*
 */
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.
     */

        assertEquals("L1:aaa\nL2:bbb", documentHelper.appendLineNumber("L", "aaa\nbbb"));
        assertEquals("L1:aaa\nL2:bbb\nL3:ccc", documentHelper.appendLineNumber("L", "aaa\nbbb\nccc"));
    }

    @Test
    public void test_init() {
        DocumentHelper documentHelper = new DocumentHelper();

        try {
            documentHelper.init();

		 -->
	</component>
	<component name="crawlingConfigHelper" class="org.codelibs.fess.helper.CrawlingConfigHelper">
	</component>
	<component name="documentHelper" class="org.codelibs.fess.helper.DocumentHelper">
	</component>
	<component name="fileTypeHelper" class="org.codelibs.fess.helper.FileTypeHelper">
	</component>
	<component name="indexingHelper" class="org.codelibs.fess.helper.IndexingHelper">

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

import org.codelibs.fess.helper.CoordinatorHelper;
import org.codelibs.fess.helper.CrawlingConfigHelper;
import org.codelibs.fess.helper.CrawlingInfoHelper;
import org.codelibs.fess.helper.CurlHelper;
import org.codelibs.fess.helper.DocumentHelper;
import org.codelibs.fess.helper.DuplicateHostHelper;
import org.codelibs.fess.helper.FileTypeHelper;
import org.codelibs.fess.helper.IndexingHelper;
import org.codelibs.fess.helper.IntervalControlHelper;

        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)));
                    });
                }