assertEquals("太郎", extractData.getValues("dc:creator")[0]);
        assertEquals("かいしゃ", extractData.getValues("extended-properties:Company")[0]);
        assertEquals("1", extractData.getValues("xmpTPg:NPages")[0]);
        assertEquals("2009-06-26T21:41:00Z", extractData.getValues("dcterms:created")[0]);
        assertEquals("2012-05-18T22:45:00Z", extractData.getValues("dcterms:modified")[0]);

        assertEquals(name, param.getName());
        assertNotNull(param.getValues());
        assertEquals(4, param.getValues().length);
        assertEquals("value1", param.getValues()[0]);
        assertNull(param.getValues()[1]);
        assertEquals("value3", param.getValues()[2]);
        assertNull(param.getValues()[3]);
    }

    public void test_constructor_withSpecialCharacters() {

        logger.info(content);
        assertTrue(content.contains("テスト"));
        assertEquals("Writer", extractData.getValues("Creator")[0]);
        assertEquals("OpenOffice.org 3.0", extractData.getValues("Producer")[0]);
        assertEquals("D:20090627222631+09'00'", extractData.getValues("CreationDate")[0]);
    }

    public void test_getText_pass() {

                                if (bitsField != null && !bitsField.getValues().isEmpty()) {
                                    docMap.put(fessConfig.getQueryCollapseInnerHitsName() + "_hash", bitsField.getValues().get(0));
                                }

            assertTrue(data.getValues("Subject")[0].contains("気象情報"));
        }
    }

    public void test_getReceivedDate() throws IOException {
        try (final InputStream in = ResourceUtil.getResourceAsStream("extractor/eml/sample1.eml")) {
            ExtractData data = emlExtractor.getText(in, null);
            final String[] receivedDate = data.getValues("Received-Date");

        final String content = data.getContent();
        CloseableUtil.closeQuietly(in);
        logger.info(content);
        assertTrue(content.contains("テスト"));
        assertEquals("タイトル", data.getValues("title")[0]);
    }

    public void test_getHtml_sjis() {
        final InputStream in = ResourceUtil.getResourceAsStream("extractor/test_sjis.html");
        final ExtractData data = htmlExtractor.getText(in, null);

        assertEquals("ja", result[1].getValues()[1]);
    }

    // Test addRewriter method
    public void test_addRewriter() {
        SearchHelper.SearchRequestParamsRewriter rewriter = p -> p;

        searchHelper.addRewriter(rewriter);

        assertNotNull(searchHelper.searchRequestParamsRewriters);
        assertTrue(searchHelper.searchRequestParamsRewriters.length > 0);
    }

                                    || Constants.MAPPING_TYPE_PDF_DATE.equalsIgnoreCase(mapping.getValue2())) {
                                final String dateFormat;
                                if (StringUtil.isNotBlank(mapping.getValue3())) {
                                    dateFormat = mapping.getValue3();
                                } else if (Constants.MAPPING_TYPE_PDF_DATE.equalsIgnoreCase(mapping.getValue2())) {

        return name;
    }

    /**
     * Returns the array of values associated with this request parameter.
     *
     * @return the parameter values array, may be null or empty
     */
    public String[] getValues() {
        return values;
    }

    /**
     * Returns a string representation of this RequestParameter.
     * The format includes the parameter name and its values in array format.
     *

    /**
     * Gets the values associated with a given key from the metadata.
     *
     * @param key the metadata key
     * @return the values associated with the key, or null if not found
     */
    public String[] getValues(final String key) {
        return metadata.get(key);
    }

    /**
     * Gets the set of all metadata keys.
     *
     * @return the set of metadata keys
     */