new String[] { fessConfig.getIndexFieldThumbnail(), fessConfig.getIndexFieldConfigId() });
            if (doc == null) {
                throw new ThumbnailGenerationException("Document is not found: " + id);
            }
            final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldThumbnail(), String.class);
            if (StringUtil.isBlank(url)) {

            public String getIndexFieldDigest() {
                return baseConfig.getIndexFieldDigest();
            }

            @Override
            public String getIndexFieldThumbnail() {
                return baseConfig.getIndexFieldThumbnail();
            }

            @Override
            public String getIndexFieldClickCount() {
                return baseConfig.getIndexFieldClickCount();
            }

    public void test_indexFieldFilename() {
        assertEquals("filename", fessConfig.getIndexFieldFilename());
    }

    public void test_indexFieldThumbnail() {
        assertEquals("thumbnail", fessConfig.getIndexFieldThumbnail());
    }

    public void test_indexFieldMimetype() {
        assertEquals("mimetype", fessConfig.getIndexFieldMimetype());
    }

    // Test admin field configurations

            }

            @Override
            public String getIndexFieldDigest() {
                return "digest";
            }

            @Override
            public String getIndexFieldThumbnail() {
                return "thumbnail";
            }

            @Override
            public String getIndexFieldClickCount() {
                return "click_count";
            }

            }

            @Override
            public String getIndexFieldUrl() {
                return "url";
            }

            @Override
            public String getIndexFieldThumbnail() {
                return "thumbnail";
            }

            @Override
            public String getIndexFieldClickCount() {
                return "click_count";
            }

            }

            @Override
            public String getIndexFieldUrl() {
                return "url";
            }

            @Override
            public String getIndexFieldThumbnail() {
                return "thumbnail";
            }

            @Override
            public String getIndexFieldClickCount() {
                return "click_count";
            }

            }

            @Override
            public String getIndexFieldUrl() {
                return "url";
            }

            @Override
            public String getIndexFieldThumbnail() {
                return "thumbnail";
            }

            @Override
            public String getIndexFieldClickCount() {
                return "click_count";
            }

            putResultDataBody(dataMap, fessConfig.getIndexFieldUrl(), url); // set again
        }
        // thumbnail
        putResultDataBody(dataMap, fessConfig.getIndexFieldThumbnail(), responseData.getUrl());

        // from config
        final String scriptType = crawlingConfig.getScriptType();

        try {
            if (fessConfig.isThumbnailCrawlerEnabled()) {
                final ThumbnailManager thumbnailManager = ComponentUtil.getThumbnailManager();
                final String thumbnailField = fessConfig.getIndexFieldThumbnail();
                docList.stream().forEach(doc -> {
                    if (!thumbnailManager.offer(doc)) {
                        if (logger.isDebugEnabled()) {

        }
        // thumbnail
        final String thumbnailUrl = getThumbnailUrl(responseData, document);
        if (StringUtil.isNotBlank(thumbnailUrl)) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldThumbnail(), thumbnailUrl);
        }

        // from config
        final String scriptType = crawlingConfig.getScriptType();