private Field findSqlMapExecutorDelegate(SqlMapClient sqlMapClient) { Class<?> searchType = sqlMapClient.getClass(); while (!Object.class.equals(searchType) && searchType != null) { Field[] fields = searchType.getDeclaredFields(); for (Field field : fields) { if (SqlMapExecutorDelegate.class.isAssignableFrom(field.getType())) return field; } searchType = searchType.getSuperclass(); } return null; }