/// <summary>
/// Initializes a new instance of the <see cref="SmallBlockTableWriter"/> class.
/// </summary>
/// <param name="documents">a IList of POIFSDocument instances</param>
/// <param name="root">the Filesystem's root property</param>
public SmallBlockTableWriter(POIFSBigBlockSize bigBlockSize, IList documents,
RootProperty root)
{
_sbat = new BlockAllocationTableWriter(bigBlockSize);
_small_blocks = new ArrayList();
_root = root;
IEnumerator iter = documents.GetEnumerator();
while (iter.MoveNext())
{
POIFSDocument doc = ( POIFSDocument )iter.Current;
BlockWritable[] blocks = doc.SmallBlocks;
if (blocks.Length != 0)
{
doc.StartBlock = _sbat.AllocateSpace(blocks.Length);
for (int j = 0; j < blocks.Length; j++)
{
_small_blocks.Add(blocks[j]);
}
}
else
{
doc.StartBlock = POIFSConstants.END_OF_CHAIN;
}
}
_sbat.SimpleCreateBlocks();
_root.Size = _small_blocks.Count;
_big_block_count = SmallDocumentBlock.Fill(bigBlockSize, _small_blocks);
}
/// <summary>
/// Initializes a new instance of the <see cref="SmallBlockTableWriter"/> class.
/// </summary>
/// <param name="documents">a IList of POIFSDocument instances</param>
/// <param name="root">the Filesystem's root property</param>
public SmallBlockTableWriter(POIFSBigBlockSize bigBlockSize, IList documents,
RootProperty root)
{
_sbat = new BlockAllocationTableWriter(bigBlockSize);
_small_blocks = new ArrayList();
_root = root;
IEnumerator iter = documents.GetEnumerator();
while (iter.MoveNext())
{
POIFSDocument doc = ( POIFSDocument ) iter.Current;
BlockWritable[] blocks = doc.SmallBlocks;
if (blocks.Length != 0)
{
doc.StartBlock=_sbat.AllocateSpace(blocks.Length);
for (int j = 0; j < blocks.Length; j++)
{
_small_blocks.Add(blocks[ j ]);
}
} else {
doc.StartBlock=POIFSConstants.END_OF_CHAIN;
}
}
_sbat.SimpleCreateBlocks();
_root.Size=_small_blocks.Count;
_big_block_count = SmallDocumentBlock.Fill(bigBlockSize, _small_blocks);
}
/// <summary>
/// Writes the file system.
/// </summary>
/// <param name="stream">the OutputStream to which the filesystem will be
/// written</param>
public void WriteFileSystem(Stream stream)
{
// Get the property table Ready
_property_table.PreWrite();
// Create the small block store, and the SBAT
SmallBlockTableWriter sbtw =
new SmallBlockTableWriter(bigBlockSize,_documents, _property_table.Root);
// Create the block allocation table
BlockAllocationTableWriter bat =
new BlockAllocationTableWriter(bigBlockSize);
// Create a list of BATManaged objects: the documents plus the
// property table and the small block table
ArrayList bm_objects = new ArrayList();
bm_objects.AddRange(_documents);
bm_objects.Add(_property_table);
bm_objects.Add(sbtw);
bm_objects.Add(sbtw.SBAT);
// walk the list, allocating space for each and assigning each
// a starting block number
IEnumerator iter = bm_objects.GetEnumerator();
while (iter.MoveNext())
{
BATManaged bmo = ( BATManaged ) iter.Current;
int block_count = bmo.CountBlocks;
if (block_count != 0)
{
bmo.StartBlock=bat.AllocateSpace(block_count);
}
else
{
// Either the BATManaged object is empty or its data
// is composed of SmallBlocks; in either case,
// allocating space in the BAT is inappropriate
}
}
// allocate space for the block allocation table and take its
// starting block
int batStartBlock = bat.CreateBlocks();
// Get the extended block allocation table blocks
HeaderBlockWriter header_block_Writer = new HeaderBlockWriter(bigBlockSize);
BATBlock[] xbat_blocks =
header_block_Writer.SetBATBlocks(bat.CountBlocks,
batStartBlock);
// Set the property table start block
header_block_Writer.PropertyStart=_property_table.StartBlock;
// Set the small block allocation table start block
header_block_Writer.SBATStart=sbtw.SBAT.StartBlock;
// Set the small block allocation table block count
header_block_Writer.SBATBlockCount=sbtw.SBATBlockCount;
// the header is now properly initialized. Make a list of
// Writers (the header block, followed by the documents, the
// property table, the small block store, the small block
// allocation table, the block allocation table, and the
// extended block allocation table blocks)
ArrayList Writers = new ArrayList();
Writers.Add(header_block_Writer);
Writers.AddRange(_documents);
Writers.Add(_property_table);
Writers.Add(sbtw);
Writers.Add(sbtw.SBAT);
Writers.Add(bat);
for (int j = 0; j < xbat_blocks.Length; j++)
{
Writers.Add(xbat_blocks[j]);
}
// now, Write everything out
iter = Writers.GetEnumerator();
while (iter.MoveNext())
{
BlockWritable Writer = ( BlockWritable ) iter.Current;
Writer.WriteBlocks(stream);
}
Writers=null;
iter = null;
}
