// Copyright (c) 2006-2009 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:

//

/**

 @file

 @publishedPartner

 @released

*/

#ifndef MMTPDATAPROVIDERFRAMEWORK_H

#define MMTPDATAPROVIDERFRAMEWORK_H

#include <e32cmn.h>

#include <e32def.h>

#include <mtp/mtpdataproviderconfig.hrh>

#include <mtp/mtpdataproviderapitypes.h>

class MMTPConnection;

class MMTPDataProviderConfig;

class MMTPFrameworkConfig;

class MMTPObjectMgr;

class MMTPReferenceMgr;

class MMTPStorageMgr;

class MMTPType;

class TMTPTypeEvent;

class TMTPTypeResponse;

class TMTPTypeRequest;

class RFs;

class MMTPDataCodeGenerator;

/**

Defines the MTP data provider framework layer application programming

interface.

@publishedPartner

@released

*/

class MMTPDataProviderFramework

    {

public:

    /**

    Provides the unique identifier of the calling data provider.

    @return The data provider identifier.

    */

    virtual TUint DataProviderId() const = 0;

    /**

    Provides the current MTP operational mode.

    @return The current MTP operational mode.

    */

    virtual TMTPOperationalMode Mode() const = 0;

    /**

    Initiates a data object receive sequence in the MTP data provider framework

    layer. This method should only be invoked when processing the ERequestPhase

    of an MTP transaction (@see CMTPDataProviderPlugin::ProcessRequestPhaseL),

    and causes the MTP session transaction state to transition to the

    @see EDataIToRPhase. The data object receive sequence is completed when the 

    MTP data provider framework layer initiates the @see EResponsePhase of the 

    MTP transaction (@see CMTPDataProviderPlugin::ProcessRequestPhaseL).

    @param aData The MTP data object sink buffer.

    @param aRequest The MTP request dataset of the active MTP transaction.

    @param aConnection The handle of the MTP connection on which the transaction

    is being processed.

    @see CMTPDataProviderPlugin::ProcessRequestPhaseL

    @leave KErrNotReady, if invoked when the current MTP transaction phase is

    not ERequestPhase.

    */

    virtual void ReceiveDataL(MMTPType& aData, const TMTPTypeRequest& aRequest, MMTPConnection& aConnection) = 0;

    /**

    Initiates a data object send sequence in the MTP data provider framework

    layer. This method should only be invoked when processing the ERequestPhase

    of an MTP transaction (@see CMTPDataProviderPlugin::ProcessRequestPhaseL),

    and causes the MTP session transaction state to transition to the

    @see EDataRToIPhase. The data object send sequence is completed when the 

    MTP data provider framework layer initiates the @see EResponsePhase of the 

    MTP transaction (@see CMTPDataProviderPlugin::ProcessRequestPhaseL).

    @param aData The MTP data object source buffer.

    @param aRequest The MTP request dataset of the active MTP transaction.

    @param aConnection The handle of the MTP connection on which the transaction

    is being processed.

    @see CMTPDataProviderPlugin::ProcessRequestPhaseL

    @leave KErrNotReady, if invoked when the current MTP transaction phase is

    not ERequestPhase.

    */

    virtual void SendDataL(const MMTPType& aData, const TMTPTypeRequest& aRequest, MMTPConnection& aConnection) = 0;

    /**

    Signals the MTP data provider framework layer to send an asynchronous event

    dataset on the specified MTP connection.

    @param aEvent The MTP event dataset source buffer.

    @param aConnection The handle of the MTP connection on which the event is

    to be sent.

    @leave KErrArgument, if the event data is not valid.

    */

    virtual void SendEventL(const TMTPTypeEvent& aEvent, MMTPConnection& aConnection) = 0;

    /**

    Signals the MTP data provider framework layer to send an asynchronous event

    dataset on all active MTP connections.

    @param aEvent The MTP event dataset source, this should always target all

    open sessions, i.e. SessionID should be set to KMTPAllSessions.

