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The following page has been changed by ScottWalter:
http://wiki.apache.org/jakarta-tapestry/CheckingForRequiredValidator

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  However, if you are using the new {{{Validation}}} model of Tapestry 4.0 you 
will want to do this
  {{{
  public void writeSuffix(IMarkupWriter writer, IRequestCycle cycle, 
IFormComponent component, IValidator validator) {
-                         boolean required = false;
+                         boolean requiredField = false;
                        if(component.getBinding("validators") instanceof 
ExpressionBinding) {
                                ExpressionBinding expressionBinding = 
(ExpressionBinding) component.getBinding("validators");
                                
org.apache.tapestry.form.validator.BaseValidator singleValidator = 
(org.apache.tapestry.form.validator.BaseValidator)expressionBinding.getObject();

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