Method Details

• initialize

  public void initialize(VaadinContext context, Map<Class<?>,Collection<Class<?>>> services, VaadinApplicationInitializationBootstrap bootstrap) throws jakarta.servlet.ServletException

  Description copied from interface: AbstractLookupInitializer

  Creates a new Lookup instance, initializes it and passes it to the provided bootstrap.

  The method should creates a new initialized Lookup instance. In some cases it's not possible to create the instance right away when the method is called. To be able to support this usecase the method contract doesn't require to return the Lookup instance. Instead the created instance should be passed to the provided bootstrap consumer once the instance is created and completely initialized. The bootstrap will start the application initialization which otherwise is postponed until a Lookup becomes available.

  The implementation must use the provided bootstrap to pass the Lookup instance otherwise the web application based on this LookupInitializer will never be bootstrapped.

  The provided services map contains service implementations found in application classpath using @HandlesTypes annotation declared for LookupServletContainerInitializer.

  Specified by:

  initialize in interface AbstractLookupInitializer

  Parameters:

  context - a Vaadin context to run initialization for

  services - the map of internal services with their implementations found in the application classpath

  bootstrap - the web application bootstrap

  Throws:

  jakarta.servlet.ServletException - if initialization failed

• createLookup

  protected Lookup createLookup(VaadinContext context, Map<Class<?>,Collection<Class<?>>> services)

  Creates a lookup based on provided services.

  Parameters:

  context - a Vaadin context to create a lookup for

  services - the service objects mapped to the service type to create a lookup

  Returns:

  the lookup instance created with provided services

• ensureService

  protected <T> void ensureService(Map<Class<?>,Collection<Class<?>>> services, Class<T> serviceType, Class<? extends T> serviceImpl)

  Ensures that provided services contain implementation for serviceType SPI.

  The default serviceImpl implementation will be set as the service into services if there is no other services available.

  Parameters:

  services - map of internal services

  serviceType - SPI type

  serviceImpl - the default SPI implementation

• instantiate

  protected <T> T instantiate(Class<T> serviceClass, Class<?> implementation)

  Instantiates service implementation type with the given serviceClass .

  Type Parameters:

  T - service type

  Parameters:

  serviceClass - service class

  implementation - service implementation class

  Returns:

  an instantiated service implementation object

• getDefaultImplementations

  public static Set<Class<?>> getDefaultImplementations()

  Returns the default implementation classes included.

  This method is public only for internal purposes.

  Returns:

  a set of classes