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Posted to dev@commons.apache.org by "Stephen Colebourne (JIRA)" <ji...@apache.org> on 2006/10/28 00:26:19 UTC
[jira] Reopened: (COLLECTIONS-182) [collections] Change
CollectionUtils.forAllDo to return the Closure
[ http://issues.apache.org/jira/browse/COLLECTIONS-182?page=all ]
Stephen Colebourne reopened COLLECTIONS-182:
--------------------------------------------
Reconsider for generics version
> [collections] Change CollectionUtils.forAllDo to return the Closure
> -------------------------------------------------------------------
>
> Key: COLLECTIONS-182
> URL: http://issues.apache.org/jira/browse/COLLECTIONS-182
> Project: Commons Collections
> Issue Type: Improvement
> Affects Versions: 3.1
> Environment: Operating System: All
> Platform: All
> Reporter: Jim Cakalic
> Priority: Minor
> Fix For: Generics
>
>
> I frequently use CollectionUtils.forAllDo with a Closure that determines some
> kind of aggregate value across the members of the Collection. For example, and
> this is entirely manufactured, say I have an Order with a collection of
> LineItems. Order might use a SumClosure to count the number of actual items (not
> LineItem objects) on the Order or to compute the sum of the LineItems cost. It
> would be convenient in these cases if I could use the return of forAllDo to
> chain method calls like this:
> public BigDecimal getTotal() {
> return CollectionUtils.forAllDo(lineItems, new SumTotalClosure()).total();
> }
> As it is, I have to make do with the somewhat less compact:
> public BigDecimal getTotal() {
> SumTotalClosure closure = new SumTotalClosure();
> CollectionUtils.forAllDo(lineItems, closure);
> return closure.total();
> }
> Thanks for considering it.
> Regards,
> Jim Cakalic
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