Question

I have defined by custom Validator (implements javax.faces.validator.Validator interface and defined in faces-config). I need my custom component to call this validator within my component code ( Renderer class).
I want to make my xhtml as clean as possible and don’t want to invoke the validator separately in my xhtml by embedding

<f:validator validatorId='xx' /> 

within my component tag.
Just like how I can implement

getConvertedValue(FacesContext context, UIComponent component, Object submittedValue) 

within my Renderer to handle conversion, can I do something similar to handle validation within Renderer?

Thanks

Answer 1

This is to be done at the UI component level, not at the renderer level. Your custom input component must surely already extend UIInput, otherwise you’ve many other (future) problems and/or you’ll waste time in writing repeated code. If your custom input component extends UIInput, then you can just add the Validator by the inherited UIInput#addValidator() method in for example the component’s constructor.

public MyCustomInputComponent() {
    addValidator(new MyCustomValidator());
}

The already-implemented UIInput#validate() method will do all the conversion, validation and message handling automagically.