Hi Chris,
it was a bug - the updated distribution (there was typo in the link from the
previous mail to the list)
http://www.ontotext.com/owlim/v3.0.a/owlim-beta5-sesame-2.0.zip
contain also a fix for this issue
regards,
Damyan
- Original Message -
From: "Chris Halaschek" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, April 09, 2008 10:59 PM
Subject: [OWLIM-discussion] Class cast exception in OWLIM 3.0
> Hi,
>
> I seem to get a class cast exception when browsing my OWLIM KB via the
> Sesame Workbench web app. Currently, my configuration is as follows:
>
> - OWLIM 3.0 Beta 4
> - Sesame 2.0
> - Tomcat 6
>
> The exception shows up in the OWLIM and Tomcat logs when I browse to
> various object properties in the KB. I've also tried to issue SPARQL
> queries for triples involving the object properties in the KB that
> cause the exception when browsed to in the Workbench web app and no
> results are returned even though the original OWL ontology contains
> various assertions involving these properties (clearly, at minimum
> there should be basic rdf type and subproperty assertions).
>
> I looked into our ontology (which is perfectly valid RDF) and was able
> to isolate the problem to what appears to be interactions between
> inverse and symmetric properties. Perhaps this is causing a problem
> when loading the KB into OWLIM (note however, that I do not see any
> errors related to this in the log files).
>
> Below is a trivial ontology that causes the issue. Clearly, one can
> remove the inverse property assertion for
> 'http://example.com#sampleInverseProperty' on itself, however this
> should still be valid RDF and not cause problems for OWLIM (at least
> that's my understanding). Interestingly, if this assertion is removed,
> then the problem is resolved.
>
>
>
>
> http://www.w3.org/2002/07/owl#"; >
>http://www.w3.org/1999/02/22-rdf-syntax-ns#"; >
> ]>
>
> http://example.com#";
> xml:base="http://example.com#";
> xmlns:owl="http://www.w3.org/2002/07/owl#";
> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Additionally, here is the actual exception thrown when browsing to the
> property 'http://example.com#sampleInverseProperty':
>
>
> Exeception:
> -
>
> org.springframework.web.util.NestedServletException: Request
> processing failed; nested exception is java.lang.ClassCastException:
> org.openrdf.model.impl.URIImpl cannot be cast to
> org.openrdf.model.Literal
> org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:472)
> org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:415)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
>
>
> root cause
>
> java.lang.ClassCastException: org.openrdf.model.impl.URIImpl cannot be
> cast to org.openrdf.model.Literal
> com.ontotext.trree.owlim_ext.CustomLiteralImpl.getLabel(Unknown Source)
> org.openrdf.rio.turtle.TurtleWriter.writeLiteral(TurtleWriter.java:355)
> org.openrdf.rio.turtle.TurtleWriter.writeValue(TurtleWriter.java:302)
> org.openrdf.rio.turtle.TurtleWriter.handleStatement(TurtleWriter.java:230)
> org.openrdf.rio.trig.TriGWriter.handleStatement(TriGWriter.java:129)
> org.openrdf.repository.sail.SailRepositoryConnection.exportStatements(SailRepositoryConnection.java:209)
> org.openrdf.http.server.repository.statements.ExportStatementsView.render(ExportStatementsView.java:99)
> org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1123)
> org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:860)
> org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:774)
> org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:460)
> org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:415)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
>
>
>
> Any help you can offer would be greatly appreciated.
>
> Best,
> Chris
>
> --
> Christian Halaschek-Wiener, Ph.D.
> Web page: http://www.mindswap.org/~chris
>
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