How can I determine if a Jena Reasoner is a Rule capable reasoner

Asked Sep 15 '11 at 09:07

Active Mar 15 '18 at 13:12

Viewed 298 times

Jena provides a generic Reasoner interface when returning the reasoner of a model. How can I determine if it is a Rule based, so I can cast it to a GenericRuleReasoner and use the methods for manipulating rules?

Note: without using instanceof :)

Example

// in one part of the app it something like this
OntModelSpec spec = OntModelSpec.OWL_MEM_MICRO_RULE_INF;
OntModel ontologyModel = ModelFactory.createOntologyModel(spec, model);

// in another part
Reasoner reasoner = ontologyModel.getReasoner();

So now the reasoner is a com.hp.hpl.jena.reasoner.rulesys.OWLMicroReasoner determined by .getClass() but I want to cast it to a GenericRuleReasoner by determining if it IS a rule capable one.

edited Mar 15 '18 at 13:12

Stanislav Kralin

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asked Sep 15 '11 at 09:07

Azder

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Why do you not want to use instanceof? – S.L. Barth is on codidact.com Sep 15 '11 at 13:31
I'm using it. It just limits me on Jena provided reasoners that extend GenericRuleReasoner. It kind of limits the possibility to plug-in others. – Azder Sep 15 '11 at 16:38

How can I determine if a Jena Reasoner is a Rule capable reasoner

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