buf.append('_').append(Integer.toString(hash)).append('/');
        }
        buf.append(docid).append('.').append(imageExtention);
        return buf.toString();
    }

    public File getThumbnailFile(final Map<String, Object> docMap) {
        final String thumbnailPath = getImageFilename(docMap);
        if (StringUtil.isNotBlank(thumbnailPath)) {
            final File file = new File(baseDir, thumbnailPath);