question: public void write ( byte [ ] buf , int off , int len ) throws TTransportException { if ( outputStream_ == null ) { throw new TTransportException ( TTransportException . NOT_OPEN , "Cannot write to null outputStream" ) ; } try { outputStream_ . write ( buf , off , len ) ; } catch ( IOException iox ) { throw new TTransportException ( TTransportException . UNKNOWN , iox ) ; } }
target:  Writes to the underlying output stream if not null.