Question

In the JSF project I’m working Exceptions thrown by Beans are usually handled by JSF redirecting the user to an error page, but when they are raised inside a Bean validation method, JSF handles them displaying in the relative <h:message> tag the Exception message, instead.

I would like that Exceptions raised in validation methods be handled as the other Exceptions raised from Beans are. Is there a way to achieve that?

The kind of validation I’m using is through backing-bean validator method, for example in JSF page:

<h:inputText value="#{Bean.field}" validator="#{Bean.validate}" />

and, in backing bean code:

public void validate(FacesContext context, UIComponent component, Object value){
   // validation logic here
}

Thanks, Andrea

Answer 1

This is “by design”.

Transform that validator into a fullworthy class which implements Validator. Any exceptions other than ValidatorException thrown in there will result in a HTTP 500 error page.

E.g.

public class MyValidator implements Validator {

    public void validate(FacesContext context, UIComponent component, Object value) {
        // validation logic here
    }

}

which you register as <validator> in faces-config.xml

<validator>
    <validator-id>myValidator</validator-id>
    <validator-class>com.example.MyValidator</validator-class>
</validator>

and use as follows in the inputs

<h:inputText ... validator="myValidator" />

or

<h:inputText ...>
    <f:validator validatorId="myValidator" />
</h:inputText>