When validation fails I need to display a validation error message in the
ModalWindow. This code is from my validator.
public class MyValidator
extends AbstractFormValidator
implements Serializable {
private final TextField<Integer> textField;
public MyValidator( TextField<Integer> textField ) {
this.textField = textField;
}
@Override
public FormComponent<?>[] getDependentFormComponents() {
return new FormComponent[] { textField };
}
@Override
public void validate( Form<?> form ) {
Integer value = textField.getConvertedInput();
if ( !isValidNumber( value.intValue() ) ) {
error( textField, ""invalid" );
}
}
And in my panel I add it to my text field:
add( new MyFormValidator( textField ) );
However when I run my code and submit the request, I get an NPE when
value.initValue() is called because getConvertedInput() returns null. There
is no value in the textField at this moment. That's why I thought that I
need to possibly attach a behavior to the text field in order to get the
value.
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