Examples of javax.persistence.EntityManager.clear()

javax.persistence.EntityManager.clear()
Clear the persistence context, causing all managed entities to become detached. Changes made to entities that have not been flushed to the database will not be persisted. @throws IllegalStateException if this EntityManager has been closed

    EntityManager em = getPersistenceContext(false);
    try {
      return em.createNativeQuery(arg0, arg1);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public Query createNativeQuery(String arg0, String arg1)
  {

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    EntityManager em = getPersistenceContext(false);
    try {
      return em.createNativeQuery(arg0, arg1);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public Query createQuery(String arg0)
  {

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    EntityManager em = getPersistenceContext(false);
    try {
      return em.createQuery(arg0);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public <T> T find(Class<T> arg0, Object arg1)
  {

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    EntityManager em = getPersistenceContext(false);
    try {
      return em.find(arg0, arg1);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  /**
   * @throws TransactionRequiredException

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    EntityManager em = getPersistenceContext(false);
    try {
      return em.getReference(arg0, arg1);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public EntityTransaction getTransaction()
  {

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    EntityManager em = getPersistenceContext(false);
    try {
      em.setFlushMode(arg0);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public <T> TypedQuery<T> createNamedQuery(String arg0, Class<T> arg1)
  {

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    EntityManager em = getPersistenceContext(false);
    try {
      return em.createNamedQuery(arg0, arg1);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public <T> TypedQuery<T> createQuery(CriteriaQuery<T> arg0)
  {

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    EntityManager em = getPersistenceContext(false);
    try {
      return em.createQuery(arg0);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public <T> TypedQuery<T> createQuery(String arg0, Class<T> arg1)
  {

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    EntityManager em = getPersistenceContext(false);
    try {
      return em.createQuery(arg0, arg1);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  public void detach(Object arg0)
  {

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    EntityManager em = getPersistenceContext(false);
    try {
      return em.find(arg0, arg1, arg2);
    } finally {
      if(em == detachedManager)
        em.clear();
    }
  }


  /**
   * @throws TransactionRequiredException if lock mode is not NONE

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