[JENA-1974] Function library for working with Graph objects

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Done
• Affects Version/s: Jena 3.16.0
• Fix Version/s: Jena 3.17.0
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 01/Oct/20 13:15
• Updated: 01/Dec/20 14:32
• Resolved: 05/Oct/20 20:17

Description

This ticket introduces a library "G" (with the expectation it is usually a static import) for writing code working with Graph. It is based on original use in jena-shacl but is itself generally useful when working in Java walking data in graphs.

It provides checking operation like "getOne" when the code is expecting exactly one match, not zero, not several.

There are some operations that are RDFS aware - these would be applicable for when RDFS reasoning is not enabled (in SHACL, certain parts of RDFS are required like transitive subclass but not full RDFS reasoning).

Issue Links

• is a parent of: JENA-1991 Move operations from RiotLib to G; add some quad "find" operations