/** Disables the Validation by setting empty constraints. */
private void doRemoveValidation() {
setValidationOn(false);
artNr.setConstraint("");
aupMenge.setConstraint("");
aupEinzelwert.setConstraint("");
aupGesamtwert.setConstraint("");
}
/** Sets the Validation by setting the accordingly constraints to the fields. */
private void doSetValidation() {
setValidationOn(true);
artNr.setConstraint(new SimpleConstraint("NO EMPTY"));
aupMenge.setConstraint("NO EMPTY, NO ZERO");
aupEinzelwert.setConstraint("NO EMPTY, NO ZERO");
aupGesamtwert.setConstraint("NO EMPTY, NO ZERO");
}