On 22/07/16 13:17, kumar rohit wrote:
I dont know if attaching screen shot is allowed or not, but kindly if you can check it.
You can see what we all see of your emails by looking in the archives: https://lists.apache.org/thread.html/43dbb59ca0b17f780957ed5bb5d430707ab6de516e11f77e79dbfcd5@%3Cusers.jena.apache.org%3E Badly broken code. https://lists.apache.org/thread.html/412dd17ef1f7ae8b77f564c36a7849b365aea50e643cfe21ace0e752@%3Cusers.jena.apache.org%3E No attachments Andy
After running the code , it has added the garbage classes to the file. User class is also there as I have created it, but again it has disappeared my classes in ontology. *Note:* I have added new class in the same file I have read it and used the same namespace of the ontology for new class (User class). My ontology uri is : *String ns="http://www.semanticweb.org/ontologies/2016/7/untitled-54/";* * * And I used this for *User* class also. On Fri, Jul 22, 2016 at 2:47 AM, Dave Reynolds <[email protected] <mailto:[email protected]>> wrote: On 22/07/16 10:44, kumar rohit wrote: Yes because the model.write() works but the FileWriter does not. I also tried something like this to append data but failed: FileOutputStream f1=new FileOutputStream(file, *true*); Any solution please you suggest to write it to the same file I have read from? You can't, at least not in RDF/XML format. As Lorenz says, you would have to read in the current file, add your new assertions, then write out the whole file again. Dave On Fri, Jul 22, 2016 at 2:22 AM, Lorenz B. < [email protected] <mailto:[email protected]>> wrote: Hello Dave, I think the problem is that he writes to another file - and I guess this one already contains some data. Of course the write method cannot append data, but just overwrites the file. Am I right? Anything else would sound like some magic. Otherwise, to append data, one would have to load it into a separate model and add data directly to this model. Kind regards, Lorenz On 22/07/16 09:58, kumar rohit wrote: The main() pass the required file and then just the GUI loads because we have to deal with a text field where user enter his name and we will create individual of that name. The main purpose of this code is to create individual (after user enter the name) and store it locally in a file *(either a separate file or to the file we have read **InputStream in =FileManager.get().open(file);*) It writes the required result to the console(model.write method) but when I try to write it in a file, it just remove all the data from the destination file and even the ontology URI. For writing to a file, I used these both methods but both does not work. (1) FileWriter out = new FileWriter( fileName ); try { model.write( out, "RDF/XML-ABBREV" );} 2) FileOutputStream out=new FileOutputStream(filename); RDFWriter d = model.getWriter("RDF/XML-ABBREV"); d.write(model,out,null); }catch(Exception e) {} Make sure you close the stream, that's probably the source of your random loss of output. The reason you see Seq and other such junk is because you are writing the whole model, with inference, and a default OntModel includes RDFS inference. Use model.write which for an OntModel defaults to writing just the base model. Also, unless you need inference use an explicit OntModelSpec which doesn't have any (e.g. OWL_MEM). Dave On Fri, Jul 22, 2016 at 12:30 AM, Lorenz B. < [email protected] <mailto:[email protected]>> wrote: 1.) This is not a minimal running example! that means, nobody can test it without some (in your case too much) effort to get it running. 2.) w.r.t. 1), look at your main() method, it reads a file and then? 2.) Please tell us exactly WHAT does not work and WHAT you expect. 3.) The OntModel object has a method write, not sure what you did there with calling getWriter and the like *When I run this program without writing it to the file, it runs smoothly. But when I copy it to a file (both newly created and existing file), sometime it adds the garbage claases to the file like Seq, Bag, Resource and most of the time it does nothing except it empties the destination file.* *I have copied the whole code except the code auto generated by netbeans* *public class NewJFrame extends javax.swing.JFrame {* * public static void readOntology(String file,OntModel model)* * {* * InputStream in =FileManager.get().open(file);* *if (in==null) {* *throw new IllegalArgumentException( "File: " + file + " not found");* *}* * model.read(in,null);* * //in.close();}}* private void read1(String str, OntModel model) { String ns=" http://www.semanticweb.org/ontologies/untitled-ontology-54/";; OntClass user = model.createClass(ns + "User"); OntClass user1 = model.getOntClass(ns + "User"); Individual janeSmith = user1.createIndividual(ns + str) try { String file="F://newontology.owl"; FileOutputStream f1=new FileOutputStream(file); RDFWriter d = model.getWriter("RDF/XML-ABBREV"); d.write(model,f1,null); }catch(Exception e) {} *private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { * *OntModel model=ModelFactory.createOntologyModel();* * String str=jTextField2.getText()* * read1(str, model); }}* * public static void main(String args[]) {* * OntModel model = ModelFactory.createOntologyModel();* * String file="F://updated.owl";* * readOntology(file , model );* *}* -- Lorenz Bühmann AKSW group, University of Leipzig Group: http://aksw.org - semantic web research center -- Lorenz Bühmann AKSW group, University of Leipzig Group: http://aksw.org - semantic web research center
