Exemplo n.º 1
0
  /** Fills <tt>m</tt> with statements from <tt>s</tt> and returns it. */
  public static Model toModel(Set s, Model m) throws ModelException {

    Iterator it = s.iterator();
    while (it.hasNext()) {
      Object o = it.next();
      if (o instanceof Statement) m.add((Statement) o);
    }
    return m;
  }
Exemplo n.º 2
0
 /**
  * Example the conclusions graph for introduction of restrictions which require a comprehension
  * rewrite and declare new (anon) classes for those restrictions.
  */
 public void comprehensionAxioms(Model premises, Model conclusions) {
   // Comprehend all restriction declarations and note them in a map
   Map<Resource, Resource> comprehension = new HashMap<>();
   StmtIterator ri = conclusions.listStatements(null, RDF.type, OWL.Restriction);
   while (ri.hasNext()) {
     Resource restriction = ri.nextStatement().getSubject();
     StmtIterator pi = restriction.listProperties(OWL.onProperty);
     while (pi.hasNext()) {
       Resource prop = (Resource) pi.nextStatement().getObject();
       StmtIterator vi = restriction.listProperties();
       while (vi.hasNext()) {
         Statement rs = vi.nextStatement();
         if (!rs.getPredicate().equals(OWL.onProperty)) {
           // Have a restriction on(prop) of type rs in the conclusions
           // So assert a premise that such a restriction could exisit
           Resource comp =
               premises
                   .createResource()
                   .addProperty(RDF.type, OWL.Restriction)
                   .addProperty(OWL.onProperty, prop)
                   .addProperty(rs.getPredicate(), rs.getObject());
           comprehension.put(restriction, comp);
         }
       }
     }
   }
   // Comprehend any intersectionOf lists. Introduce anon class which has the form
   // of the intersection expression.
   // Rewrite queries of the form (X intersectionOf Y) to the form
   //   (X equivalentClass ?CC) (?CC intersectionOf Y)
   StmtIterator ii = conclusions.listStatements(null, OWL.intersectionOf, (RDFNode) null);
   List<Statement> intersections = new ArrayList<>();
   while (ii.hasNext()) {
     intersections.add(ii.nextStatement());
   }
   for (Statement is : intersections) {
     // Declare in the premises that such an intersection exists
     Resource comp =
         premises
             .createResource()
             .addProperty(RDF.type, OWL.Class)
             .addProperty(
                 OWL.intersectionOf, mapList(premises, (Resource) is.getObject(), comprehension));
     // Rewrite the conclusions to be a test for equivalence between the class being
     // queried and the comprehended interesection
     conclusions.remove(is);
     conclusions.add(is.getSubject(), OWL.equivalentClass, comp);
   }
   // Comprehend any oneOf lists
   StmtIterator io = conclusions.listStatements(null, OWL.oneOf, (RDFNode) null);
   while (io.hasNext()) {
     Statement s = io.nextStatement();
     Resource comp = premises.createResource().addProperty(OWL.oneOf, s.getObject());
   }
 }
Exemplo n.º 3
0
  /**
   * @return a new model in which all occurrences of the old namespace are replaced by the new one.
   *     All replaced resources are summarized in the map if not null. If resourcesToIgnore != null,
   *     ignore resources listed there.
   */
  public static Model replaceNamespace(Model m, String o, String n, Map o2n, Set resourcesToIgnore)
      throws ModelException {

    Model res = m.create();
    NodeFactory f = m.getNodeFactory();
    Enumeration en = m.elements();
    while (en.hasMoreElements()) {

      Statement st = (Statement) en.nextElement();
      res.add(replaceNamespace(st, o, n, f, o2n, resourcesToIgnore));
    }
    return res;
  }
Exemplo n.º 4
0
  /** returns true if old triples from r were removed */
  public static boolean setUniqueObject(
      Model r, Resource subject, Resource predicate, RDFNode object) throws ModelException {

    Model old = r.find(subject, predicate, null);
    SetOperations.subtract(r, old);
    Statement stmt = get1(old);

    if (subject == null && stmt != null) subject = stmt.subject();
    if (predicate == null && stmt != null) predicate = stmt.predicate();

    r.add(r.getNodeFactory().createStatement(subject, predicate, object));
    return !old.isEmpty();
  }
Exemplo n.º 5
0
  /**
   * @return a new model in which all occurrences of the old resources are replaced by the new ones.
   *     Returns number replacements done.
   */
  public static int replaceResources(Model m, Map o2n) throws ModelException {

    NodeFactory f = m.getNodeFactory();
    Enumeration en = m.elements();

    Model toRemove = m.create();
    Model toAdd = m.create();

    while (en.hasMoreElements()) {

      Statement st = (Statement) en.nextElement();
      Statement st_n = replaceResources(st, f, o2n);

      if (st_n != st) { // yes, pointer comparison
        toAdd.add(st_n);
        toRemove.add(st);
      }
    }

    SetOperations.subtract(m, toRemove);
    SetOperations.unite(m, toAdd);

    return toAdd.size();
  }
Exemplo n.º 6
0
  /**
   * @return a new model in which all occurrences of the old resources are replaced by the new ones.
   *     Returns number replacements done.
   */
  public static int replaceResources(Model src, Model dest, Map o2n) throws ModelException {

    NodeFactory f = src.getNodeFactory();
    Enumeration en = src.elements();

    int replaced = 0;

    while (en.hasMoreElements()) {

      Statement st = (Statement) en.nextElement();
      Statement st_n = replaceResources(st, f, o2n);
      dest.add(st_n);
      if (st_n != st) // yes, pointer comparison
      replaced++;
    }
    return replaced;
  }
Exemplo n.º 7
0
  public static void add(Model m, Resource subject, Resource predicate, RDFNode object)
      throws ModelException {

    m.add(m.getNodeFactory().createStatement(subject, predicate, object));
  }