Write comment on patch set/change from MergeValidationListener

[Andreas Wederbrand]

Hi!

I've written a plugin that does preMerge validation on a patch set. It works correctly except that I haven't found a way to communicate back to the user what validation errors I've found.

From what I can tell the only way to reject the merge is to
    throw new MergeValidationException(PATH_CONFLICT);

No other message can be given.

Is there any way to send other exceptions or exceptions with another message?
Or to write to the comments from inside the plugin?

Thanks!