1 // Copyright (c) 2006-2009 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 // Class used to serialize DOM tree to compressed stream

    15 //

    16 

    17 

    18 

    19 /**

    20  @file

    21  @internalComponent

    22  @released

    23 */

    24 #ifndef XMLENGCGZIPOUTPUTSTREAM_H

    25 #define XMLENGCGZIPOUTPUTSTREAM_H

    26 

    27 #include <xml/dom/xmlengoutputstream.h>

    28 #include <ezbufman.h>   //MEZBufferManager

    29 #include <ezgzip.h>     //TEZGZipHeader

    30 

    31 class CEZCompressor;

    32 

    33 class CXmlEngGZIPOutputStream : public CBase, public MXmlEngOutputStream, public MEZBufferManager

    34 	{

    35 	public:

    36         static CXmlEngGZIPOutputStream* NewLC(MXmlEngOutputStream& aOutputStream);

    37 

    38         static CXmlEngGZIPOutputStream* NewL(MXmlEngOutputStream& aOutputStream);

    39 

    40 	    ~CXmlEngGZIPOutputStream();

    41 	    

    42 	    /**

    43 	     * Get last error

    44 	     */

    45 		TInt CheckError();

    46 

    47         /**

    48          * Implementation of MXmlEngOutputStream interface.

    49          */

    50 	    TInt Write( const TDesC8& aBuffer );

    51 		TInt Close();

    52         

    53         /**

    54          * Implementation of MEZBufferManager interface.

    55          */

    56 	    void InitializeL(CEZZStream& aZStream);

    57 	    void NeedInputL(CEZZStream& aZStream);

    58 	    void NeedOutputL(CEZZStream& aZStream);

    59 	    void FinalizeL(CEZZStream& aZStream);

    60 

    61 

    62     protected:

    63 	    CXmlEngGZIPOutputStream(MXmlEngOutputStream& aOutputBuffer);

    64 	    void ConstructL();

    65 

    66     private:

    67         void WriteL(const TDesC8& aBuffer);

    68 		void CloseL();

    69 			

    70 	private:

    71 	    /**

    72 	     * Last error

    73 	     */

    74 	    TInt iError;

    75 	    

    76 	    RBuf8 iOutputDescriptor;

    77 	    RBuf8 iInputDescriptor;

    78 	    RBuf8 iOldInputDescriptor;

    79 	    

    80 	    /**

    81 	     * Engine of GZiping

    82 	     */

    83 	    CEZCompressor* iCompressor;

    84 

    85 	    MXmlEngOutputStream* iOutputString;

    86         /**

    87          * State of the object.

    88          */	    

    89 	    TBool iNoInputNeeded;

    90 	    TBool iKeepGoing;

    91 	    TBool iCloseInvoked;

    92 	    

    93 	}; 

    94 

    95 

    96 

    97 #endif /* XMLENGCGZIPOUTPUTSTREAM_H */