private List getAllTables(Connection conn) throws SQLException {
   DatabaseMetaData dbMetaData = conn.getMetaData();
   ResultSet rs = dbMetaData.getTables(getCatalog(), getSchema(), null, null);
   List tables = new ArrayList();
   while (rs.next()) {
     tables.add(createTable(conn, rs));
   }
   return tables;
 }
  private Table _getTable(String catalog, String schema, String tableName) throws SQLException {
    if (tableName == null || tableName.trim().length() == 0)
      throw new IllegalArgumentException("tableName must be not empty");
    catalog = StringHelper.defaultIfEmpty(catalog, null);
    schema = StringHelper.defaultIfEmpty(schema, null);

    Connection conn = getConnection();
    DatabaseMetaData dbMetaData = conn.getMetaData();
    ResultSet rs = dbMetaData.getTables(catalog, schema, tableName, null);
    while (rs.next()) {
      Table table = createTable(conn, rs);
      return table;
    }
    return null;
  }