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

    f.setNbOfWheels(3);
    f.setSpeedMax(300);
    pm.currentTransaction().commit();
    try {
      //detach the formula one while it is persistent-dirty: the object must be flushed before being detached
      FormulaOne copyOfF = (FormulaOne) pm.detachCopy(f);
      assertEquals(f.getName(), copyOfF.getName());
      assertEquals(f.getColor(), copyOfF.getColor());
      assertEquals(3, copyOfF.getNbOfWheels());
      assertEquals(f.getType(), copyOfF.getType());
      assertEquals(300, copyOfF.getSpeedMax());

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      try {
        //Object oid = pm.newObjectIdInstance(Person.class, "" + personId);
        Person p = (Person) pm.getObjectById(personId, false);
        if (p != null) {
          p.getAddress();
          result = (Person) pm.detachCopy(p);
        }
      } catch (Exception e) {
        logger.log(BasicLevel.DEBUG, "Person with Key=" + personId + " not found.");
      } finally {
        pm.close();

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      try {
        Object oid = pm.newObjectIdInstance(Person.class, "" + personId);
        Person p = (Person) pm.getObjectById(oid, false);
        if (p != null) {
          p.getAddress();
          result = (Person) pm.detachCopy(p);
        }
      } catch (Exception e) {
        logger.log(BasicLevel.DEBUG, "Person with Key=" + personId + " not found.");
      } finally {
        pm.close();

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      //set the fetch group to listeIntervenants
      FetchPlan fp = pm.getFetchPlan();
      fp.clearGroups().addGroup("listeIntervenants");
      //detach the  intervenant
      IntervenantHelper copyOfIntervenant1 = (IntervenantHelper) pm.detachCopy(intervenant1);
      assertNotNull(copyOfIntervenant1);
      assertEquals("Nomep of intervenant1 and its detached copy are not the same.", intervenant1.getNomep(), copyOfIntervenant1.getNomep());
      Collection conv = intervenant1.getConventions();
      Collection copyConv = copyOfIntervenant1.getConventions();
      assertEquals("Size of conventions not the same for intervenant1 and its detached copy.", conv.size(), copyConv.size());

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    pm.currentTransaction().begin();
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    pm.currentTransaction().begin();
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //commit the tx
    pm.currentTransaction().commit();
    pm.currentTransaction().begin();
    logger.log(BasicLevel.DEBUG, "ATTACH BEGIN");
    try{

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    while(it.hasNext()){
      Player p = (Player) it.next();
      p.setAge(99);
    }
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //commit
    pm.currentTransaction().commit();
    pm.currentTransaction().begin();
    try{  
      //attach the team

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    //begin
    pm.currentTransaction().begin();
    //detach the team t
    Team copyOfT = null;
    try {
      copyOfT = (Team) pm.detachCopy(t);
      //  modify the coach
      t.setCoach(new Coach("c31", 10, t));
      Iterator it  = t.getPlayers().iterator();
      //modify the players
      while(it.hasNext()){

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    pm.currentTransaction().begin();
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    pm.currentTransaction().begin();
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //rollback the tx
    pm.currentTransaction().rollback();
    pm.currentTransaction().begin();
    try{  
      //attach the "invalid" team

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    while(it.hasNext()){
      Player p = (Player) it.next();
      p.setAge(99);
    }
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //rollback
    pm.currentTransaction().rollback();
    pm.currentTransaction().begin();
    try{  
      //attach the team

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    pm.makePersistent(t);
    pm.currentTransaction().commit();
    //begin
    pm.currentTransaction().begin();
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //modify the coach
    t.getCoach().setExperience(99);
    Iterator it  = t.getPlayers().iterator();
    //modify the players
    while(it.hasNext()){

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