public ByteBuffer read(int length, long position) throws IOException {if(position >= size()) {throw new IndexOutOfBoundsException("Position " + position + " past the end of the file");}ByteBuffer dst;if (writable) {dst = channel.map(FileChannel.MapMode.READ_WRITE, position, length);buffersToClean.add(dst);} else {channel.position(position);dst = ByteBuffer.allocate(length);int worked = IOUtils.readFully(channel, dst);if(worked == -1) {throw new IndexOutOfBoundsException("Position " + position + " past the end of the file");}}dst.position(0);return dst;}
public override ByteBuffer Read(int length, long position){if (position >= Size)throw new ArgumentException("Position " + position + " past the end of the file");ByteBuffer dst;int worked = -1;if (writable){dst = ByteBuffer.CreateBuffer(length);worked = 0;}else{fileStream.Position = position;dst = ByteBuffer.CreateBuffer(length);worked = IOUtils.ReadFully(fileStream, dst.Buffer);}if(worked == -1)throw new ArgumentException("Position " + position + " past the end of the file");dst.Position = 0;return dst;}