access, db2, derby, empress, foxpro, h2, hsql, informix, ingres, jdatastore, mysql, oracle, pointbase, postgres,
sqlserver, sybase
};
protected DBType getDBType(EntityManager em) {
JDBCConfigurationImpl conf = (JDBCConfigurationImpl) getConfiguration(em);
String dictClassName = getConfiguration(em).getDBDictionaryInstance().getClass().getName();
String db = conf.dbdictionaryPlugin.alias(dictClassName);
return DBType.valueOf(db);
}