final File baseDir = new File(getServletContext().getRealPath("/"));
        final File targetFile = new File(getServletContext().getRealPath(fileName));
        final List<File> fileList = getAccessibleFileList(baseDir);
        for (final File file : fileList) {
            if (targetFile.equals(file)) {
                return OptionalEntity.of(targetFile);
            }
        }
        return OptionalEntity.empty();
    }