Object onAction()

in tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Form.java [495:616]
71 lines of code
13 McCabe index (conditional complexity)

    Object onAction(EventContext context) throws IOException
    {
        beforeProcessSubmit(context);

        tracker.clear();

        formSupport = new FormSupportImpl(resources, validationId);

        environment.push(ValidationTracker.class, tracker);
        environment.push(FormSupport.class, formSupport);

        Heartbeat heartbeat = new HeartbeatImpl();

        environment.push(Heartbeat.class, heartbeat);

        heartbeat.begin();

        boolean didPushBeanValidationContext = false;

        try
        {
            resources.triggerContextEvent(EventConstants.PREPARE_FOR_SUBMIT, context, eventCallback);

            if (eventCallback.isAborted())
                return true;

            resources.triggerContextEvent(EventConstants.PREPARE, context, eventCallback);
            if (eventCallback.isAborted())
                return true;

            if (isFormCancelled())
            {
                executeStoredActions(true);

                resources.triggerContextEvent(EventConstants.CANCELED, context, eventCallback);
                if (eventCallback.isAborted())
                    return true;
            }

            environment.push(BeanValidationContext.class, new BeanValidationContextImpl(validate));

            didPushBeanValidationContext = true;

            executeStoredActions(false);

            heartbeat.end();

            formSupport.executeDeferred();

            fireValidateEvent(EventConstants.VALIDATE, context, eventCallback);

            if (eventCallback.isAborted())
            {
                return true;
            }

            afterValidate();

            // Let the listeners know about overall success or failure. Most
            // listeners fall into
            // one of those two camps.

            // If the tracker has no errors, then clear it of any input values
            // as well, so that the next page render will be "clean" and show
            // true persistent data, not value from the previous form
            // submission.

            if (!tracker.getHasErrors())
            {
                tracker.clear();
            }

            String eventType = tracker.getHasErrors()
                    ? EventConstants.FAILURE
                    : EventConstants.SUCCESS;

            resources.triggerContextEvent(eventType, context, eventCallback);

            if (eventCallback.isAborted())
            {
                return true;
            }

            // Lastly, tell anyone whose interested that the form is completely
            // submitted.

            resources.triggerContextEvent(EventConstants.SUBMIT, context, eventCallback);

            afterSuccessOrFailure();

            if (eventCallback.isAborted())
            {
                return true;
            }

            // For traditional request with no validation exceptions, re-render the
            // current page immediately, as-is.  Prior to Tapestry 5.4, a redirect was
            // sent that required that the tracker be persisted across requests.
            // See https://issues.apache.org/jira/browse/TAP5-1808

            if (tracker.getHasErrors() && !request.isXHR())
            {
                return STREAM_ACTIVE_PAGE_CONTENT;
            }

            // The event will not work its way up.

            return false;

        } finally
        {
            environment.pop(Heartbeat.class);
            environment.pop(FormSupport.class);

            environment.pop(ValidationTracker.class);

            if (didPushBeanValidationContext)
            {
                environment.pop(BeanValidationContext.class);
            }
        }
    }