    @leave KErrArgument, if the event data is invalid.

    */

    virtual void SendEventL(const TMTPTypeEvent& aEvent) = 0;

    /**

    Initiates an MTP response dataset send sequence in the MTP data provider

    framework layer. This method should only be invoked when processing either

    the @see ERequestPhase or @see EResponsePhase of an MTP transaction, (@see

    CMTPDataProviderPlugin::ProcessRequestPhaseL) and causes the MTP session

    transaction state to transition to the @see ECompletingPhase. The MTP 

    response dataset send sequence is completed when the MTP data provider 

    framework layer initiates the @see ECompletingPhase of the MTP transaction 

    (@see CMTPDataProviderPlugin::ProcessRequestPhaseL).

    @param aResponse The MTP aResponse dataset source buffer.

    @param aConnection The handle of the MTP connection on which the transaction

    is being processed.

    @see CMTPDataProviderPlugin::ProcessRequestPhaseL

    @leave KErrNotReady, if invoked when the current MTP transaction phase is

    not ERequestPhase or EResponsePhase.

    */

    virtual void SendResponseL(const TMTPTypeResponse& aResponse, const TMTPTypeRequest& aRequest, MMTPConnection& aConnection) = 0;

    /**

    Signals to the MTP data provider framework layer that all processing

    related to the current transaction has been completed. This method should

    only be invoked when processing the @see ECompletingPhase of the MTP 

    transaction (@see CMTPDataProviderPlugin::ProcessRequestPhaseL), and causes 

    the MTP session transaction state to transition to the @see EIdle state.

    @param aRequest The MTP request dataset that initiated the transaction.

    @param aRequest The MTP request dataset of the active MTP transaction.

    @param aConnection The handle of the MTP connection on which the transaction

    is being processed.

    @see CMTPDataProviderPlugin::ProcessRequestPhaseL

    @leave KErrNotReady If invoked when the current MTP transaction phase is

    invalid.

    */

    virtual void TransactionCompleteL(const TMTPTypeRequest& aRequest, MMTPConnection& aConnection) = 0;

    /**

    Registers the calling data provider to receive one or more occurrences of 

    the specified request dataset that are received on the specified 

    connection. This method should be used to register the calling data 

    provider to receive the following request types:

        1.  Follow-on requests of an MTP operation that can span multiple 

            transaction cycles. The following request types are recognised

            by the framework as follow-on requests:

            i)  SendObject (preceded by SendObjectInfo or SendObjectPropList). 

            ii) TerminateOpenCapture (preceded by InitiateOpenCapture).

        2.  MTP vendor extension requests.

    Note that:

        1.  The request dataset being registered must minimally specify the

            Operation Code of the expected operation and the SessionID on which 

            the operation request is expected to be received. 

            Follow-on request registrations MUST specify a specific SessionID. 

            Registrations of non follow-on requests may optionally specify a 

            SessionID of @see KMTPSessionAll to receive matching requests from

            any active MTP session.

        2.  With the exception of the TransactionID element, registered request

            datasets must exactly match all data elements of the expected request 

            dataset in order to be successfully routed.

        3.  Duplicate RouteRequestRegisterL registrations are not permitted. A request 

            dataset that matches that of a previous registration by this or 

            any other data provider on the same MTP session will result in the 

            previous registration being superceded.

        4.  Pending RouteRequestRegisterL registrations can be withdrawn at any time

            using the @see RouteRequestUnregisterL method. 

        5.  RouteRequestRegisterL registrations of MTP request types which ARE 

            recognised by the framework as MTP follow-on requests (SendObject, 

            TerminateOpenCapture) will result in at most one matching request 

            occurence being routed to the data provider. To receive another 

            request dataset of the same type, a new @see RouteRequestRegisterL 

            registration must be made.

