Unable to initiate 'reasoner' class object of Openllet about openllet HOT 12 CLOSED

The current SWRLAPI is not compatible with OWLAPI 5. I'll put up a forked repo with the required changes.

from openllet.

Hello,
to help you I need a little more informations. What version of Openllet are you using ? what version of Java (javac) are you using ? Do you use maven/gradle ?

from openllet.

Hi,
Thank you for replying. I use maven to install dependencies, version of javac is 1.8.0_151, and finally, the version of Openllet is 2.6.3

from openllet.

Strange. "java/util/stream/Stream" is a Java8 class, not an inner openllet/owl-api class.
How do you execute your code ? Are you sure the execution also use a Java8+ ?

from openllet.

It is a classpath problem. You have an incompatible version of OWLAPI in the classpath, one that predates 5.0.0.

from openllet.

Ignazio is right, the maven dependency tree show the owlapi-osgidistribution-4.2.8 in the resolved dependencies. It come from swrlapi-2.0.4 . This owlapi-osgidistribution doesn't not conflict with other artifcate because it is the only one to include it; so maven doesn't overwrite the version.

Here you have multiples solutions :

1. Force include a recent version of owlapi-osgidistribution-5.X.X ; it may create failure in swrlapi.
2. Upgrade swrlapi to a version that is using owlapi version 5.X.X

from openllet.

Although, the previous error vanished it did fail in running SWRL API. Now, I understood where the problem exists, I will try to rectify it by myself or else post the issue separately.

from openllet.

https://github.com/ignazio1977/swrlapi can be checked out and built locally to get SWRLAPI compatible with Openllet and OWLAPI 5. I can't provide a Maven release for this - it would conflict with the Protege provided one, in the long term.

from openllet.

Thank you.

from openllet.

I am presented with the following error:

Exception in thread "main" org.swrlapi.exceptions.SWRLRuleEngineException: Error creating rule engine Drools. Exception: java.lang.NoSuchMethodError. Message: org.semanticweb.owlapi.model.OWLDocumentFormat.isPrefixOWLOntologyFormat()Z
at org.swrlapi.factory.DefaultSWRLRuleAndQueryEngineFactory.createSWRLRuleEngine(DefaultSWRLRuleAndQueryEngineFactory.java:71)
at org.swrlapi.factory.DefaultSWRLRuleAndQueryEngineFactory.createSWRLRuleEngine(DefaultSWRLRuleAndQueryEngineFactory.java:41)
at org.swrlapi.factory.SWRLAPIFactory.createSWRLRuleEngine(SWRLAPIFactory.java:38)
at SWRLrules.main(SWRLrules.java:57)
Caused by: java.lang.NoSuchMethodError: org.semanticweb.owlapi.model.OWLDocumentFormat.isPrefixOWLOntologyFormat()Z
at org.swrlapi.factory.DefaultIRIResolver.updatePrefixes(DefaultIRIResolver.java:165)
at org.swrlapi.factory.DefaultSWRLAPIOWLOntology.(DefaultSWRLAPIOWLOntology.java:163)
at org.swrlapi.factory.SWRLAPIInternalFactory.createSWRLAPIOntology(SWRLAPIInternalFactory.java:266)
at org.swrlapi.factory.DefaultSWRLRuleAndQueryEngineFactory.createSWRLRuleEngine(DefaultSWRLRuleAndQueryEngineFactory.java:53)
... 3 more

I did load the swrl module into the libraries in intellij. I am attaching the screen shot of the libraries in the project, just in case it would be easy for you to verify whether I loaded the modules correctly.

from openllet.

You have swrlapi 2.0.5 still in the classpath. Needs to go and be replaced with the fresh build. Make sure you change the swrlapi version to something different, to ensure intellij cannot get confused.

from openllet.

Hi Ignazio,
I understood where I made the mistake, I removed the maven dependencies for both the swrl api and drools engine and built locally both the dependencies by downloading zip files and used 'mvn install clean' and 'mvn package' and imported them into the project.

from openllet.