assertEquals("hello", DocumentUtil.encodeUrl("hello"));
        assertEquals("hello+world", DocumentUtil.encodeUrl("hello world"));
        assertEquals("test+value", DocumentUtil.encodeUrl("test+value"));
    }

    @Test
    public void test_encodeUrl_special_characters() {
        assertEquals("test&value", DocumentUtil.encodeUrl("test&value"));
        assertEquals("test=value", DocumentUtil.encodeUrl("test=value"));

            }
            final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldThumbnail(), String.class);
            if (StringUtil.isBlank(url)) {
                throw new ThumbnailGenerationException("Invalid thumbnail: " + url);
            }
            final String configId = DocumentUtil.getValue(doc, fessConfig.getIndexFieldConfigId(), String.class);

import org.codelibs.fess.opensearch.client.SearchEngineClient.SearchConditionBuilder;
import org.codelibs.fess.rank.fusion.SearchResult.SearchResultBuilder;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocumentUtil;
import org.codelibs.fess.util.FacetResponse;
import org.dbflute.optional.OptionalEntity;
import org.dbflute.optional.OptionalThing;
import org.lastaflute.web.util.LaRequestUtil;

import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig;
import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig.ConfigName;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocumentUtil;

/**
 * FessCrawlerThread is a specialized crawler thread implementation for the Fess search engine.
 * This class extends the base CrawlerThread and provides Fess-specific functionality for

import org.codelibs.fess.opensearch.config.exbhv.KeyMatchBhv;
import org.codelibs.fess.opensearch.config.exentity.KeyMatch;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocumentUtil;
import org.opensearch.index.query.BoolQueryBuilder;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocList;
import org.codelibs.fess.util.DocumentUtil;
import org.codelibs.fess.util.MemoryUtil;

import jakarta.annotation.PostConstruct;

/**
 * Implementation of IndexUpdateCallback for handling document indexing operations.

import org.codelibs.core.misc.Tuple3;
import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocumentUtil;

/**
 * HTML tag-based thumbnail generator that creates thumbnails from image content
 * referenced in HTML documents. This generator extracts images from HTML content

                                .stream()
                                .map(doc -> {
                                    final String id = DocumentUtil.getValue(doc, fessConfig.getIndexFieldId(), String.class);
                                    final String docId = DocumentUtil.getValue(doc, fessConfig.getIndexFieldDocId(), String.class);
                                    if (id != null && docId != null && clickCountMap.containsKey(docId)) {

                        // Merge searcher names
                        final String[] searcherNames = DocumentUtil.getValue(doc, Constants.SEARCHER, String[].class);
                        if (searcherNames != null) {
                            final String[] existingSearchers = DocumentUtil.getValue(existingDoc, Constants.SEARCHER, String[].class);
                            if (existingSearchers != null) {

import org.codelibs.fess.opensearch.config.exbhv.ThumbnailQueueBhv;
import org.codelibs.fess.opensearch.config.exentity.ThumbnailQueue;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocumentUtil;
import org.codelibs.fess.util.ResourceUtil;
import org.opensearch.index.query.QueryBuilders;

import com.google.common.collect.Lists;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;