        6   RouteRequestRegisterL registrations of MTP request types which ARE

            NOT recognised by the framework as MTP follow-on requests will 

            result in all matching requests which are subsequently received 

            being routed to the data provider. This will continue until such 

            time as the RouteRequestRegisterL registration is withdrawn using 

            the @see RouteRequestUnregisterL method.

        7.  RouteRequestRegisterL registrations request datasets which specify 

            an SessionID value of @see KMTPSessionAll, will result in matching 

            requests which are subsequently received on any active MTP session

            being routed to the data provider.

    @param aRequest The operation request dataset being registered.

    @param aConnection The handle of the MTP connection on which the operation

    request is expected to be received.

    @leave KErrArgument, if the request dataset does meet the minimal

    registration requirements specified above.

    @leave One of the system wide error codes, if a general processing error

    occurs.

    @see RouteRequestUnregisterL

    */

    virtual void RouteRequestRegisterL(const TMTPTypeRequest& aRequest, MMTPConnection& aConnection) = 0;

    /**

    Cancels a pending RouteRequestRegisterL registration.

    @param aRequest The registered operation request dataset.

    @param aConnection The handle of the MTP connection for which the operation

    request was registered.

    @leave One of the system wide error codes, if a general processing error

    occurs.

    @see RouteRequestRegisterL

    */

    virtual void RouteRequestUnregisterL(const TMTPTypeRequest& aRequest, MMTPConnection& aConnection) = 0;

    /**

    Signals the completion of the data provider's object store enumeration

    sequence that was previously initiated by a StartObjectEnumerationL signal

    made to the MTP data provider interface.

    @param aStorageId The MTP StorageID of the enumerated storage. This should 

    match the value specified in the preceding StartObjectEnumerationL.

    @see MMTPDataProvider::StartObjectEnumerationL

    */

    virtual void ObjectEnumerationCompleteL(TUint32 aStorageId) = 0;

    /**

    Signals the completion of the data provider's storage enumeration sequence

    that was previously initiated by a StartStorageEnumerationL signal

    made to the MTP data provider interface.

    @see MMTPDataProvider::StartStorageEnumerationL

    */

    virtual void StorageEnumerationCompleteL() = 0;

    /**

    Provides a handle to the configurability data specified in the data 

    provider's configuration file. 

    @return Handle to the data provider's configurability data.

    */

    virtual const MMTPDataProviderConfig& DataProviderConfig() const = 0;

    /**

    Provides a handle to the data provider framework configurability parameter 

    data. 

    @return Handle to the data provider framework configurability data.

    */

    virtual const MMTPFrameworkConfig& FrameworkConfig() const = 0;

    /**

    Provides a handle to the MTP object manager, which manages the assignment

    of MTP object handles and their mapping to actual data objects on behalf

    of the data provider.

    @return Handle to the MTP data provider framework object manager.

    */

    virtual MMTPObjectMgr& ObjectMgr() const = 0;

    /**

    Provides a handle to the MTP object reference manager, to which data

    providers can delegate the handling of the MTP persistent, abstract

    object referencing mechanism.

    @return Handle to the MTP data provider framework object reference manager.

    */

    virtual MMTPReferenceMgr& ReferenceMgr() const = 0;

    /**

    Provides a handle to the MTP storage manager, which manages the assignment 

    of MTP storage identifiers on behalf of the data provider.

    @return Handle to the MTP data provider framework storage manager.

    */

    virtual MMTPStorageMgr& StorageMgr() const = 0;

    /**

    Provides a handle to the MTP data provider framework RFs session.

    @return Handle to the MTP data provider framework RFs session.

    */

    virtual RFs& Fs() const = 0;

    /**

    Provides a handle to the MTP datacode generator, which generate the datacode of service properties , formats and methods etc.

    @return Handle to the MTP datacode generator.

    */

    virtual MMTPDataCodeGenerator& DataCodeGenerator() const = 0;

    };

#endif // MMTPDATAPROVIDERFRAMEWORK_H