[jira] [Commented] (JENA-1427) Add nextOrElse() method in ExtendedIterator

["A. Soroka (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-1427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257220#comment-16257220 ] 

A. Soroka commented on JENA-1427:
---------------------------------

Maybe I'm misunderstanding the use case here, but if this method is used instead of {{next()}}, how will the client of {{ExtendedIterator}} know when to stop consuming?

> Add nextOrElse() method in ExtendedIterator
> -------------------------------------------
>
>                 Key: JENA-1427
>                 URL: https://issues.apache.org/jira/browse/JENA-1427
>             Project: Apache Jena
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: Jena 3.5.0
>            Reporter: Adam Jacobs
>            Priority: Trivial
>              Labels: easytask
>
> Allow a functional approach for returning a default value or throwing a custom exception from a Jena iterator.
> The following method may be added to the ExtendedIterator interface.
> {noformat}
>     /**
>          Answer the next object, if it exists, otherwise invoke the _supplier_.
>      */
>     public default T nextOrElse( Supplier<T> supplier ) {
>         return hasNext() ? next() : supplier.get();
>     }
> {noformat}



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