*/
    public OpenSearchUrlFilter() {
        // NOP
    }

    /**
     * Field name for session ID.
     */
    public static final String SESSION_ID = "sessionId";

    /**
     * Field name for filter type.
     */
    public static final String FILTER_TYPE = "filterType";

    /**
     * Field name for URL.
     */
    public static final String URL = "url";

    /**

        request.addRole(role);
        return this;
    }

    /**
     * Adds a field to filter by.
     * @param field The field name.
     * @return This builder instance.
     */
    public PopularWordsRequestBuilder addField(final String field) {
        request.addField(field);
        return this;
    }

    /**
     * Adds a language to filter by.
     * @param lang The language.

                + "<doc>\n"//
                + "<field name=\"title\"><list><item>タイトル</item></list></field>\n"//
                + "<field name=\"body\"><list><item>第一章 第一節 ほげほげふがふが LINK 第2章 第2節</item></list></field>\n"//
                + "<field name=\"pcount\">2.0</field>\n"//
                + "<field name=\"true\">true</field>\n"//
                + "<field name=\"false\">false</field>\n"//
                + "</doc>";

        for (final ReadingConverter converter : converters) {
            converter.init();
        }
    }

    @Override
    public List<String> convert(final String text, final String field, final String... lang) throws IOException {
        final Queue<String> queue = new LinkedList<>();
        queue.add(text);
        final List<String> convertedTexts = new ArrayList<>(getMaxReadingNum());

        request.addRole(role);
        return this;
    }

    /**
     * Adds a field to filter by.
     * @param field The field name.
     * @return This builder instance.
     */
    public SuggestRequestBuilder addField(final String field) {
        request.addField(field);
        return this;
    }

    /**
     * Adds a kind to filter by.
     * @param kind The kind.

        assertEquals("test", testRule.getRuleId());
    }

    /**
     * Test protected field access
     */
    public void test_protectedFieldAccess() {
        // Test direct field access (protected fields)
        TestAbstractRule rule = new TestAbstractRule();

        // Direct field assignment
        rule.ruleId = "directFieldAccess";

                + "<field name=\"email\"><list><item></item><item>******@****.***</item></list></field>\n"//
                + "<field name=\"url\">http://www.taro.com/</field>\n"//
                + "<field name=\"tel\">090-xxxx-xxxx</field>\n"//
                + "</doc>";

        final ResponseData responseData = new ResponseData();
        responseData.setResponseBody(ResourceUtil.getResourceAsFile("extractor/test.xml"), false);

      }
    }
  ],
  "properties": {
    "@timestamp": {
      "type": "date",
      "format": "epoch_millis"
    },
    "docFreq": {
      "type": "long"
    },
    "fields": {
      "type": "keyword"
    },
    "kinds": {
      "type": "keyword"
    },
    "queryFreq": {
      "type": "long"
    },
    "roles": {
      "type": "keyword"
    },
    "languages": {

            builder.field(SESSION_ID, sessionId);
        }
        if (method != null) {
            builder.field(METHOD, method);
        }
        if (url != null) {
            builder.field(URL, url);
        }
        if (parentUrl != null) {
            builder.field(PARENT_URL, parentUrl);
        }
        if (depth != null) {
            builder.field(DEPTH, depth);
        }

    /**
     * Field name for ID.
     */
    protected static final String ID = "id";

    /**
     * Field name for session ID.
     */
    protected static final String SESSION_ID = "sessionId";

    /**
     * Field name for URL.
     */
    protected static final String URL = "url";

    /**
     * Field name for last modified timestamp.
     */