OWLReasoner.getReasonerVersion() causes NumberFormatException

[matentzn]

Using ELK 0.4.3

OWLReasoner r = ...;
System.out.println(r.getReasonerVersion());

Exception in thread "main" java.lang.NumberFormatException: For input string: "2016-01-11T13:41:15Z"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.parseInt(Integer.java:615)
at org.semanticweb.elk.owlapi.ElkReasoner.getReasonerVersion(ElkReasoner.java:638)

[matentzn]

(This is particularly relevant for when using ELK in conjunction with InferredOntologyGenerator methods, which rely, needlessly as I must admit, on the implementation of the Reasoner version method)

InferredOntologyGenerator iog = new InferredOntologyGenerator(r, generators); iog.fillOntology(df, odef_all_inferred);

[ykazakov]

Reproduced with:

	<dependencies>
		<dependency>
			<groupId>org.semanticweb.elk</groupId>
			<artifactId>elk-owlapi</artifactId>
			<version>0.4.3</version>
		</dependency>
		<dependency>
			<groupId>net.sourceforge.owlapi</groupId>
			<artifactId>owlapi-apibinding</artifactId>
			<version>4.5.1</version>
		</dependency>
	</dependencies>

Code:

		OWLOntology o = OWLManager.createOWLOntologyManager().createOntology();

		OWLReasoner r = (new ElkReasonerFactory()).createReasoner(o);

		System.out.println(r.getReasonerVersion());

[matentzn]

Reproduced with

 <dependency>
  <groupId>net.sourceforge.owlapi</groupId>
  <artifactId>owlapi-distribution</artifactId>
  <version>5.1.4</version>
</dependency>
<dependency> 
   <groupId>org.semanticweb.elk</groupId> 
   <artifactId>elk-owlapi5</artifactId> 
   <version>0.5.0-SNAPSHOT</version> 
</dependency> 

and

<dependency>
  <groupId>net.sourceforge.owlapi</groupId>
  <artifactId>owlapi-distribution</artifactId>
  <version>4.5.1</version>
</dependency>
<dependency> 
   <groupId>org.semanticweb.elk</groupId> 
   <artifactId>elk-owlapi4</artifactId> 
   <version>0.5.0-SNAPSHOT</version> 
</dependency> 

Same code as above.

[ykazakov]

@matentzn Which version of java do you use? I can reproduce the problem with Java 9, but not with Java 8 (for which the version appears to be 0.0.0.0)

[ykazakov]

Actually, even with Java 9 I can only reproduce this from Eclipse (after clean), but not from the command line. Weird...

[matentzn]

That is very strange. I only tested it in Eclipse as well (after maven update and maven clean). Java 1.8.0_161.

[ykazakov]

I figured out: I placed the test file into the same package org.semanticweb.elk.owlapi for which the version number is returned (via ElkReasoner.class.getPackage().getImplementationVersion())
This way java got confused as there are two packages with the same name, and returned the result non-deterministically.