*/
public static DataAccessException convertJpaAccessExceptionIfPossible(RuntimeException ex) {
// Following the JPA specification, a persistence provider can also
// throw these two exceptions, besides PersistenceException.
if (ex instanceof IllegalStateException) {
return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
}
if (ex instanceof IllegalArgumentException) {
return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
}
// Check for well-known PersistenceException subclasses.
if (ex instanceof EntityNotFoundException) {
return new JpaObjectRetrievalFailureException((EntityNotFoundException) ex);
}
if (ex instanceof NoResultException) {
return new EmptyResultDataAccessException(ex.getMessage(), 1);
}
if (ex instanceof NonUniqueResultException) {
return new IncorrectResultSizeDataAccessException(ex.getMessage(), 1);
}
if (ex instanceof OptimisticLockException) {
return new JpaOptimisticLockingFailureException((OptimisticLockException) ex);
}
if (ex instanceof EntityExistsException) {
return new DataIntegrityViolationException(ex.getMessage(), ex);
}
if (ex instanceof TransactionRequiredException) {
return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
}
// If we have another kind of PersistenceException, throw it.
if (ex instanceof PersistenceException) {
return new JpaSystemException((PersistenceException) ex);