making a component value required

[omidbiz]

Hi,

I created a component exactly as the same as CDK,

the source is available here, but the required attribute does not work although i see the setReuired method is generate i can not find any difference between my component and other rich faces component 

in what circumstances does required attribute work  ?

what i've done

public class UIDatePicker extends UIInput

.xml

&ui_component_attributes;

&html_events;

&ui_input_attributes;