this.metaData = metaData;
    }

    @Override
    public String getEncoding() {
        return encoding;
    }

    @Override
    public void setEncoding(final String encoding) {
        this.encoding = encoding;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.entity.UrlQueue#getParentUrl()
     */
    @Override

    public void testEncodingMethod() {
        CurlRequest request = new CurlRequest(Method.GET, "https://example.com");
        String encoding = "ISO-8859-1";

        CurlRequest result = request.encoding(encoding);

        assertSame(request, result); // Fluent API
        assertEquals(encoding, request.encoding());
    }

    @Test
    public void testEncodingAfterParamThrowsException() {

    }

    /** An empty string constant. */
    public static final String EMPTY_STRING = "";

    /** The system property name for user dictionary encoding. */
    public static final String USER_DICT_ENCODING = "fess.user.dict.encoding";

    /** The system property name for user dictionary path. */
    public static final String USER_DICT_PATH = "fess.user.dict.path";

    /** The text separator. */

        return charset;
    }

    /**
     * Gets the character encoding used for files.
     *
     * @return the character encoding
     */
    public String getCharset() {
        return charset;
    }

    /**
     * Sets the character encoding used for files.
     *
     * @param charset the character encoding to set
     */
    public void setCharset(final String charset) {

        assertEquals(metaData, queue.getMetaData());

        queue.setMetaData(null);
        assertNull(queue.getMetaData());
    }

    public void test_encodingGetterSetter() {
        // Test encoding getter/setter
        UrlQueueImpl<Long> queue = new UrlQueueImpl<>();

        queue.setEncoding("UTF-8");
        assertEquals("UTF-8", queue.getEncoding());

        queue.setEncoding("ISO-8859-1");

    /**
     * Field name for data.
     */
    public static final String DATA = "data";

    /**
     * Field name for encoding.
     */
    public static final String ENCODING = "encoding";

    /**
     * Creates a new instance of OpenSearchAccessResultData.
     */
    public OpenSearchAccessResultData() {
    }

    /**

				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.14.0</version>
				<configuration>
					<encoding>UTF-8</encoding>
					<release>17</release>
				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-javadoc-plugin</artifactId>
				<version>3.11.2</version>
				<configuration>
					<encoding>UTF-8</encoding>
					<docencoding>UTF-8</docencoding>
					<charset>UTF-8</charset>
				</configuration>
			</plugin>

     * @param url the parent URL
     * @param depth the depth of the child URLs
     * @param encoding the encoding of the child URLs
     */
    protected void storeChildUrls(final CrawlerContext crawlerContext, final Set<RequestData> childUrlList, final String url,
            final int depth, final String encoding) {
        // add url and filter
        final Set<String> urlSet = new HashSet<>();

**Purpose**: Test TextExtractor improvements and encoding handling.

**Key Test Areas**:
- Improved error messages with encoding
- Various encoding support
- Edge cases (empty, large, Unicode)
- Special characters handling

**Test Count**: 12 tests

**Key Scenarios**:
- ✅ Default UTF-8 encoding extraction
- ✅ Custom encoding support
- ✅ Error messages include encoding information
- ✅ Large content handling

     */
    void setMetaData(String metaData);

    /**
     * Retrieves the encoding of the URL queue.
     *
     * @return the encoding as a String.
     */
    String getEncoding();

    /**
     * Sets the encoding for the URL queue.
     *
     * @param encoding the encoding to be set
     */
    void setEncoding(String encoding);

    /**
     * Retrieves the parent URL of the current URL in the queue.