retrieve UIComponent value in custom validator with EL expressions

[Exxo exxo]

Hello,

I'm trying to retrieve the value of a HTMLOutPutLable component in my Custom validator. The value is an EL-Expression (using a Message.property-File). As long as I write a "normal" value for the value Attribute in the OutPutLable-Tag everything works fine, but with an EL-Expression the getValue()-Method always returns null.

Here are the important parts of my code:

jsp:

   
<h:outputLabel for="inputgroupname" [B]value="#{msg['useradmin.group.name']}[/B] id="labelgroupname" />
 
<h:inputText styleClass="formularfeld" maxlength="100" size="60" required="true" value="#{uaService.usergroupVO.groupname}" id="inputgroupname">
<f:validator validatorId="LcmLengthValidator"/></h:inputText></td>

Validator-Class:

    
public class LengthValidator implements Validator {

public static final String MAXIMUM_MESSAGE_ID = "validation.length_MAXIMUM";
 
FacesContext context;
 
public LengthValidator() {
 
context = FacesContext.getCurrentInstance();
}

public void validate(FacesContext ctx, UIComponent comp, Object obj)
throws ValidatorException {
int minvalue=6;
int maxvalue=2;
String enteredValue = (String) obj;
HtmlInputText input = (HtmlInputText) comp;
HtmlOutputLabel lablecomponent = (HtmlOutputLabel) getLabelForInput(comp);

if (enteredValue.length() > maxvalue){
lablecomponent.setStyleClass("errorlabel");
 throw new ValidatorException(MessageFactory.getMessage(MAXIMUM_MESSAGE_ID,lablecomponent.getValue(), maxvalue));
 
}
}
 
public UIComponent getLabelForInput(UIComponent component) {
 
String containerId = component.getContainerClientId(context);
String labelId = containerId.replace("input", "label");

HtmlOutputLabel lablecomponent = (HtmlOutputLabel) context.getViewRoot()
.findComponent(labelId);
return lablecomponent;
 
}

Any assistance would be appreciated. I heard of the ability to use the FacesContext.getCurrentInstance().getELContext() method, but i don't know how to use it correctly. Can anyone give an example code on this ?

Thanks, regards,

Exxo

[ August 19, 2008: Message edited by: Exxo exxo ]
[ August 19, 2008: Message edited by: Exxo exxo ]