private BATBlock createBAT(int offset, boolean isBAT) throws IOException {
// Create a new BATBlock
BATBlock newBAT = BATBlock.createEmptyBATBlock(bigBlockSize, !isBAT);
newBAT.setOurBlockIndex(offset);
// Ensure there's a spot in the file for it
ByteBuffer buffer = ByteBuffer.allocate(bigBlockSize.getBigBlockSize());
int writeTo = (1 + offset) * bigBlockSize.getBigBlockSize(); // Header isn't in BATs
_data.write(buffer, writeTo);
// All done
return newBAT;
}
/** Constructor, intended for writing */
public NPOIFSFileSystem() {
this(true);
// Mark us as having a single empty BAT at offset 0
_header.setBATCount(1);
_header.setBATArray(new int[] {0});
_bat_blocks.add(BATBlock.createEmptyBATBlock(bigBlockSize, false));
setNextBlock(0, POIFSConstants.FAT_SECTOR_BLOCK);
// Now associate the properties with the empty block
_property_table.setStartBlock(1);
setNextBlock(1, POIFSConstants.END_OF_CHAIN);
}