public void write ( DataOutput out ) throws IOException { // write a prefix indicating the type of UGI being written Text . writeString ( out , UGI_TECHNOLOGY ) ; // write this object Text . writeString ( out , userName ) ; WritableUtils . writeVInt ( out , groupNames . length ) ; for ( String groupName : groupNames ) { Text . writeString ( out , groupName ) ; } }
Serialize this object First write a string marking that this is a UGI in the string format then write this object s serialized form to the given data output