@Override
    public boolean generate(final String thumbnailId, final File outputFile) {
        return false;
    }

    @Override
    public void destroy() {
        // nothing
    }

    public void crawl(final String sessionId) {
        final List<DataConfig> configList = ComponentUtil.getCrawlingConfigHelper().getAllDataConfigList();

        if (configList.isEmpty()) {
            // nothing
            if (logger.isInfoEnabled()) {
                logger.info("No crawling target data.");
            }
            return;
        }

        doCrawl(sessionId, configList);
    }

import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Stream;

public class StreamUtil {
    private StreamUtil() {
        // nothing
    }

    @SafeVarargs
    public static <T> StreamOf<T> stream(final T... values) {
        return new StreamOf<>(() -> values != null ? Arrays.stream(values) : Collections.<T> emptyList().stream());
    }

        return n;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.CloseableIterator#close()
     */
    @Override
    public void close () {
        // nothing to clean up
        this.next = null;
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException("remove");
    }

            paramMap.put(entry.getKey(), list.toArray(new String[list.size()]));
        }
        return paramMap;
    }

    @Override
    public void destroy() {
        // nothing
    }

    protected static final String CONFIG_PREFIX = "config.";

    protected static final String FIELD_PREFIX = "field.config.";

    protected ParameterUtil() {
        // nothing
    }

    public static Map<String, String> parse(final String value) {
        final Map<String, String> paramMap = new LinkedHashMap<>();
        if (value != null) {
            int unknownKey = 0;

    protected Map<String, Object> getUpdateMap() {
        final Map<String, Object> updateMap = new HashMap<>();
        return updateMap;
    }

    @AfterEach
    protected void tearDown() {
        // do nothing
    }

    protected String getInstalledEndpointSuffix() {
        return INSTALLED_ENDPOINT_SUFFIX;
    }

    protected String getAvailableEndpointSuffix() {
        return AVAILABLE_ENDPOINT_SUFFIX;
    }

        protected int numOfThreads = 1;

        @Option(name = "-c", aliases = "--cleanup", usage = "Clean-Up mode")
        protected boolean cleanup;

        protected Options() {
            // nothing
        }

        @Override
        public String toString() {
            return "Options [sessionId=" + sessionId + ", name=" + name + ", propertiesPath=" + propertiesPath + ", numOfThreads="

        try {
            assertQueryBuilder("", "sort:xxx");
            fail();
        } catch (InvalidQueryException e) {
            // nothing
        }
    }

    private void assertQueryBuilder(final String expect, final String text) throws Exception {
        QueryContext queryContext = assertQueryBuilder(null, null, text);

                        } catch (final NumberFormatException e) {
                            consumer.accept(attrName);
                        }
                    }));
        } else {
            // do nothing
        }
    }

    public void delete(final User user) {
        if (!fessConfig.isLdapAdminEnabled(user.getName())) {
            return;
        }