Looks like you need to include an additional library for
org.apache.commons.logging.LogFactory class.
Regards,
Milorad
>________________________________
> From: aarthi <aarthirajara...@gmail.com>
>To: Milorad Tosic <mbto...@yahoo.com>; users <users@jena.apache.org>
>Sent: Saturday, March 30, 2013 1:56 PM
>Subject:
>
>hi..
> i'm doing my project with ontology. i need to retrieve the class and
>properties names in order to compare them for equality. to retrieve
>the class an property names i'm using a
>java code. i have attached that code with this mail. but i got some
>error, I don't know how to resolve that. for that i had import
>com.hp.hpl.jena package. i dont get the classpath files and javadoc
>files. is it enough if i add only the source package? pls help me....
>
>this is my code:
>
>
>//package testejena;
>import com.hp.hpl.jena.ontology.OntClass;
>import com.hp.hpl.jena.ontology.OntModel;
>import com.hp.hpl.jena.ontology.OntModelSpec;
>import com.hp.hpl.jena.rdf.model.ModelFactory;
>import com.hp.hpl.jena.util.FileManager;
>import com.hp.hpl.jena.util.iterator.ExtendedIterator;
>import java.io.InputStream;
>import java.util.Iterator;
>
>public class testeProp {
> static final String inputFileName = "newspaper.owl";
> public static void main(String args[]) {
> try {
> //create the reasoning model using the base
> OntModel inf =
>ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM);
>
> // use the FileManager to find the input file
> InputStream in = FileManager.get().open(inputFileName);
> if (in == null) {
> throw new IllegalArgumentException("File: " +
>inputFileName + " not found");
> }
>
> inf.read(in, "");
>
> String URI =
>"http://www.owl-ontologies.com/Ontology1363337688.owl#";;
>
> ExtendedIterator classes = inf.listClasses();
> while (classes.hasNext()) {
> OntClass essaClasse = (OntClass) classes.next();
>
> String vClasse = essaClasse.getLocalName().toString();
>
> if (essaClasse.hasSubClass()) {
> System.out.println("Classe: " + vClasse);
> OntClass cla = inf.getOntClass(URI + vClasse);
> for (Iterator i = cla.listSubClasses(); i.hasNext();) {
> OntClass c = (OntClass) i.next();
> System.out.print(" " + c.getLocalName() + " " +
>"\n");
> }
> }
> }
> } catch (Exception e) {
> System.out.println("there may be error");
> System.out.println(e.getMessage());
> }
> }
>}
>
>
>--------------------------------------------------------------------------------------------------
>if i run my program i got the following error:
>
>
>Exception in thread "main" java.lang.NoClassDefFoundError:
>org/apache/commons/logging/LogFactory
> at
>com.hp.hpl.jena.rdf.model.impl.PropertyImpl.<clinit>(PropertyImpl.java:58)
> at
>com.hp.hpl.jena.enhanced.BuiltinPersonalities.<clinit>(BuiltinPersonalities.java:28)
> at com.hp.hpl.jena.rdf.model.impl.ModelCom.<init>(ModelCom.java:51)
> at
>com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel(ModelFactory.java:119)
> at
>com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel(ModelFactory.java:113)
> at
>com.hp.hpl.jena.rdf.model.impl.ModelSpecImpl.<clinit>(ModelSpecImpl.java:56)
> at testeProp.main(testeProp.java:16)
>Caused by: java.lang.ClassNotFoundException:
>org.apache.commons.logging.LogFactory
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
> ... 7 more
>Java Result: 1
>BUILD SUCCESSFUL (total time: 0 seconds)
>
>
>
>
>
>
>please anyone help me...
>
>
>
