public  void configure(Type type,
    Properties params,
    Dialect dialect) throws MappingException 
{
	          
		sequenceName = PropertiesHelper.getString(SEQUENCE, params, "hibernate_sequence");
		parameters = params.getProperty(PARAMETERS);
		String schemaName = params.getProperty(SCHEMA);
		String catalogName = params.getProperty(CATALOG);
		if (sequenceName.indexOf( '." ) <  0) {
			sequenceName = Table.qualify( catalogName, schemaName, sequenceName );
		}
		this.identifierType = type;
		sql = dialect.getSequenceNextValString(sequenceName);
}

 public Serializable generate(SessionImplementor session,
    Object obj) throws HibernateException 
{
		
		try {
			PreparedStatement st = session.getBatcher().prepareSelectStatement(sql);
			try {
				ResultSet rs = st.executeQuery();
				try {
					rs.next();
					Serializable result = IdentifierGeneratorFactory.get(
							rs, identifierType
						);
					if ( log.isDebugEnabled() ) {
						log.debug("Sequence identifier generated: " + result);
					}
					return result;
				}
				finally {
					rs.close();
				}
			}
			finally {
				session.getBatcher().closeStatement(st);
			}
		}
		catch (SQLException sqle) {
			throw JDBCExceptionHelper.convert(
					session.getFactory().getSQLExceptionConverter(),
					sqle,
					"could not get next sequence value",
					sql
				);
		}
}

 public Object generatorKey() 
{
		return sequenceName;
}

 public String getSequenceName() 
{
		return sequenceName;
}

 public String[] sqlCreateStrings(Dialect dialect) throws HibernateException 
{
		String[] ddl = dialect.getCreateSequenceStrings(sequenceName);
		if ( parameters != null ) {
			ddl[ddl.length - 1] += ' " + parameters;
		}
		return ddl;
}

 public String[] sqlDropStrings(Dialect dialect) throws HibernateException 
{
		return dialect.getDropSequenceStrings(sequenceName);
}