validator not invoke

[lynn fann]

i have the following code:

<h:inputText value="#{addressBean.unitNo}" validator="#{myBean.validatefloorUnitNo}" id="unitNo" required="true"/>

in my managed bean:

 
    public void validatefloorUnitNo(FacesContext context, UIComponent component, Object value)throws ValidatorException{
        String floorUnitNo= (String) value;
        String strError="";
        Validation validation = new Validation();
        FacesMessage message = new FacesMessage(); 
        try {           
                strError = validate.IsValidAdd(floorUnitNo,"Invalid value.");  
                if(!strError.equals("NOERR")){
                    message.setSummary(strError);                
                    message.setDetail(strError);                    
                    context.addMessage("unitNo", message);
                }
             
        }
        catch (Exception e) {
            throw new ValidatorException(message);
        }        
    }