	However, all the status codes for buffered commands must be returned at

	the latest when the CompleteOutstandingCmdsL() of adapter is called.

	@param aURI			URI of the command

	@param aLUID			LUID of the object (if the adapter have earlier

							returned LUID to the DM Module).   

	@param aArgument		Argument for the command

	@param aType			MIME type of the object 

	@param aStatusRef		Reference to correct command, i.e. this reference

							must be used when calling the SetStatusL of this

							command.

	@publishedPartner

	@prototype

	*/

	virtual void ExecuteCommandL( const TDesC8& aURI, const TDesC8& aLUID,

							      const TDesC8& aArgument, const TDesC8& aType,

								  TInt aStatusRef ) = 0;

	/**

	The function implements execute command. The information about the

	success of the command should be returned by calling SetStatusL function

	of MSmlDmCallback callback interface. This makes it possible to buffer the

	commands.

	However, all the status codes for buffered commands must be returned at

	the latest when the CompleteOutstandingCmdsL() of adapter is called.

	@param aURI			URI of the command

	@param aLUID			LUID of the object (if the adapter have earlier

							returned LUID to the DM Module).   

	@param aStream		Argument for the command. Adapter should create

							write stream and return, when data is written to

							stream by DM agent, StreamCommittedL() is called by

							DM engine

	@param aType			MIME type of the object 

	@param aStatusRef		Reference to correct command, i.e. this reference

							must be used when calling the SetStatusL of this

							command.

	@publishedPartner

	@prototype

	*/

	virtual void ExecuteCommandL( const TDesC8& aURI, const TDesC8& aLUID,

								  RWriteStream*& aStream, const TDesC8& aType,

								  TInt aStatusRef ) = 0;

	/**

	The function implements copy command. The information about the success of

	the command should be returned by calling SetStatusL function of

	MSmlDmCallback callback interface. This makes it possible to buffer the

	commands.

	However, all the status codes for buffered commands must be returned at

	the latest when the CompleteOutstandingCmdsL() of adapter is called.

	@param aTargetURI		Target URI for the command

	@param aSourceLUID	LUID of the target object (if one exists, and if the adapter

							has	earlier returned a LUID to the DM Module).   

	@param aSourceURI		Source URI for the command

	@param aSourceLUID	LUID of the source object (if the adapter has

							earlier returned a LUID to the DM Module).   

	@param aType			MIME type of the objects

	@param aStatusRef		Reference to correct command, i.e. this reference

							must be used when calling the SetStatusL of this

							command.

	@publishedPartner

	@prototype

	*/

	virtual void CopyCommandL( const TDesC8& aTargetURI, const TDesC8& aTargetLUID,

							   const TDesC8& aSourceURI, const TDesC8& aSourceLUID,

							   const TDesC8& aType, TInt aStatusRef ) = 0;

	/**

	The function indicates start of Atomic command.

	@publishedPartner

	@prototype

	*/

	virtual void StartAtomicL() = 0;

	/**

	The function indicates successful end of Atomic command. The adapter

	should commit all changes issued between StartAtomicL() and

	CommitAtomicL()

	@publishedPartner

	@prototype

	*/

	virtual void CommitAtomicL() = 0;

	/**

	The function indicates unsuccessful end of Atomic command. The adapter

	should rollback all changes issued between StartAtomicL() and

	RollbackAtomicL(). If rollback fails for a command, adapter should use

	SetStatusL() to indicate it.

	@publishedPartner

	@prototype

	*/

	virtual void RollbackAtomicL() = 0;

	/**

    Returns ETrue if adapter supports streaming otherwise EFalse.

	@param aItemSize size limit for stream usage

    @return TBool ETrue for streaming support

	@publishedPartner

	@prototype

    */

	virtual TBool StreamingSupport( TInt& aItemSize ) = 0;

	/**

    Called when stream returned from UpdateLeafObjectL or ExecuteCommandL has

	been written to and committed. Not called when fetching item.

	@publishedPartner

	@prototype

    */	

	virtual void StreamCommittedL() = 0;

	/**

	The function tells the adapter that all the commands of the message that

	can be passed to the adapter have now been passed.  This indciates that

	the adapter must supply status codes and results to any buffered commands.

	This must be done at latest by the time this function returns.

