/** Checks the text for errors and sets the error state accordingly. */
public void checkError() {
final boolean previousStatus = getMessage() == null || getMessage().isEmpty();
final ValidationResponse vr = validator.validate(getText());
setMessage(vr.getFailureReason());
firePropertyChange("validationResult", previousStatus, !vr.isFailure());
if (vr.isFailure()) {
setIcon(errorIcon);
} else {
setIcon(null);
}
}
