/*

* Copyright (c) 2002-2007 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:  Class for reading data from Java SourceStream to native side

*

*/

#ifndef CMMASOURCESTREAM_H

#define CMMASOURCESTREAM_H

//#include <jutils.h>

#include "mmafunctionserver.h"

class CMMASourceStreamEvent;

class MMMASourceStreamListener;

class MMMAEventPoster;

// CONSTANTS

const TInt KMMAReadAllData = -1;

//  CLASS DECLARATION

/**

*   Class for reading data from Java SourceStream to native side

*

*

*/

NONSHARABLE_CLASS(CMMASourceStream): public CBase

{

public:

    /**

     * Status of the source stream reader

     */

    enum TStatus

    {

        EReadAll = 1,

        ERead = 2,

        EMoreData = 3,

        ECompleted = 4,

        EClosed = 5

    };

public:     // Constructors and destructors

    /**

     * Object creation. Static method.

     *

     * @param aJNIEnv           handle to used jni environment

     * @param aEventPoster      handle to event poster

     * @param aJavaSourceStream handle to java SourceStream object

     * @param aListener         Handle to source stream listener

     *

     * @return CMMASourceStream object

     */

    static CMMASourceStream* NewL(JNIEnv* aJNIEnv,

                                  MMMAEventPoster* aEventPoster,

                                  jobject aJavaSourceStream,

                                  MMMASourceStreamListener* aListener);

    /**

     * The same as NewL with cleanup stack

     * @see NewL

     */

    static CMMASourceStream* NewLC(JNIEnv* aJNIEnv,

                                   MMMAEventPoster* aEventPoster,

                                   jobject aJavaSourceStream,

                                   MMMASourceStreamListener* aListener);

    /**

     * Deletes owned objects

     */

    ~CMMASourceStream(); // Destructor

protected:  // Constructors and destructors

    /**

     * Set variables

     * @param aEventPoster handle to event poster

     * @param aListener    handle to source stream listener

     */

    CMMASourceStream(MMMAEventPoster* aEventPoster,

                     MMMASourceStreamListener* aListener);

    /**

     * 2nd phase constructor

     *

     * @param aJNIEnv           used jni environment

     * @param aJavaSourceStream handle to java source stream object

     */

    void ConstructL(JNIEnv* aJNIEnv, jobject aJavaSourceStream);

public:     // New methods

    /**

     * Writes data to from java buffer to native side

     *

     * @param aData   data passed by Java side

     * @param aLength size of passed data

     * @param state of this class

     */

    virtual void WriteL(const TUint8* aData,

                        TInt aLength, TInt aState);

    /**

     * Read aLength bytes from Java source stream

     *

     * @param aLength size of read

     */

    void ReadL(TInt aLength);

    /**

     * Read all data from Java source stream, clears buffer

     */

    void ReadAllL();

    /**

     * Reset all data

     */

    virtual void ResetData();

    /**

     * Creates data buffer

     *

     * @param aBufferSize data buffer size

     */

    void CreateDataBufferL(TInt aBufferSize);

protected:  // New methods

    /**

     * Prepare whatever is necessary for reading

     */

    virtual void PrepareReadL();

protected:

    CMMASourceStreamEvent* iReadEvent;

    MMMAEventPoster* iEventPoster;

    MMMASourceStreamListener* iListener;

protected:

    /**

     * Buffer where data from java side will be read, Owned

     */

    HBufC8* iData;

    /**

     * number of bytes coming from java stream, KMMAReadAllData is whole stream

     */

    TInt iReadLength;

    /**

     * current position

     */

    TInt iBufferPosition;

};

#endif // CMMASOURCESTREAM_H