@Override
public ByteBuffer getBuffer() {
    if (position == 0) {
        return bufferList.get(position);
    }
    byte[] data = new byte[(position) * bufferList.get(0).capacity() + bufferList.get(position).limit()];
    int index = 0;
    for (int i = 0; i < position; i++) {
        ByteBuffer b = bufferList.get(i);
        System.arraycopy(b.array(), b.position(), data, index, b.remaining());
        index += b.remaining();
    }
    ByteBuffer lastBuffer = bufferList.get(position);
    System.arraycopy(lastBuffer.array(), lastBuffer.position(), data, index, lastBuffer.remaining());
    return ByteBuffer.wrap(data);
}