*
 */
public class DocumentHelper {
    private static final Logger logger = LogManager.getLogger(DocumentHelper.class);

    /** Prefix used for encoded similar document hashes */
    protected static final String SIMILAR_DOC_HASH_PREFIX = "$";

    /**
     * Default constructor for DocumentHelper.
     * Creates a new document helper instance.
     */

    }

    public void test_appendLineNumber() {
        DocumentHelper documentHelper = new DocumentHelper();

        assertEquals("", documentHelper.appendLineNumber("L", null));
        assertEquals("", documentHelper.appendLineNumber("L", ""));
        assertEquals("", documentHelper.appendLineNumber("L", " "));
        assertEquals("", documentHelper.appendLineNumber("L", "\n"));

        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final FileTypeHelper fileTypeHelper = ComponentUtil.getFileTypeHelper();
        final DocumentHelper documentHelper = ComponentUtil.getDocumentHelper();
        String url = responseData.getUrl();
        final String indexingTarget = crawlingConfig.getIndexingTarget(url);
        url = pathMappingHelper.replaceUrl(sessionId, url);

        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final FileTypeHelper fileTypeHelper = ComponentUtil.getFileTypeHelper();
        final DocumentHelper documentHelper = ComponentUtil.getDocumentHelper();
        final LabelTypeHelper labelTypeHelper = ComponentUtil.getLabelTypeHelper();
        String url = responseData.getUrl();

    private static final String PERMISSION_HELPER = "permissionHelper";

    private static final String QUERY_PARSER = "queryParser";

    private static final String DOCUMENT_HELPER = "documentHelper";

    private static final String ACTIVITY_HELPER = "activityHelper";

    private static final String LDAP_MANAGER = "ldapManager";

        SingletonLaContainerFactory.getContainer().register(FileTypeHelper.class, "fileTypeHelper");
        SingletonLaContainerFactory.getContainer().register(DocumentHelper.class, "documentHelper");
        SingletonLaContainerFactory.getContainer().register(LabelTypeHelper.class, "labelTypeHelper");

        WebConfig webConfig = new WebConfig();

                } else if (similarDocHash != null) {
                    final DocumentHelper documentHelper = ComponentUtil.getDocumentHelper();
                    context.addQuery(boolQuery -> {
                        boolQuery.filter(QueryBuilders.termQuery(fessConfig.getIndexFieldContentMinhashBits(),
                                documentHelper.decodeSimilarDocHash(similarDocHash)));
                    });
                }