public SubscriptionStateEntity getByName(String name) {
return (SubscriptionStateEntity)
sessionFactory
.getCurrentSession()
.createCriteria(SubscriptionStateEntity.class)
.add(Restrictions.naturalId().set("name", name))
.uniqueResult();
}
public static MessageBundleEntry loadByBundleAndCode(String bundle, String code) {
return (MessageBundleEntry)
getSession()
.createCriteria(MessageBundleEntry.class)
.setCacheable(true)
.setCacheRegion("messages")
.add(Restrictions.naturalId().set("bundle", bundle).set("code", code))
.uniqueResult();
}
@SuppressWarnings("unchecked")
public static void removeEmptyEntries(String bundle) {
List<MessageBundleEntry> entries =
getSession()
.createCriteria(MessageBundleEntry.class)
.setCacheable(true)
.setCacheRegion("messages")
.add(Restrictions.sizeLe("messages", 1))
.add(Restrictions.naturalId().set("bundle", bundle))
.list();
for (MessageBundleEntry entry : entries) {
entry.delete();
}
}
private static <T> T maybeNaturalId(final T example)
throws HibernateException, NoSuchElementException {
final String natId = ((HasNaturalId) example).getNaturalId();
@SuppressWarnings("unchecked")
final T ret =
(T)
Entities.getTransaction(example)
.getTxState()
.getSession()
.createCriteria(example.getClass())
.add(Restrictions.naturalId().set("naturalId", natId))
.setCacheable(true)
.setMaxResults(1)
.setFetchSize(1)
.setFirstResult(0)
.uniqueResult();
if (ret == null) {
throw new NoSuchElementException("@NaturalId: " + natId);
}
return ret;
}
/**
* Returns the unique result from the database that exactly matches <code>example</code>. The
* differences between this method and {@link #getUnique(Object)} are:
*
* <ol>
* <li>{@link #getUnique(Object)} uses <i><code>enableLike</code></i> match and this method does
* not. <i><code>enableLike</code></i> criteria trips hibernate when special characters are
* involved. So it has been replaced by exact "=" (equals to)
* <li>Unique result logic is correctly implemented in this method. If the query returns more
* than one result, this method correctly throws an exception wrapping <code>
* NonUniqueResultException</code>. {@link #getUnique(Object)} does not throw an exception
* in this case and returns a result as long as it finds one or more matching results
* (because of the following properties set on the query: <code>setMaxResults(1)</code>,
* <code>setFetchSize(1)</code> and <code>setFirstResult(0)</code>)
* </ol>
*
* @param example
* @return
* @throws EucalyptusCloudException
*/
@SuppressWarnings("unchecked")
public <T> T getUniqueEscape(final T example) throws EucalyptusCloudException {
try {
Object id = null;
try {
id =
this.getEntityManager()
.getEntityManagerFactory()
.getPersistenceUnitUtil()
.getIdentifier(example);
} catch (final Exception ex) {
}
if (id != null) {
final T res = (T) this.getEntityManager().find(example.getClass(), id);
if (res == null) {
throw new NoSuchElementException("@Id: " + id);
} else {
return res;
}
} else if ((example instanceof HasNaturalId)
&& (((HasNaturalId) example).getNaturalId() != null)) {
final String natId = ((HasNaturalId) example).getNaturalId();
final T ret =
(T)
this.createCriteria(example.getClass())
.setLockMode(LockMode.NONE)
.setCacheable(true)
.add(Restrictions.naturalId().set("naturalId", natId))
.uniqueResult();
if (ret == null) {
throw new NoSuchElementException("@NaturalId: " + natId);
}
return ret;
} else {
final T ret =
(T)
this.createCriteria(example.getClass())
.setLockMode(LockMode.NONE)
.setCacheable(true)
.add(Example.create(example))
.uniqueResult();
if (ret == null) {
throw new NoSuchElementException("example: " + LogUtil.dumpObject(example));
}
return ret;
}
} catch (final NonUniqueResultException ex) {
throw new EucalyptusCloudException(
"Get unique failed for "
+ example.getClass().getSimpleName()
+ " because "
+ ex.getMessage(),
ex);
} catch (final NoSuchElementException ex) {
throw new EucalyptusCloudException(
"Get unique failed for "
+ example.getClass().getSimpleName()
+ " using "
+ ex.getMessage(),
ex);
} catch (final Exception ex) {
final Exception newEx = PersistenceExceptions.throwFiltered(ex);
throw new EucalyptusCloudException(
"Get unique failed for "
+ example.getClass().getSimpleName()
+ " because "
+ newEx.getMessage(),
newEx);
}
}
