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


      // Lazily load administrator list
      chapter.getAdministrators();


      // Detach chapter
      chapter = pm.detachCopy(chapter);
    } catch (JDOObjectNotFoundException e) {
      return null;
    } finally {
      pm.close();
    }

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      pm.getFetchPlan().setMaxFetchDepth(maxFetchDepth);
      if (fetchGroups != null)
        pm.getFetchPlan().setGroups(fetchGroups);


      return pm.detachCopy(order);
    } finally {
      pm.close();
    }
  }

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      }
      pm.getFetchPlan().setMaxFetchDepth(maxFetchDepth);
      if (fetchGroups != null)
        pm.getFetchPlan().setGroups(fetchGroups);


      return pm.detachCopy(offer);
    } finally {
      pm.close();
    }
  }

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    pm.currentTransaction().begin();
    pm.makePersistent(share1);
    pm.makePersistent(share2);
    pm.currentTransaction().commit();
    
    Share copyOfShare = (Share) pm.detachCopy((Object)share1);
    logger.log(BasicLevel.DEBUG, "share detached");
    SharePrice price = copyOfShare.getPrice(12,2004,11);
    if (price != null) {
        price.setPrice(new BigDecimal(99000));
    }

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    FetchPlan f = pm.getFetchPlan();
    logger.log(BasicLevel.DEBUG, "FG: " + f.getGroups());
    
    pm.currentTransaction().begin();
    Thesis detachedT3 = (Thesis) pm.detachCopy(thesis3);
    try{
      assertEquals(thesis3.getIsbn(), detachedT3.getIsbn());
      assertEquals(thesis3.getType(), detachedT3.getType());
      assertEquals(thesis3.getPageNb(), detachedT3.getPageNb());
      assertEquals(thesis3.getAuthor().getFirstName(), detachedT3.getAuthor().getFirstName());

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    logger.log(BasicLevel.DEBUG, "make persistent the team " + t.toString());
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    try {
      //detach the team t
      Team copyOfT = (Team) pm.detachCopy(t);
      assertNotNull(copyOfT);
      //print the team out
      logger.log(BasicLevel.DEBUG, copyOfT.toString());
      pm.currentTransaction().begin();
      //attach the team t

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    pm.currentTransaction().begin();
    logger.log(BasicLevel.DEBUG, "make persistent the team " + t.toString());
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //modify the team
    copyOfT.getCoach().setExperience(99);
    //print the team out
    logger.log(BasicLevel.DEBUG, "Copy of team " + copyOfT.toString());
    pm.currentTransaction().begin();

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    logger.log(BasicLevel.DEBUG, "make persistent the team " + t.toString());
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    try {
      //detach the team t
      Team copyOfT = (Team) pm.detachCopy(t);
      Coach newCoach = new Coach("c33", 15, new Team("DummyTeam",null,null));
      //  update the reference while detached
      copyOfT.setCoach(newCoach);
      //print the team out
      logger.log(BasicLevel.DEBUG, "Copy of team " + copyOfT.toString());

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    pm.currentTransaction().begin();
    logger.log(BasicLevel.DEBUG, "make persistent the team " + t.toString());
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    pm.close();
    //modify the coach
    copyOfT.getCoach().setExperience(99);
    //and modify the collection
    Iterator it = copyOfT.getPlayers().iterator();

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    logger.log(BasicLevel.DEBUG, "make persistent the team " + t.toString());
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    try {
      //detach the team t
      Team copyOfT = (Team) pm.detachCopy(t);
      assertNotNull(copyOfT);
      assertNotNull("Coach of detached team should not be null.", copyOfT.getCoach());
      //set null for the coach
      copyOfT.setCoach(null);
      assertNull(copyOfT.getCoach());

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