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

    pm.makePersistent(t);
    pm.currentTransaction().commit();
    //begin
    pm.currentTransaction().begin();
    //detach the team t
    Team copyOfT1 = (Team) pm.detachCopy(t);
    //detach the team t
    Team copyOfT2 = (Team) pm.detachCopy(t);
    //commit
    pm.currentTransaction().commit();

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    //begin
    pm.currentTransaction().begin();
    //detach the team t
    Team copyOfT1 = (Team) pm.detachCopy(t);
    //detach the team t
    Team copyOfT2 = (Team) pm.detachCopy(t);
    //commit
    pm.currentTransaction().commit();
    
    //modify the copy1
    copyOfT1.getCoach().setExperience(99);

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    pm.currentTransaction().begin();
    pm.makePersistent(f);
    pm.currentTransaction().commit();
    try {
      //detach the formula one while it is persistent-new: 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(f.getNbOfWheels(), copyOfF.getNbOfWheels());
      assertEquals(f.getType(), copyOfF.getType());
      assertEquals(f.getSpeedMax(), copyOfF.getSpeedMax());

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    pm.makePersistent(t);
    pm.currentTransaction().commit();
    //begin
    pm.currentTransaction().begin();
    //detach the team t
    Team copyOfT1 = (Team) pm.detachCopy(t);
    //detach the team t
    Team copyOfT2 = (Team) pm.detachCopy(t);
    //commit
    pm.currentTransaction().commit();

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    //begin
    pm.currentTransaction().begin();
    //detach the team t
    Team copyOfT1 = (Team) pm.detachCopy(t);
    //detach the team t
    Team copyOfT2 = (Team) pm.detachCopy(t);
    //commit
    pm.currentTransaction().commit();
    
    //modify the copy1
    copyOfT1.getCoach().setExperience(99);

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    PersistenceManager pm = pmf.getPersistenceManager();
    pm.currentTransaction().begin();
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //begin
    pm.currentTransaction().begin();
    //modify the coach
    t.getCoach().setExperience(99);
    Iterator it  = t.getPlayers().iterator();

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        c.setProf(prof);
        c.setStudents(col);
        pm.currentTransaction().begin();
        pm.makePersistent(c);
        Object oid = pm.getObjectId(c);
        Course copyOfC = (Course) pm.detachCopy(c);
        pm.currentTransaction().commit();
        pm.close();
    File f = new File(new File(new File("output"),"test"), "testSerializeWithCollection");
    if (f.exists()) {
      f.delete();

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    PersistenceManager pm = pmf.getPersistenceManager();
    pm.currentTransaction().begin();
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //begin
    pm.currentTransaction().begin();
    //modify the coach
    t.getCoach().setExperience(99);
    Iterator it  = t.getPlayers().iterator();

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    PersistenceManager pm = pmf.getPersistenceManager();
    pm.currentTransaction().begin();
    pm.makePersistent(t);
    pm.currentTransaction().commit();
    //detach the team t
    Team copyOfT = (Team) pm.detachCopy(t);
    //begin
    pm.currentTransaction().begin();
    //modify the coach
    t.getCoach().setExperience(99);
    Iterator it  = t.getPlayers().iterator();

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    pm.currentTransaction().commit();
    pm.currentTransaction().begin();
    //modify
     f.setNbOfWheels(1);
     //detach the team t
    FormulaOne copyOfF = (FormulaOne) pm.detachCopy(f);
    //rollback the tx : it invalids the copy
    pm.currentTransaction().rollback();
    //  print out
    logger.log(BasicLevel.DEBUG, "Copy of f1 " + copyOfF.toString());
    logger.log(BasicLevel.DEBUG, "rollback of the tx: the attach shouldn't work.");

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