/**
* since Android invokes Application.onCreate() only after invoking all other components'
* onCreate(), here is a way to notify interested component that the application is available and
* ready
*/
protected void notifyObservers() {
for (final ApplicationAware aware : observers) {
if (K9.DEBUG) {
Log.v(K9.LOG_TAG, "Initializing observer: " + aware);
}
try {
aware.initializeComponent(this);
} catch (Exception e) {
Log.w(K9.LOG_TAG, "Failure when notifying " + aware, e);
}
}
}
/**
* Register a component to be notified when the {@link K9} instance is ready.
*
* @param component Never <code>null</code>.
*/
public static void registerApplicationAware(final ApplicationAware component) {
synchronized (observers) {
if (sInitialized) {
component.initializeComponent(K9.app);
} else if (!observers.contains(component)) {
observers.add(component);
}
}
}
/**
* Sets action properties based on the interfaces an action implements. Things like application
* properties, parameters, session attributes, etc are set based on the implementing interface.
*
* @param invocation an encapsulation of the action execution state.
* @throws Exception if an error occurs when setting action properties.
*/
public String intercept(ActionInvocation invocation) throws Exception {
final Object action = invocation.getAction();
final ActionContext context = invocation.getInvocationContext();
if (action instanceof ServletRequestAware) {
HttpServletRequest request = (HttpServletRequest) context.get(HTTP_REQUEST);
((ServletRequestAware) action).setServletRequest(request);
}
if (action instanceof ServletResponseAware) {
HttpServletResponse response = (HttpServletResponse) context.get(HTTP_RESPONSE);
((ServletResponseAware) action).setServletResponse(response);
}
if (action instanceof ParameterAware) {
((ParameterAware) action).setParameters(context.getParameters());
}
if (action instanceof ApplicationAware) {
((ApplicationAware) action).setApplication(context.getApplication());
}
if (action instanceof SessionAware) {
((SessionAware) action).setSession(context.getSession());
}
if (action instanceof RequestAware) {
((RequestAware) action).setRequest((Map) context.get("request"));
}
if (action instanceof PrincipalAware) {
HttpServletRequest request = (HttpServletRequest) context.get(HTTP_REQUEST);
if (request != null) {
// We are in servtlet environment, so principal information resides in HttpServletRequest
((PrincipalAware) action).setPrincipalProxy(new ServletPrincipalProxy(request));
}
}
if (action instanceof ServletContextAware) {
ServletContext servletContext = (ServletContext) context.get(SERVLET_CONTEXT);
((ServletContextAware) action).setServletContext(servletContext);
}
return invocation.invoke();
}
