Define own feedback messages in Wicket

Question

How do I define my own feedback messages in Wicket? For example: if I give an incorrect username, I want to get an error message like \"The user name in incorrect, try to login

Answer 1

You can use an anonymous IValidationError class and the messageSource.getMessage method to get a custom message from your property file:

error(new IValidationError() {
    @Override
    public Serializable getErrorMessage(IErrorMessageSource messageSource) {
        //create a list of the arguments that you will use in your message string
        Map vars = new HashMap();
        vars.put("invalidUsername", getInvalidUsernameInput());

        //get the message string from the property file
        return messageSource.getMessage("mysettings.invalid_username", vars);
    }
});

Sample property file:

mysettings.invalid_username=The user name "${invalidUsername}" is incorrect.