* </p>
 *
 * <p>
 * The class also provides methods to set and get the charset name used for encoding and decoding the text content.
 * </p>
 *
 * <p>
 * It depends on CrawlerContainer to get ExtractorFactory.
 * </p>
 */
public class TextTransformer extends AbstractTransformer {
    private static final Logger logger = LogManager.getLogger(TextTransformer.class);

    /**

        urlFilter.addInclude("https://first.com/.*");

        // Second session
        urlFilter.init("session-002");
        urlFilter.addInclude("https://second.com/.*");

        // Behavior depends on implementation
        // At minimum, should not throw exceptions
        assertNotNull(urlFilter);
    }

    /**
     * Test special characters in URL patterns
     */

            }
        } catch (MessagingException | IOException e) {
            throw new ExtractException(e);
        }
        return buf.toString();
    }

    /**
     * Appends attachment content to the buffer if it can be extracted.
     *
     * @param buf the buffer to append content to
     * @param bodyPart the body part containing the attachment
     */