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 // Interface class describing class that may be used as

    15 // output stream for dom tree

    16 //

    17 

    18 

    19 

    20 /**

    21  @file

    22  @internalComponent

    23  @released

    24 */

    25 #ifndef XMLENGCGZIPBUFFEROUTPUTSTREAM_H

    26 #define XMLENGCGZIPBUFFEROUTPUTSTREAM_H

    27 

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

    29 #include <ezbufman.h>   //MEZBufferManager

    30 #include <ezgzip.h>     //TEZGZipHeader

    31 

    32 class CEZCompressor;

    33 

    34 

    35 

    36 class CXmlEngGZIPBufferOutputStream : public CBase, public MXmlEngOutputStream, public MEZBufferManager

    37 	{

    38 	public:

    39         static CXmlEngGZIPBufferOutputStream* NewLC(RBuf8& aOutputBuffer);

    40 

    41         static CXmlEngGZIPBufferOutputStream* NewL(RBuf8& aOutputBuffer);

    42 

    43 	    ~CXmlEngGZIPBufferOutputStream();

    44 	    

    45 	    /**

    46 	     * Get last error

    47 	     */

    48 		TInt CheckError();

    49 

    50         /**

    51          * Implementation of MXmlEngOutputStream interface.

    52          */

    53 	    TInt Write( const TDesC8& aBuffer );

    54 		TInt Close();

    55         

    56         /**

    57          * Implementation of MEZBufferManager interface.

    58          */

    59 	    void InitializeL(CEZZStream& aZStream);

    60 	    void NeedInputL(CEZZStream& aZStream);

    61 	    void NeedOutputL(CEZZStream& aZStream);

    62 	    void FinalizeL(CEZZStream& aZStream);

    63 

    64 

    65     protected:

    66 	    CXmlEngGZIPBufferOutputStream(RBuf8& aOutputBuffer);

    67 	    void ConstructL();

    68 

    69     private:

    70         void WriteL(const TDesC8& aBuffer);

    71 		void CloseL();

    72 			

    73 	private:

    74 	    /**

    75 	     * Last error

    76 	     */

    77 	    TInt iError;

    78 	    

    79 	    /**

    80 	     * Default input buffers size.

    81 	     */

    82 	    static const TInt KDefaultInputBufferSize = 4096;

    83 	    

    84 	    /**

    85 	     * Output buffer size. It determines, how often output data will be written

    86 	     * to disk. (it's written to disk, when buffer is full.

    87 	     *

    88 	     */   

    89 	    static const TInt KOutputBufferSize = 0x8000;

    90 	    

    91 	    RBuf8 iOutputDescriptor;

    92 	    RBuf8 iInputDescriptor;

    93 	    RBuf8 iOldInputDescriptor;

    94 	    

    95 	    /**

    96 	     * Engine of GZiping

    97 	     */

    98 	    CEZCompressor* iCompressor;

    99 

   100 	    RBuf8& iOutputString;

   101         /**

   102          * State of the object.

   103          */	    

   104 	    TBool iNoInputNeeded;

   105 	    TBool iKeepGoing;

   106 	    TBool iCloseInvoked;

   107 	    

   108 	}; 

   109 

   110 

   111 

   112 #endif /* XMLENGCGZIPBUFFEROUTPUTSTREAM_H */