On Thu, Oct 4, 2012 at 9:42 AM, Casper Bang <[email protected]> wrote:
> How do you guys handle callbacks with Void, say you really don't want
> anything returned because you are only consuming, streaming or the like?
>
> Say you have a generified callback for extracting rows from a dataset:
>
> public interface RowMapper[T]{
> T map(Row row);
> }
I think the best you can do is an abstract class that hides the
"return null" for you. So:
abstract class VoidRowMapper implements RowMapper<Void> {
Void map(Row row) {
voidMap(row);
return null;
}
abstract void voidMap(Row row);
}
Then, you just do VoidMapper instead of RowMapper. (And voidMap
instead of Map.)
I am interested in better ways.
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