Method Details

• get

  public static <T> T get(Class<T> type)

  Gets the current instance of a specific type if available.

  Type Parameters:

  T - the instance type

  Parameters:

  type - the class to get an instance of

  Returns:

  the current instance or the provided type, or null if there is no current instance.

• set

  public static <T> void set(Class<T> type, T instance)

  Sets the current instance of the given type.

  Type Parameters:

  T - the instance type

  Parameters:

  type - the class that should be used when getting the current instance back

  instance - the actual instance

  See Also:

  • ThreadLocal

• clearAll

  public static void clearAll()

  Clears all current instances.

• restoreInstances

  public static void restoreInstances(Map<Class<?>,CurrentInstance> old)

  Restores the given instances to the given values. Note that this should only be used internally to restore Vaadin classes.

  Parameters:

  old - A Class -< CurrentInstance map to set as current instances

• getInstances

  public static Map<Class<?>,CurrentInstance> getInstances()

  Gets the currently set instances so that they can later be restored using restoreInstances(Map).

  Returns:

  a map containing the current instances

• setCurrent

  public static Map<Class<?>,CurrentInstance> setCurrent(UI ui)

  Sets current instances for the UI and all related classes. The previously defined values can be restored by passing the returned map to restoreInstances(Map).

  Parameters:

  ui - The UI

  Returns:

  A map containing the old values of the instances that this method updated.

• setCurrent

  public static Map<Class<?>,CurrentInstance> setCurrent(VaadinSession session)

  Sets current instances for the VaadinSession and all related classes. The previously defined values can be restored by passing the returned map to restoreInstances(Map).

  Parameters:

  session - The VaadinSession

  Returns:

  A map containing the old values of the instances this method updated.