@Override
public int doStartTag() throws JspException {
UIComponentClassicTagBase componentTag =
UIComponentELTag.getParentUIComponentClassicTagBase(pageContext);
if (componentTag == null) {
throw new JspException("no parent UIComponentTag found");
}
if (!componentTag.getCreated()) {
return Tag.SKIP_BODY;
}
Validator validator = createValidator();
UIComponent component = componentTag.getComponentInstance();
if (component == null) {
throw new JspException("parent UIComponentTag has no UIComponent");
}
if (!(component instanceof EditableValueHolder)) {
throw new JspException("UIComponent is no EditableValueHolder");
}
((EditableValueHolder) component).addValidator(validator);
return Tag.SKIP_BODY;
}
