protected Class determineDatabaseDialectClass(Database database) 
{
		switch (database) {
			case DB2: return DB2Dialect.class;
			case DERBY: return DerbyDialect.class;
			case H2: return H2Dialect.class;
			case HSQL: return HSQLDialect.class;
			case INFORMIX: return InformixDialect.class;
			case MYSQL: return MySQLDialect.class;
			case ORACLE: return Oracle9Dialect.class;  // deprecated since Hibernate 3.2.5 - to be updated in Spring 3.0
			case POSTGRESQL: return PostgreSQLDialect.class;
			case SQL_SERVER: return SQLServerDialect.class;
			case SYBASE: return SybaseDialect.class;
			default: return null;
		}
}

Determine the Hibernate database dialect class for the given target database.

 public Class getEntityManagerFactoryInterface() 
{
		return HibernateEntityManagerFactory.class;
}

 public Class getEntityManagerInterface() 
{
		return HibernateEntityManager.class;
}

 public JpaDialect getJpaDialect() 
{
		return this.jpaDialect;
}

 public Map getJpaPropertyMap() 
{
		Properties jpaProperties = new Properties();
		if (getDatabasePlatform() != null) {
			jpaProperties.setProperty(Environment.DIALECT, getDatabasePlatform());
		}
		else if (getDatabase() != null) {
			Class databaseDialectClass = determineDatabaseDialectClass(getDatabase());
			if (databaseDialectClass != null) {
				jpaProperties.setProperty(Environment.DIALECT, databaseDialectClass.getName());
			}
		}
		if (isGenerateDdl()) {
			jpaProperties.setProperty(Environment.HBM2DDL_AUTO, "update");
		}
		if (isShowSql()) {
			jpaProperties.setProperty(Environment.SHOW_SQL, "true");
		}
		return jpaProperties;
}

 public PersistenceProvider getPersistenceProvider() 
{
	   
		return this.persistenceProvider;
}

 public String getPersistenceProviderRootPackage() 
{
		return "org.hibernate";
}