assertNull(dataStoreParams.getAsString("nonExistentKey"));
        assertEquals("defaultValue", dataStoreParams.getAsString("nonExistentKey", "defaultValue"));

        dataStoreParams.put("nullKey", null);
        assertEquals("defaultValue", dataStoreParams.getAsString("nullKey", "defaultValue"));
    }

    // Test getAsString with default value and non-String value

        assertNotNull(capturedCallback.get());
        assertNotNull(capturedParams.get());
        assertEquals("value1", capturedParams.get().getAsString("key1"));
        assertEquals("value2", capturedParams.get().getAsString("key2"));
    }

    public void test_store_withNullConfig() {
        // Test store with null config
        final AtomicBoolean storeCalled = new AtomicBoolean(false);

         * </ul>
         */
        private void deleteOldDocs() {
            if (Constants.FALSE.equals(initParamMap.getAsString(DELETE_OLD_DOCS))) {
                return;
            }
            final String sessionId = initParamMap.getAsString(Constants.SESSION_ID);
            if (StringUtil.isBlank(sessionId)) {
                logger.warn("Invalid sessionId at {}", dataConfig);

        badWords = settings.badword().get(true);
        tagFieldNames = settings.getAsString(SuggestSettings.DefaultKeys.TAG_FIELD_NAME, StringUtil.EMPTY).split(",");
        roleFieldName = settings.getAsString(SuggestSettings.DefaultKeys.ROLE_FIELD_NAME, StringUtil.EMPTY);
        langFieldName = settings.getAsString(SuggestSettings.DefaultKeys.LANG_FIELD_NAME, StringUtil.EMPTY);

     * @param key The key of the setting.
     * @param defaultValue The default value if the setting is not found.
     * @return The setting value as a String.
     */
    public String getAsString(final String key, final String defaultValue) {
        final Object obj = get(key);

        final String value;
        if (obj == null) {
            value = defaultValue;
        } else {

            }
        }
        try {
            if (value.getClass() == String.class) {
                return converter.getAsObject((String) value);
            }
            return converter.getAsString(value);
        } catch (final Throwable cause) {
            throw new ConverterRuntimeException(destPropertyName, value, cause);
        }
    }

    /**

        this.readingConverter = readingConverter;
        this.contentsReadingConverter = contentsReadingConverter;
        this.normalizer = normalizer;
        this.analyzer = analyzer;
        index = settings.getAsString(SuggestSettings.DefaultKeys.INDEX, StringUtil.EMPTY);
        this.threadPool = threadPool;

        if (logger.isDebugEnabled()) {
            logger.debug("Create suggester instance for {}", index);
        }

     * @return the parameter value as a string, or the default value if not found
     */
    protected String getParamValue(final DataStoreParams paramMap, final String key, final String defaultValue) {
        return paramMap.getAsString(key, defaultValue);
    }

    /**
     * Adds a document to the search index by crawling the specified URL and processing the content.

         *
         * @param value The Date object to convert.
         * @return The ISO 8601 formatted date string, or null if value is not a Date.
         */
        @Override
        public String getAsString(final Object value) {
            if (value instanceof Date) {
                return DEFAULT_DATE_PRINTER.print(((Date) value).getTime());
            }
            return null;
        }

        /**

     * @throws IllegalAccessRuntimeException {@link IllegalAccessException} if an error occurs
     * @see #getString(Field, Object)
     */
    public static String getString(final Field field) throws IllegalAccessRuntimeException {
        assertArgumentNotNull("field", field);

        return getString(field, null);
    }

    /**
     * Returns the value of a {@link Field} as a {@link String}.
     *