	This function is used at the end of SyncML messages, and during processing

	of Atomic.   In the case of Atomic processing, the function will be

	followed by a call to CommitAtomicL or RollbackAtomicL.

	@publishedPartner

	@prototype

	*/

	virtual void CompleteOutstandingCmdsL() = 0;

	};

class TSmlDmAccessTypes

/**

This class sets the access types which are allowed for a DM object.

@publishedPartner

@prototype

*/

	{

public:

	enum 

	/**

	This enumeration describes the possible access types for a DM object

	@publishedPartner

	@prototype

	*/

		{

		/** The DM Command Add is permitted on this DM object */

		EAccessType_Add		= 0x01,

		/** The DM Command Copy is permitted on this DM object */

		EAccessType_Copy	= 0x02,

		/** The DM Command Delete is permitted on this DM object */

		EAccessType_Delete	= 0x04,

		/** The DM Command Exec is permitted on this DM object */

		EAccessType_Exec	= 0x08,

		/** The DM Command Get is permitted on this DM object */

		EAccessType_Get		= 0x10,

		/** The DM Command Replace is permitted on this DM object */

		EAccessType_Replace = 0x20

		};

public:

	inline TSmlDmAccessTypes();

	inline void SetAdd();

	inline void SetCopy();

	inline void SetDelete();

	inline void SetExec();

	inline void SetGet();

	inline void SetReplace();

	inline TUint8 GetACL();

	inline void Reset();

private:

	TUint8 iACL;

	};

class CSmlDmAdapter : public CBase, public MSmlDmAdapter

/**

The class CSmlDmAdapter is an ECOM interface for Device Management adapter plugins.

This interface which must be implemented by every DM plugin adapter

@publishedPartner

@prototype

*/

	{

public:

	inline static CSmlDmAdapter* NewL( const TUid& aImplementationUid,

									   MSmlDmCallback& aDmCallback ); 

	inline virtual ~CSmlDmAdapter();

protected:

	inline CSmlDmAdapter(TAny* aEcomArguments);

	inline MSmlDmCallback& Callback();

private:

	/** ECOM framework requires this ID in object destructor

	@internalTechnology

	@prototype

	*/

	TUid iDtor_ID_Key;

	/** The DM Framework's callback for returning command results and data

	@internalTechnology

	@prototype

	*/

	MSmlDmCallback& iCallback;

	};

class MSmlDmCallback

/**

This class is callback interface which is implemented in DM Module. An

instance is passed by reference as an argument to the CSmlDmAdapter::NewL()

function. This interface is mostly used for returning results and status

codes for completed commands to the DM framework. The interface also has

functionality for mapping LUIDs and fetching from other parts of the DM Tree.

The adapter does not necessarily need to use any other functions but the

SetStatusL and SetResultsL, if it handles the LUID mapping itself.

@publishedPartner

@prototype

*/

	{

	public:

	/**

	The function is used to return the data in case of FetchLeafObjectL(),

	FetchLeafObjectSizeL() and ChildURIListL() functions. It should not be

	called where the DM command has failed, i.e. the error code returned in

	SetStatusL is something other than EOk.

	@param aResultsRef	Reference to correct command

	@param aObject		The data which should be returned

	@param aType			MIME type of the object

	@publishedPartner

	@prototype

	*/

	virtual void SetResultsL( TInt aResultsRef, CBufBase& aObject,

							  const TDesC8& aType ) = 0;

	/**

	The function is used to return the data in case of FetchLeafObjectL() and

	ChildURIListL() functions, where the size of the data being returned is

	large enough for the Adapter to stream it. This function should not be

	called when command was failed, i.e. the error code returned in SetStatusL

	is something other than EOk.

	@param aResultsRef	Reference to correct command

	@param aStream		Large data which should be returned, DM engine

							closes stream when it has read all the data

	@param aType			MIME type of the object

	@publishedPartner

	@prototype

	*/

	virtual void SetResultsL( TInt aResultsRef, RReadStream*& aStream,

							  const TDesC8& aType ) = 0;

	/**

	The function returns information about the Add,Update,Delete and Fetch

	commands success to DM engine. The reference to correct command must be

	used when calling the SetStatusL function, the reference is got from the

	argument of the command functions. The SetStatusL function must be called

	separately for every single command.

	@param aStatusRef	Reference to correct command

	@param aErrorCode	Information about the command success

	@publishedPartner

	@prototype