Examples of com.hp.hpl.jena.rdf.model.Model.begin()

com.hp.hpl.jena.rdf.model.Model.begin()
Begin a new transation.
All changes made to a model within a transaction, will either be made, or none of them will be made.
@return this model to enable cascading.

                        // create store                 
                        store = StoreFactory.create(desc, sdbConn);
        
                        // save model
                        Model m = SDBFactory.connectDefaultModel(store) ;               
                        m.begin();
                        m.removeAll();
                        m.add(model);
                        m.commit();


                    } catch (Exception e) {

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  @Test public void rollback() {
    Model model = SDBFactory.connectDefaultModel(store);
    
    assertTrue("Initially empty", model.isEmpty());
    model.begin();
    model.add(RDF.type, RDF.type, RDF.type);
    assertTrue("Uncommited triple can be seen", model.contains(RDF.type, RDF.type, RDF.type));
    model.abort();
    assertTrue("Nothing was added, the add aborted", model.isEmpty());
    model.add(RDF.type, RDF.type, RDF.type);

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    assertTrue("Uncommited triple can be seen", model.contains(RDF.type, RDF.type, RDF.type));
    model.abort();
    assertTrue("Nothing was added, the add aborted", model.isEmpty());
    model.add(RDF.type, RDF.type, RDF.type);
    assertEquals("Model contains 1 triple", 1l, model.size());
    model.begin();
    model.remove(RDF.type, RDF.type, RDF.type);
    model.abort();
    assertEquals("Model still contains 1 triple", 1l, model.size());
  }

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