RosJava program to test Jena libraries import

Listener.java

package com.github.rosjava.jinchimiru.jinchimiru_sub_project;

import org.apache.commons.logging.Log;
import org.ros.message.MessageListener;
import org.ros.namespace.GraphName;
import org.ros.node.AbstractNodeMain;
import org.ros.node.ConnectedNode;
import org.ros.node.NodeMain;
import org.ros.node.topic.Subscriber;


import org.apache.jena.ontology.OntModel;

/**
 * A simple {@link Subscriber} {@link NodeMain}.
 */
public class Listener extends AbstractNodeMain {


  OntModel tbox; 

  @Override
  public GraphName getDefaultNodeName() {
    return GraphName.of("rosjava/listener");
  }

  @Override
  public void onStart(ConnectedNode connectedNode) {
    final Log log = connectedNode.getLog();
    Subscriber<std_msgs.String> subscriber = connectedNode.newSubscriber("chatter", std_msgs.String._TYPE);
    subscriber.addMessageListener(new MessageListener<std_msgs.String>() {
      @Override
      public void onNewMessage(std_msgs.String message) {
        log.info("I heard: \"" + message.getData() + "\"");
        
        // Let's try to create a basic ontology model
	      tbox = ModelFactory.createOntologyModel( OntModelSpec.OWL_MEM );
      }
    });
   
  }
}