Java Code Examples for org.apache.poi.poifs.common.POIFSConstants#SMALLER_BIG_BLOCK_SIZE_DETAILS

/**
 * Constructor from large blocks
 *
 * @param name the name of the POIFSDocument
 * @param blocks the big blocks making up the POIFSDocument
 * @param length the actual length of the POIFSDocument
 */
public OPOIFSDocument(String name, RawDataBlock[] blocks, int length) throws IOException {
	_size = length;
	if(blocks.length == 0) {
	   _bigBigBlockSize = POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS;
	} else {
	   _bigBigBlockSize = (blocks[0].getBigBlockSize() == POIFSConstants.SMALLER_BIG_BLOCK_SIZE ?
	         POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS : 
	         POIFSConstants.LARGER_BIG_BLOCK_SIZE_DETAILS
	   );
	}
	
	_big_store = new BigBlockStore(_bigBigBlockSize, convertRawBlocksToBigBlocks(blocks));
	_property = new DocumentProperty(name, _size);
	_small_store = new SmallBlockStore(_bigBigBlockSize, EMPTY_SMALL_BLOCK_ARRAY);
	_property.setDocument(this);
}
 

/**
 * Constructor from small blocks
 *
 * @param name the name of the POIFSDocument
 * @param blocks the small blocks making up the POIFSDocument
 * @param length the actual length of the POIFSDocument
 */
public OPOIFSDocument(String name, SmallDocumentBlock[] blocks, int length) {
	_size = length;
	
	if(blocks.length == 0) {
	   _bigBigBlockSize = POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS;
	} else {
	   _bigBigBlockSize = blocks[0].getBigBlockSize();
	}

	_big_store = new BigBlockStore(_bigBigBlockSize, EMPTY_BIG_BLOCK_ARRAY);
	_property = new DocumentProperty(name, _size);
	_small_store = new SmallBlockStore(_bigBigBlockSize, blocks);
	_property.setDocument(this);
}
 

/**
 * create a document block from a raw data block
 *
 * @param block the raw data block
 *
 * @exception IOException
 */

public DocumentBlock(final RawDataBlock block)
    throws IOException
{
    super(
          block.getBigBlockSize() == POIFSConstants.SMALLER_BIG_BLOCK_SIZE ?
                POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS :
                POIFSConstants.LARGER_BIG_BLOCK_SIZE_DETAILS
    );
    _data       = block.getData();
    _bytes_read = _data.length;
}
 

public OPOIFSDocument(String name, ListManagedBlock[] blocks, int length) throws IOException {
   this(name, POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS, blocks, length);
}
 

public OPOIFSDocument(String name, InputStream stream) throws IOException {
   this(name, POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS, stream);
}
 

public OPOIFSDocument(String name, int size, POIFSDocumentPath path, POIFSWriterListener writer) {
   this(name, size, POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS, path, writer);
}
 

private HeaderBlock(byte[] data) throws IOException {
   this._data = data.clone();
   
	// verify signature
   FileMagic fm = FileMagic.valueOf(data);
   
   switch (fm) {
   case OLE2:
       break;
   case OOXML:
          throw new OfficeXmlFileException("The supplied data appears to be in the Office 2007+ XML. "
              + "You are calling the part of POI that deals with OLE2 Office Documents. "
              + "You need to call a different part of POI to process this data (eg XSSF instead of HSSF)");
   case XML:
          throw new NotOLE2FileException("The supplied data appears to be a raw XML file. "
              + "Formats such as Office 2003 XML are not supported");
   case MSWRITE:
          throw new NotOLE2FileException("The supplied data appears to be in the old MS Write format. "
              + "Apache POI doesn't currently support this format");
      case BIFF2:
      case BIFF3:
      case BIFF4:
          throw new OldExcelFormatException("The supplied data appears to be in "+fm+" format. "
              + "HSSF only supports the BIFF8 format, try OldExcelExtractor");
   default:
          // Give a generic error if the OLE2 signature isn't found
       String exp = HexDump.longToHex(_signature);
       String act = HexDump.longToHex(LittleEndian.getLong(data, 0));
          throw new NotOLE2FileException(
              "Invalid header signature; read " + act + ", expected " + exp +
              " - Your file appears not to be a valid OLE2 document");
   }
   
	// Figure out our block size
	if (_data[30] == 12) {
		this.bigBlockSize = POIFSConstants.LARGER_BIG_BLOCK_SIZE_DETAILS;
	} else if(_data[30] == 9) {
		this.bigBlockSize = POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS;
	} else {
	   throw new IOException("Unsupported blocksize  (2^"+ _data[30] + "). Expected 2^9 or 2^12.");
	}

   // Setup the fields to read and write the counts and starts
     _bat_count  = new IntegerField(_bat_count_offset, data).get();
     _property_start = new IntegerField(_property_start_offset,_data).get();
     _sbat_start = new IntegerField(_sbat_start_offset, _data).get();
     _sbat_count = new IntegerField(_sbat_block_count_offset, _data).get();
     _xbat_start = new IntegerField(_xbat_start_offset, _data).get();
     _xbat_count = new IntegerField(_xbat_count_offset, _data).get();
}