Class ComponentEventBusUtil

Method Detail

• getEventDataExpressions

  public static LinkedHashMap<String,​Class<?>> getEventDataExpressions​(Class<? extends ComponentEvent<?>> eventType)

  Gets a map of event data expression (for DomListenerRegistration.addEventData(String) ) to Java type, with the same order as the parameters for the event constructor (as returned by getEventConstructor(Class)).

  Caches values and automatically uses the cached values when available.

  Parameters:

  eventType - the component event type

  Returns:

  a map of event expressions, ordered in constructor parameter order

• getEventConstructor

  public static <T extends ComponentEvent<?>> Constructor<T> getEventConstructor​(Class<T> eventType)

  Gets the constructor to use for firing a component event, of the given type, based on a DOM event.

  Type Parameters:

  T - the event type

  Parameters:

  eventType - the event type

  Returns:

  the constructor to use when creating an event from a DOM event

  Throws:

  IllegalArgumentException - if no suitable constructor was found

• isDomEventConstructor

  public static boolean isDomEventConstructor​(Constructor<?> constructor)

  Checks if the given constructor can be used when firing a ComponentEvent based on a DomEvent.

  Parameters:

  constructor - the constructor to check

  Returns:

  true if the constructor can be used, false otherwise