EhowImportService.java

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package instruction.ros;

import ros.*;
import ros.pkg.comp_ehow.srv.EhowToOWL;
import instruction.exporter.owl.OWLExporter;


public class EhowImportService {

        Ros ros;
        NodeHandle n;
        OWLExporter owl_ex;
        
        public EhowImportService() {
                
                try {

                        // wait for Cyc to be available
                        // MT: does not work at the moment; there are lots of exceptions if a CycConnection
                        // has been tried to open while Cyc was not available and then successfully opened
                        //
//                      System.out.print("Waiting for OpenCyc..");
//                      int i=0;
//                      while(true) {
//                              try {
//                                      if((i++)%100==0)
//                                              System.out.print(".");
//                                      CycConnection cyc = new CycConnection();
//                                      System.out.println("\nCyc found: "+cyc.connectionInfo());
//                                      cyc.close();
//                                      break;
//                                      
//                              } catch (UnknownHostException e) { }
//                              catch (CycApiException e) { }
//                              catch (IOException e) { }
//                      }
                        
                        owl_ex = new OWLExporter();
                        
                        ros = Ros.getInstance();
                        ros.init("ehow_importer");
                        n = ros.createNodeHandle();
                        
                        n.advertiseService("/ehow_importer/ehow_to_owl",  new EhowToOWL(),  new EhowToOWLCallback());
                        ros.logInfo("Started ehow import service.");
                        
                        while(n.isValid())
                                ros.spinOnce();
                        
                } catch(RosException e) {
                        e.printStackTrace();
                }
        }
        
        class EhowToOWLCallback implements ServiceServer.Callback<EhowToOWL.Request, EhowToOWL.Response> {
                
                @Override
                public EhowToOWL.Response call(EhowToOWL.Request req) {

                        EhowToOWL.Response res = new EhowToOWL.Response();
                        res.owl_instructions="";

                        if (req.command != null && req.command.length() > 0) {
                                res.owl_instructions = owl_ex.convertHowtoToOWLOntology(req.command);
                        }

                        return res;
                }
        }

        public static void main(String args[]) {
                new EhowImportService();
        }
}