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POIssues to list classes and subclasses with Jena
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  1. POIssues to list classes and subclasses with Jena
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    copied!<p>I'm not getting to list all subclasses of a class. I list the classes, my algorithm checks if each class has a subclass. If true, was to list all subclasses. But this doesn´t happen, it seems to ignore the condition "if (essaClasse.hasSubClass). Can anyone help me? Bellow the code part.</p> <p>Thanks!</p> <p>Debora (Rio de Janeiro - Brasil)</p> <p>The full code:</p> <pre><code>package testejena; import com.hp.hpl.jena.ontology.OntClass; import com.hp.hpl.jena.ontology.OntModel; 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 = "OBRecortada3.owl"; public static void main(String args[]) { try { //create the reasoning model using the base OntModel inf = ModelFactory.createOntologyModel(); // 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/OntologyBase.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(e.getMessage()); } } }} </code></pre>
 

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