*  @param expression A valid XPath string.
     *  @return An XPathEvaluationResult, which can be used to obtain a string, number, nodelist, etc, should never be null.
     *
     * @throws XPathExpressionException if an XPath expression error occurs.
     */
    public XPathEvaluationResult<?> eval(final Node contextNode, final String expression) throws XPathExpressionException {

        String toString1 = exception1.toString();
        assertNotNull(toString1);
        assertTrue(toString1.contains("CrawlerSystemException"));
        assertTrue(toString1.contains("Test message"));

        CrawlerSystemException exception2 = new CrawlerSystemException((String) null);
        String toString2 = exception2.toString();
        assertNotNull(toString2);

    /** Constant for UrlSet type. */
    public static final String URLSET = "UrlSet";

    /** Constant for Index type. */
    public static final String INDEX = "Index";

    /** The list of sitemaps in this set. */
    private final List<Sitemap> sitemapList = new ArrayList<>();

    /** The type of this sitemap set (URLSET or INDEX). */
    private String type = URLSET;

    /**

     * @return encoding
     */
    public String getEncoding() {
        return encoding;
    }

    /**
     * Set the encoding.
     * @param encoding the encoding to set
     */
    public void setEncoding(final String encoding) {
        this.encoding = encoding;
    }

    /**
     * Returns a string representation of this object.
     * @return A string representation.
     */
    @Override

     */
    public static final String DEBUG = "DEBUG";

    /**
     * Log level constant for info messages.
     */
    public static final String INFO = "INFO";

    /**
     * Log level constant for warning messages.
     */
    public static final String WARN = "WARN";

    /**
     * Log level constant for error messages.
     */
    public static final String ERROR = "ERROR";

    public void test_getData_implementation() {
        AccessResultData<String> accessResultData = new AccessResultData<String>() {
            private byte[] data = "test data".getBytes();
            private String encoding = "UTF-8";
            private String transformerName = "test";
            private String id;

            @Override
            public String getId() {
                return id;
            }

        assertArrayEquals(new String[] { "ニホンゴテスト" }, suggestItem.getReadings()[0]);
    }

    @Test
    public void testWithEmptyWord() {
        // Test with empty word string
        String word = "";
        float boost = 1.0f;
        List<String> readings = Arrays.asList("reading1");
        List<String> fields = Arrays.asList("field1");
        List<String> tags = Arrays.asList("tag1");

    private final String[] stopwords;

    private final boolean ignoreCase;

    public StopTokenPrefixFilterFactory(final IndexSettings indexSettings, final Environment environment, final String name,
            final Settings settings) {
        super(indexSettings, name, settings);

        final List<String> wordList = Analysis.parseWordList(environment, settings, "stopwords", s -> s);

        dataHelper.addExcludeUrlPattern(sessionId, url);
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.codelibs.fess.crawler.service.impl.UrlFilterService#addExcludeUrlFilter(java
     * .lang.String, java.util.List)
     */
    @Override
    public void addExcludeUrlFilter(final String sessionId, final List<String> urlList) {
        for (final String url : urlList) {

        private String ruleId;
        private ResponseProcessor responseProcessor;
        private Map<String, String> conditions = new HashMap<>();

        @Override
        public boolean match(ResponseData responseData) {
            if (responseData == null) {
                return false;
            }

            // Check URL condition
            String urlCondition = conditions.get("url");