[JENA-1074] Add find operations for DatasetGraph for the union graph.

• Type: Brainstorming
• Status: Closed
• Priority: Minor
• Resolution: Done
• Affects Version/s: Jena 3.0.0
• Fix Version/s: Jena 3.4.0
• Component/s: ARQ
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 22/Nov/15 17:26
• Updated: 21/Jul/17 09:29
• Resolved: 08/Jun/17 14:57

Description

(This follows on from JENA-1064)

DatasetGraphBaseFind now has a find operations for the union graph added to make implementation easier.

Should operation(s) be exposed in the core interface DatasetGraph (the application contract)? If so, how?

The operations to consider include:

• findInUnionGraph (Iterator<Triple>)
• findQuadsInUnionGraph (Iterator<Quad>)
• findInDftGraph (Iterator<Quad> - inconsistent naming with above)

At the moment findInDftGraph returns quads and documents DatasetGraph.getDefaultGraph().find() as being the way to get triples. This suggests a different style where DatasetGraph has:

• DatasetGraph.getUnionGraph()
• DatasetGraphFind.findInUnionGraph (Iterator<Quad>)

Issue Links

• is depended upon by: JENA-1158 Provide unionDefaultGraph for all graphs.
• relates to: JENA-1064 Add DatasetGraphBaseFind.findInUnionGraph
• links to: GitHub Pull Request #260