Was the ruling correct?

[NewGaRef]

Been reading posts for a while. Now I have a question.....

I had a game recently, in which, I observed an official make a call that
confused me because I haven't seen anything written on it. The ball was
given to a player for a 'spot' throw in. The player bounced the ball once,
without touching the line and then proceeded to throw the ball in. The
official called a violation and awarded the ball to the other team. I
asked him about the call after the game and he stated that a player can not
dribble the ball during the throw in. Was the official correct in his
call?

Hopefully the question is clear. Please advise. Thanks in advance for
your help.