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

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Done
• Affects Version/s: Jena 3.5.0
• Fix Version/s: Jena 3.6.0
• Component/s: Core
• Labels: easytask
• Assignee: Andy Seaborne
• Reporter: Adam Jacobs
• Created: 17/Nov/17 16:56
• Updated: 17/Dec/17 19:46
• Resolved: 06/Dec/17 14:37

Description

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.

    /**
         Answer the next object, if it exists, otherwise invoke the _supplier_.
     */
    public default T nextOrElse( Supplier<T> supplier ) {
        return hasNext() ? next() : supplier.get();
    }

Issue Links

• links to: GitHub Pull Request #323