}
    }

    // Test property filter returning null simulation
    @Test
    public void test_get_filterReturnsNull() {
        // The filter.null property is configured to simulate null filter behavior
        try {
            fessConfig.get("filter.null");
            fail("Should throw exception when property is not found");

										</div>
										<div class="filter-dropdown-list">
											<c:forEach var="item" items="${labelTypeItems}">
											<label class="filter-check-item">
												<input type="checkbox" class="filter-check" data-filter-type="label" data-filter-value="${f:h(item.value)}" />
												<span class="filter-check-label">${f:h(item.label)}</span>
											</label>
											</c:forEach>

        assertEquals(1, paramMap.size());
        assertEquals("1", paramMap.get("a")[0]);

        paramMap = filter.parseQueryString("a=1&b=2", "UTF-8");
        assertEquals(2, paramMap.size());
        assertEquals("1", paramMap.get("a")[0]);
        assertEquals("2", paramMap.get("b")[0]);

        paramMap = filter.parseQueryString("a=111&b=222&c=333", "UTF-8");

          "tokenizer": "standard",
          "filter": [
            "truncate20_filter",
            "lowercase",
            "arabic_stop",
            "arabic_normalization",
            "arabic_keywords",
            "arabic_override",
            "arabic_stemmer"
          ]
        },
        "armenian_analyzer": {
          "tokenizer":  "standard",
          "filter": [
            "truncate20_filter",

        // TODO always returns empty list
        return split(getIndexAdminArrayFields(), ",").get(stream -> stream.filter(StringUtil::isNotBlank)
                .map(String::trim)
                .filter(s -> isNonEmptyValue(source.get(s)))
                .filter(s -> false) // TODO
                .collect(Collectors.toList()));
    }

    String getIndexAdminDateFields();

										</div>
										<div class="filter-dropdown-list">
											<c:forEach var="item" items="${labelTypeItems}">
											<label class="filter-check-item">
												<input type="checkbox" class="filter-check" data-filter-type="label" data-filter-value="${f:h(item.value)}" />
												<span class="filter-check-label">${f:h(item.label)}</span>
											</label>
											</c:forEach>

    private int currentPageNumber;

    /** Search/filter parameter for duplicate host configuration ID. */
    public String id;

    /** Search/filter parameter for regular hostname pattern. */
    public String regularName;

    /** Search/filter parameter for duplicate hostname pattern. */
    public String duplicateHostName;

    /** Search/filter parameter for duplicate host sort order. */
    public String sortOrder;

                }
            }

            final DuplicateHostHelper duplicateHostHelper = ComponentUtil.getDuplicateHostHelper();

            // set urls
            split(urlsStr, "[\r\n]").of(stream -> stream.filter(StringUtil::isNotBlank).map(String::trim).distinct().forEach(urlValue -> {
                if (!urlValue.startsWith("#") && protocolHelper.isValidWebProtocol(urlValue)) {

    }

    /**
     * Gets the name of the filter index for the crawler.
     *
     * @return the filter index name
     */
    @Override
    public String getFilterIndex() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerIndex() + ".filter";
    }

    /**
     * Gets the number of shards for the queue index.
     *

        "tokenizer" : "fess_japanese_normal",
        "filter" : ["reading_form"]
      },
      "reading_term_analyzer" : {
        "type" : "custom",
        "tokenizer" : "fess_japanese_normal"
      },
      "normalize_analyzer" : {
        "type" : "custom",
        "tokenizer" : "keyword",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase"]
      },
      "contents_analyzer" : {