[JENA-49] Make cancellation immediate is called before execution starts

• Type: Sub-task
• Status: Closed
• Priority: Minor
• Resolution: Done
• Fix Version/s: Jena 2.11.0
• Component/s: ARQ
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 15/Feb/11 14:46
• Updated: 01/Feb/15 19:12
• Resolved: 01/Feb/15 19:12

Description

Currently, one binding is returned because of hasNext=> true implies .next mush work, done by delaying cancellation until after .next is done.

Instead, know if hasNext has been called and if not, cancel immediately.

Reduces potential user surprise.