ResponseData responseData = new ResponseData();
        responseData.setUrl("http://example.com");

        ResultData result1 = transformer1.transform(responseData);
        ResultData result2 = transformer2.transform(responseData);
        ResultData result3 = transformer3.transform(responseData);

        assertEquals("transformer1", result1.getTransformerName());
        assertEquals("transformer2", result2.getTransformerName());

        ResponseData responseData = new ResponseData();

        // Transform with different names
        tracker.setName("name1");
        tracker.transform(responseData);

        tracker.setName("name2");
        tracker.transform(responseData);

        tracker.setName("name3");
        tracker.transform(responseData);

        List<String> history = tracker.getNameHistory();

        responseData.setMimeType("text/html");
        final ResultData resultData = textTransformer.transform(responseData);
        assertEquals("xyz", new String(resultData.getData(), resultData.getEncoding()));
    }

    public void test_transform_null() {
        try {
            textTransformer.transform(null);
            fail();
        } catch (final CrawlerSystemException e) {
            // NOP
        }

     */
    public BinaryTransformer() {
        // NOP
    }

    /**
     * Transforms the given ResponseData into a ResultData containing binary content.
     * @param responseData The response data to be transformed.
     * @return The transformed ResultData.
     */
    @Override
    public ResultData transform(final ResponseData responseData) {
        if (responseData == null || !responseData.hasResponseBody()) {

        super();
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.codelibs.fess.crawler.transformer.impl.AbstractTransformer#transform(org.fess.crawler.entity.ResponseData)
     */
    @Override
    public ResultData transform(final ResponseData responseData) {
        if (responseData == null || !responseData.hasResponseBody()) {
            throw new CrawlingAccessException("No response body.");

        }
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.transformer.impl.AbstractTransformer#transform(org.codelibs.fess.crawler.entity.ResponseData)
     */
    @Override
    public ResultData transform(final ResponseData responseData) {
        if (responseData == null || !responseData.hasResponseBody()) {
            throw new CrawlingAccessException("No response body.");

    /** Container for managing crawler components */
    @Resource
    protected CrawlerContainer crawlerContainer;

    /** Transformer used to transform response data */
    protected Transformer transformer;

    /** HTTP status codes considered successful */
    protected int[] successfulHttpCodes;

    /** HTTP status codes considered not modified */

 *   <li><b>invalidUrlPattern:</b> A regular expression pattern used to identify
 *       invalid URLs.</li>
 * </ul>
 *
 * <p>
 * <b>Usage:</b>
 * </p>
 * <p>
 * The {@code transform} method is the main entry point for transforming an HTML
 * response. It takes a {@link ResponseData} object as input and returns a
 * {@link ResultData} object containing the extracted data and child URLs.
 * </p>
 */

import org.codelibs.nekohtml.parsers.DOMParser;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;

/**
 * {@link XpathTransformer} is a class that transforms HTML content into XML format based on XPath expressions.
 * It extracts data from an HTML document by applying XPath rules defined in {@link #fieldRuleMap}.