Validation for ensuring that entered value contains alphabet only

[Adnan Gondal]

Hi all!
How can i make sure at conversion and validation phase during the JSF lifecycle that entered value in <h:inputText> contains alphabets only?
Thanks in advance.

[Guy deLyonesse]

Write a custom validator and use a regex to check the input.

Something like this:

<h:inputText id="textcontrol" validator="#{bean.myValidator}" value="#{backingBean.value}"/>

public void myValidator(FacesContext context, UIComponent component, Object value) {

  String textToCheck = (String) value;
  String regex = "/*your regex string*/";

  if(!textToCheck.matches(regex)){
   ((UIInput)toValidate).setValid(false);
   FacesMessage message = new FacesMessage("Value must be numeric.");
   context.addMessage(toValidate.getClientId(context), message);
  }
}

[Tim Holloway]

I may be wrong, buy I believe there already is a regex-based standard validator. So writing a custom validator shouldn't be necessary.

[Guy deLyonesse]

As far as I know in JSF 1.2 there's only the required, numeric range (doubles or ints) and string length standard validators.

I don't know about JSF 2.0.