Examples of com.hp.hpl.jena.rdf.model.ModelChangedListener

com.hp.hpl.jena.rdf.model.ModelChangedListener
The interface for classes that listen for model-changed events. In all cases, the argument is [a copy of] the item that has been presented to the model, or its underlying graph, for addition or removal. For an add, the item [or parts of that item] may have already been present in the model; for remove, the item [or parts of it] need not have been absent from the item.
NOTE that the listener is supplied with more-or-less faithful copies of the original items that were added to, or removed from, the model. In particular, graph-level updates to the model appear as statements, not triples.

   * Test that the null listener doesn't appear to do anything. Or at least
   * doesn't crash ....
   */
  public void testNullListener()
  {
    final ModelChangedListener NL = new NullListener();
    model.register(NL);
    model.add(ModelHelper.statement(model, "S P O "));
    model.remove(ModelHelper.statement(model, "X Y Z"));
    model.add(ModelHelper.statements(model, "a B c; d E f"));
    model.remove(ModelHelper.statements(model, "g H i; j K l"));

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   * Test that the null listener doesn't appear to do anything. Or at least
   * doesn't crash ....
   */
  public void testNullListener()
  {
    final ModelChangedListener NL = new NullListener();
    model.register(NL);
    model.add(ModelHelper.statement(model, "S P O "));
    model.remove(ModelHelper.statement(model, "X Y Z"));
    model.add(ModelHelper.statements(model, "a B c; d E f"));
    model.remove(ModelHelper.statements(model, "g H i; j K l"));

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    {
        Store store = SDBTestUtils.createInMemoryStore() ;
        Dataset ds = SDBFactory.connectDataset(store) ;


        Model m = ds.getDefaultModel() ;
        ModelChangedListener listener = new StatementListener()
        {
            @Override
            public void addedStatement( Statement s )
            {
             System.out.println("Add: "+s) ;

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   * Test that the null listener doesn't appear to do anything. Or at least
   * doesn't crash ....
   */
  public void testNullListener()
  {
    final ModelChangedListener NL = new NullListener();
    model.register(NL);
    model.add(ModelHelper.statement(model, "S P O "));
    model.remove(ModelHelper.statement(model, "X Y Z"));
    model.add(ModelHelper.statements(model, "a B c; d E f"));
    model.remove(ModelHelper.statements(model, "g H i; j K l"));

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