Examples of javax.jdo.PersistenceManager.detachCopy()

javax.jdo.PersistenceManager.detachCopy()
Detach the specified instance from the PersistenceManager. The flags for detachment (DETACH_LOAD_FIELDS and DETACH_UNLOAD_FIELDS) and the active fetch groups determine the scope of fetching for the graph of instances reachable from the pc parameter. The state of fields in the affected instances is as specified by the FetchPlan. @param pc the instance to detach @return the detached instance @see #detachCopyAll(Object[]) @since 2.0

    
    PersistenceManager pm = pmf.getPersistenceManager();
    pm.currentTransaction().begin();
    pm.makePersistent(c);
    //detach the team while it is persistent-new: the object must be flushed before being detached
    Team copyOfT = (Team) pm.detachCopy(t);
    try {
      assertNotNull(copyOfT);
      assertEquals("Town of team and detached team are not the same", t.getTown(), copyOfT.getTown());
      assertEquals("Coach experience of team and detached team are not the same",t.getCoach().getExperience(), copyOfT.getCoach().getExperience());
      assertEquals("Coach name of team and detached team are not the same",t.getCoach().getName(), copyOfT.getCoach().getName());

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    pm.currentTransaction().commit();
    //update and detach
    pm.currentTransaction().begin();
    c.setExperience(10);
    //detach the team while it is persistent-dirty: the object must be flushed before being detached
    Team copyOfT = (Team) pm.detachCopy(t);
    pm.currentTransaction().commit();
    try {
      assertEquals(10, copyOfT.getCoach().getExperience());
      logger.log(BasicLevel.DEBUG, copyOfT.toString());
    } catch(Exception e) {

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    //delete
    pm.currentTransaction().begin();
    pm.deletePersistent(c);
    try {
      //detach the coach c while it is persistent-deleted: an exception must be thrown
      pm.detachCopy(c);
      pm.currentTransaction().commit();
    } catch (Exception e) {


        assertEquals("Wrong exception thrown: " + e.getMessage(),
                JDOUserException.class, e.getClass());

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    pm.currentTransaction().begin();
    pm.deletePersistent(p);
    try{
      // detach the coach c while it is persistent-deleted: 
        // an exception must be thrown
      pm.detachCopy(c);
      pm.currentTransaction().commit();
    } catch (Exception e) {
        assertEquals("Wrong exception thrown: " + e.getMessage(),
                JDOUserException.class, e.getClass());
    } finally {

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        Team copyOfT = null;
        while (itr.hasNext()) {
          Team team = (Team) itr.next();
          assertEquals("The town should be " + t.getTown(), t.getTown(), team.getTown());
          //detach the team t
          copyOfT = (Team) pm.detachCopy(team);
        }
        query.close(collection);
        extent.closeAll();
      assertNotNull(copyOfT);
      assertEquals("Town of team and detached team are not the same", t.getTown(), copyOfT.getTown());

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      //make persistent the coach
      pm.currentTransaction().begin();
      pm.makePersistent(c);
      pm.currentTransaction().commit();
      //detach a copy
      Coach copyOfC = (Coach) pm.detachCopy(c);
      //create a team referencing the detached coach
      Team t = new Team("LeMans",null, null);
      t.setCoach(copyOfC);
      //make persistent the team
      pm.currentTransaction().begin();

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    pm.makePersistent(c);
    pm.makePersistent(f);
    pm.currentTransaction().commit();
    try {
      //detach the car c
      Car copyOfC = (Car) pm.detachCopy(c);
      assertNotNull(copyOfC);
      assertEquals(c.getName(), copyOfC.getName());
      assertEquals(c.getColor(), copyOfC.getColor());
      assertEquals(c.getNbOfWheels(), copyOfC.getNbOfWheels());
      assertEquals(c.getType(), copyOfC.getType());

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      assertEquals(c.getNbOfWheels(), copyOfC.getNbOfWheels());
      assertEquals(c.getType(), copyOfC.getType());
      //  print the car out
      logger.log(BasicLevel.DEBUG, copyOfC.toString());
      //detach the formula one f
      FormulaOne copyOfF = (FormulaOne) pm.detachCopy(f);
      assertNotNull(copyOfF);
      assertEquals(f.getName(), copyOfF.getName());
      assertEquals(f.getColor(), copyOfF.getColor());
      assertEquals(f.getNbOfWheels(), copyOfF.getNbOfWheels());
      assertEquals(f.getType(), copyOfF.getType());

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    logger.log(BasicLevel.DEBUG, "*************testDetachNonPersistentInherited*****************");
    FormulaOne f = new FormulaOne("sauber", 4, "blue", 274);
    PersistenceManager pm = pmf.getPersistenceManager();
    pm.currentTransaction().begin();
    //    detach the formula one f while it is not persistent
    FormulaOne copyOfF = (FormulaOne) pm.detachCopy(f);
    assertTrue(((JDOPersistentObjectItf) f).jdoIsPersistent());
    pm.currentTransaction().commit();
    try {
      assertNotNull(copyOfF);
      assertEquals(f.getName(), copyOfF.getName());

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    //delete
    pm.currentTransaction().begin();
    pm.deletePersistent(f);
    try{
      //detach the coach c while it is persistent-deleted: an exception must be thrown
      pm.detachCopy(f);
    } catch(Exception e){
        assertEquals("Wrong exception thrown: ",JDOUserException.class, e.getClass());
    } finally {
      if (pm.currentTransaction().isActive())
        pm.currentTransaction().rollback();

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