public Object[] getNaturalIdSnapshot(Serializable id, EntityPersister persister)
throws HibernateException {
if (!persister.hasNaturalIdentifier()) {
return null;
}
// if the natural-id is marked as non-mutable, it is not retrieved during a
// normal database-snapshot operation...
int[] props = persister.getNaturalIdentifierProperties();
boolean[] updateable = persister.getPropertyUpdateability();
boolean allNatualIdPropsAreUpdateable = true;
for (int i = 0; i < props.length; i++) {
if (!updateable[props[i]]) {
allNatualIdPropsAreUpdateable = false;
break;
}
}
if (allNatualIdPropsAreUpdateable) {
// do this when all the properties are updateable since there is
// a certain likelihood that the information will already be
// snapshot-cached.
Object[] entitySnapshot = getDatabaseSnapshot(id, persister);
if (entitySnapshot == NO_ROW) {
return null;
}
Object[] naturalIdSnapshot = new Object[props.length];
for (int i = 0; i < props.length; i++) {
naturalIdSnapshot[i] = entitySnapshot[props[i]];
}
return naturalIdSnapshot;
} else {
return persister.getNaturalIdentifierSnapshot(id, session);
}
}
private void checkNaturalId(
EntityPersister persister,
EntityEntry entry,
Object[] current,
Object[] loaded,
EntityMode entityMode,
SessionImplementor session) {
if (persister.hasNaturalIdentifier() && entry.getStatus() != Status.READ_ONLY) {
Object[] snapshot = null;
Type[] types = persister.getPropertyTypes();
int[] props = persister.getNaturalIdentifierProperties();
boolean[] updateable = persister.getPropertyUpdateability();
for (int i = 0; i < props.length; i++) {
int prop = props[i];
if (!updateable[prop]) {
Object loadedVal;
if (loaded == null) {
if (snapshot == null) {
snapshot =
session.getPersistenceContext().getNaturalIdSnapshot(entry.getId(), persister);
}
loadedVal = snapshot[i];
} else {
loadedVal = loaded[prop];
}
if (!types[prop].isEqual(current[prop], loadedVal, entityMode)) {
throw new HibernateException(
"immutable natural identifier of an instance of "
+ persister.getEntityName()
+ " was altered");
}
}
}
}
}
private Object[] determinePreviousNaturalIdValues(
EntityPersister persister,
Object[] previousState,
SessionImplementor session,
Serializable id) {
if (!persister.hasNaturalIdentifier()) {
return null;
}
if (previousState != null) {
return session
.getPersistenceContext()
.getNaturalIdHelper()
.extractNaturalIdValues(previousState, persister);
}
return session.getPersistenceContext().getNaturalIdSnapshot(id, persister);
}
