}
private static class HtmlGradeTextInput extends HtmlTextInput {
public HtmlGradeTextInput(final boolean required) {
HtmlChainValidator htmlChainValidator = new HtmlChainValidator(this);
super.setChainValidator(htmlChainValidator);
new HtmlGradeTextInputValidator(htmlChainValidator);
if (required) {
htmlChainValidator.addValidator(new RequiredValidator(htmlChainValidator));
}
}