Ejemplo n.º 1
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();
  }
Ejemplo n.º 2
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;
  }
Ejemplo n.º 3
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;
  }
Ejemplo n.º 4
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();
  }
Ejemplo n.º 5
0
  /** Creates a new unique unnamed resource. */
  public static Resource noname(Model m) throws ModelException {

    return m.getNodeFactory().createUniqueResource();
  }
Ejemplo n.º 6
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  public static void add(Model m, Resource subject, Resource predicate, RDFNode object)
      throws ModelException {

    m.add(m.getNodeFactory().createStatement(subject, predicate, object));
  }
Ejemplo n.º 7
0
 /** @param an RDF model to fill with triples. This frequently will be an empty model. */
 public ModelConsumer(Model empty) throws ModelException {
   this.model = empty;
   nodeFactory = model.getNodeFactory();
 }