1 /*

     2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Implements ODTInputStream

    15  *

    16 */

    17 

    18 

    19 package com.nokia.tools.themeinstaller.odtconverter;

    20 

    21 import java.io.ByteArrayOutputStream;

    22 import java.io.IOException;

    23 import java.io.InputStream;

    24 import java.util.Enumeration;

    25 

    26 /**

    27  * Implements ODTInputStream

    28  */

    29 public class ODTInputStream extends InputStream

    30     {

    31 

    32     /** ODTDocument */

    33     ODTDocument iODTDocument;

    34 

    35     /** ByteArrayOutputStream for binary representations */

    36     ByteArrayOutputStream iBaos;

    37 

    38     /** ODTDataOutputStream for writing data to stream */

    39     ODTDataOutputStream iODTDos;

    40 

    41     /** byte array for read */

    42     byte[] iByteArray = null;

    43 

    44     /** index for reading byte array */

    45     int iIndex = 0;

    46 

    47     /* Literal delimiter is used in separation of theme header and

    48     other data in ODT-streaming. */

    49     private static final char DELIM = '#';

    50 

    51     // Symbian CDirectFileStore needs these

    52     private static final int WRITE_ONCE_FILE_STORE_UID = 268435511;

    53     private static final int UNKNOWN_MEDIA_UID = 73066445;

    54 

    55    /**

    56     * Constructor

    57     * @param aODTDocument

    58     * @throws ODTException

    59     */

    60     public ODTInputStream( ODTDocument aODTDocument ) throws ODTException

    61         {

    62         iODTDocument = aODTDocument;

    63         iBaos = new ByteArrayOutputStream();

    64         iODTDos = new ODTDataOutputStream( iBaos );

    65         getBinaryRepresentations();

    66         }

    67 

    68     /**

    69      * gets binary representations of ODTHeader, ODTResources and DOMDocument

    70      * @throws ODTException

    71      */

    72     private void getBinaryRepresentations() throws ODTException

    73         {

    74         // first write stuff needed by Symbian CDirectFileStore, then

    75         // get and write ODT material

    76         try

    77             {

    78             // write first uid

    79             iODTDos.writeInt32( WRITE_ONCE_FILE_STORE_UID );

    80 

    81             // write two 0, for keeping stream valid in native side

    82             iODTDos.writeInt( 0 );

    83             iODTDos.writeInt( 0 );

    84 

    85             // write second uid

    86             iODTDos.writeInt32( UNKNOWN_MEDIA_UID );

    87 

    88             // write index where ODT header starts

    89             iODTDos.writeInt32( 20 );

    90 

    91             // get and write ODT header

    92             iBaos.write( iODTDocument.getODTHeader().getBinaryODTHeader() );

    93 

    94             // write delimiter

    95             iODTDos.writeInt16( DELIM );

    96 

    97             // write resource count

    98             int resCount = iODTDocument.getODTResources().size();

    99             iODTDos.writeInt32( resCount );

   100 

   101             // get and write ODTResources

   102             for ( Enumeration resources = iODTDocument.getODTResources()

   103                     .elements(); resources.hasMoreElements(); )

   104                 {

   105                 ODTResource odtResource = ( ODTResource ) resources

   106                         .nextElement();

   107                 iBaos.write( odtResource.getBinaryODTResource() );

   108                 }

   109 

   110             // get and write DOMDocument

   111             DOMExternalizer domExt =

   112                           new DOMExternalizer( iODTDocument.getDOMDocument() );

   113             iBaos.write( domExt.getByteArray() );

   114             }

   115         catch( IOException e )

   116             {

   117             throw new ODTException( e.getMessage() );

   118             }

   119         }

   120 

   121     /* (non-Javadoc)

   122      * @see java.io.InputStream#close()

   123      */

   124     public void close() throws IOException

   125         {

   126         iODTDos.close();

   127         iBaos.close();

   128         }

   129 

   130     /* (non-Javadoc)

   131      * @see java.io.InputStream#read()

   132      */

   133     public int read() throws IOException

   134         {

   135         if( iByteArray == null )

   136             {

   137             iByteArray = iBaos.toByteArray();

   138             }

   139         if( iIndex >= iByteArray.length )

   140             {

   141             iByteArray = null;

   142             return -1;

   143             }

   144 

   145         byte b = iByteArray[iIndex++];

   146         // because 0xff byte is -1, which is used as end of stream value,

   147         // we must return 0xff int which is 255.

   148         if( b == (byte)0xff )

   149             {

   150             return 0xff;

   151             }

   152         return b;

   153         }

   154     }