@Override
public ErrorMessage getErrorMessage() {

    Validator.InvalidValueException validationError = getValidationError();

    final ErrorMessage superError = getComponentError();

    if (superError == null && validationError == null
            && getCurrentBufferedSourceException() == null) {
        return null;
    }
    // Throw combination of the error types
    return new CompositeErrorMessage(
            new ErrorMessage[]{
                superError,
                AbstractErrorMessage
                .getErrorMessageForException(validationError),
                AbstractErrorMessage
                .getErrorMessageForException(
                        getCurrentBufferedSourceException())});
}
 

@Override
public ErrorMessage getErrorMessage() {
    ErrorMessage superError = super.getErrorMessage();
    if (!isReadOnly() && isRequired() && isEmpty()) {
        ErrorMessage error = AbstractErrorMessage.getErrorMessageForException(
                new com.vaadin.v7.data.Validator.EmptyValueException(getRequiredError()));
        if (error != null) {
            return new CompositeErrorMessage(superError, error);
        }
    }
    return superError;
}
 

@Override
public ErrorMessage getErrorMessage() {
    ErrorMessage superError = super.getErrorMessage();
    if (!textArea.isReadOnly() && isRequiredIndicatorVisible() && textArea.isEmpty()) {
        ErrorMessage error = AbstractErrorMessage.getErrorMessageForException(
                new com.vaadin.v7.data.Validator.EmptyValueException(getRequiredError()));
        if (error != null) {
            return new CompositeErrorMessage(superError, error);
        }
    }

    return superError;
}
 

@Override
public ErrorMessage getErrorMessage() {

    Validator.InvalidValueException validationError = getValidationError();

    final ErrorMessage superError = getComponentError();

    if (superError == null && validationError == null
            && getCurrentBufferedSourceException() == null) {
        return null;
    }
    // Throw combination of the error types
    return new CompositeErrorMessage(
            new ErrorMessage[]{
                superError,
                AbstractErrorMessage
                .getErrorMessageForException(validationError),
                AbstractErrorMessage
                .getErrorMessageForException(
                        getCurrentBufferedSourceException())});
}
 

public static void doDefault(ErrorEvent event) {
    Throwable t = event.getThrowable();
    if (t instanceof SocketException) {
        // Most likely client browser closed socket
        getLogger().info(
                "SocketException in CommunicationManager."
                        + " Most likely client (browser) closed socket.");
        return;
    }

    t = findRelevantThrowable(t);
    
    /*
     * Handle SpringSecurity 
     */
    if (t instanceof AccessDeniedException) {
    	
    	EventBus eventBus = SpringApplicationContext.getEventBus();
    	eventBus.publish(EventScope.UI, eventBus, new AccessDeniedEvent(t));
    	
    	getLogger().log(Level.FINE, "Access is denied", t);
    	return;
    }

    // Finds the original source of the error/exception
    AbstractComponent component = findAbstractComponent(event);
    if (component != null) {
        // Shows the error in AbstractComponent
        ErrorMessage errorMessage = AbstractErrorMessage
                .getErrorMessageForException(t);
        component.setComponentError(errorMessage);
    }

    // also print the error on console
    getLogger().log(Level.SEVERE, "", t);
}