This is a generic sequence ID generator that is based on a database
table called 'SEQUENCE', which contains two columns (NAME, NEXTID).
This approach should work with any database.
Sequence sequence = new Sequence(name, -1);
sequence = (Sequence) getSqlMapTemplate().executeQueryForObject("getSequence", sequence);
if (sequence == null) {
throw new DataRetrievalFailureException("Error: A null sequence was returned from the database (could not get next " +
name + " sequence).");
}
Object parameterObject = new Sequence(name, sequence.getNextId() + 1);
getSqlMapTemplate().executeUpdate("updateSequence", parameterObject);
return sequence.getNextId();
