Feedback and comments on ARM proposal

[Mark Mahieu]

LOL, ok yes you could do that :)
What I meant was that you couldn't write it like this:

try (Iterator<Element> elementIterator : autoRemove(elements.iterator())) {
    // Use elementIterator ...
}

... unless of course 'Iterator' is your own Iterator type rather than the
java.util version :)


Mark


2009/3/21 Tim Peierls <tim at peierls.net>

> On Sat, Mar 21, 2009 at 11:30 AM, Mark Mahieu <markmahieu at googlemail.com>wrote:
>
>> For example, I couldn't get ARM to call Iterator.remove() at the end of my
>> try blocks :)
>>
>
> Sure you could! You just have to really mean it. :-)
>
> public class AutoRemovingIterator<T> extends ForwardingIterator<T>
> implements AutoRemovable {
>     private AutoRemovingIterator(Iterator<T> it) { this.it = it; }
>     protected Iterator<T> delegate() { return it; }
>     private final Iterator<T> it;
>
>     public static AutoRemovingIterator<T> autoRemove(Iterator<T> it) {
>         return new AutoRemovingIterator<T>(it);
>     }
> }
>
> // In other code, with autoRemove statically imported:
>
>     try (AutoRemovingIterator<Element> elementIterator :
> autoRemove(elements.iterator())) {
>         // Use elementIterator ... when you're done,
> elementIterator.remove() will be called.
>     }
>
> Not that this contributes anything useful to the discussion.
>
> --tim
>
>