[Pljava-dev] Cancelling trigger operation

Hi Thomas,

when a trigger function is written in pl/pgsql, you can decide to cancel the
operation in a trigger(defined as "before event") by returning null instead
of "new", e.g.

create function cancelling_trigger() returns trigger as
'
begin
if new.num < 0 then
-- cancel operation for negative numbers
return null;
else
-- continue
-- do something...
return new;
end if;
end
' language 'plpgsql';

Is there any way to do the same in pljava? I can't see it now, since the
trigger functions are mapped to static java methods with no return values
(void):

public static void cancellingTrigger(TriggerData td) throws SQLException {
if (td.getNew().getInt("num") < 0) {
//Cancel operation - HOW???
}
else {
//Continue
//do something...
}
}

Filip