assertNull(exception.getCause());
    }

    /**
     * Test protected constructor with suppression and stack trace control
     */
    public void test_protectedConstructor_withSuppressionAndStackTrace() throws Exception {
        // Access protected constructor via reflection
        Constructor<CrawlerSystemException> constructor =

/**
 * Extracts the filename from the parameters.
 */
public class FilenameExtractor extends AbstractExtractor {

    /**
     * Constructs a new FilenameExtractor.
     */
    public FilenameExtractor() {
        // Default constructor
    }

    /**
     * Extracts the filename from the parameters.
     * @param in The input stream (not used).

 */
public class FtpAuthenticationHolder {
    List<FtpAuthentication> authenticationList = new ArrayList<>();

    /**
     * Constructs a new FtpAuthenticationHolder.
     */
    public FtpAuthenticationHolder() {
        // Default constructor
    }

    /**
     * Adds an FtpAuthentication object to the holder.
     * @param auth The FtpAuthentication object to add.
     */

    protected int preloadSize = 512;

    /**
     * Creates a new SitemapsHelper instance.
     */
    public SitemapsHelper() {
        // Default constructor
    }

    /**
     * Checks if the given input stream contains valid sitemap data.
     * @param in the input stream to validate
     * @return true if the stream contains valid sitemap data, false otherwise

    /** Delay in milliseconds for waiting for new URLs */
    protected long delayMillisForWaitingNewUrl = 1000L;

    /**
     * Default constructor with default delay values.
     */
    public DefaultIntervalController() {
    }

    /**
     * Constructor with configurable delay parameters.
     *
     * @param params map containing delay parameters
     */

 *
 */
public class UnsupportedExtractException extends ExtractException {

    private static final long serialVersionUID = 1L;

    /**
     * Constructor.
     * @param message The error message.
     */
    public UnsupportedExtractException(final String message) {
        super(message, false, false);
    }

 * The class provides methods to add, retrieve, and manage these limits.
 */
public class ContentLengthHelper {
    /**
     * Constructs a new ContentLengthHelper.
     */
    public ContentLengthHelper() {
        // Default constructor
    }

    /** Default maximum content length set to 10MB */
    protected long defaultMaxLength = 10L * 1024L * 1024L;

 */
package org.codelibs.fess.crawler.util;

/**
 * Utility class for character-related operations.
 */
public final class CharUtil {
    /**
     * Private constructor to prevent instantiation of this utility class.
     */
    private CharUtil() {
    }

    /**
     * Checks if the given character is a valid URL character.
     *
     * Valid URL characters include:

 *
 * @param <T> the type of the pooled object
 */
public class CrawlerPooledObjectFactory<T> extends BasePooledObjectFactory<T> {
    /**
     * Constructs a new CrawlerPooledObjectFactory.
     */
    public CrawlerPooledObjectFactory() {
        // Default constructor
    }

    /**
     * The container that provides crawler components.
     */
    @Resource
    protected CrawlerContainer crawlerContainer;

import org.codelibs.fess.crawler.exception.CrawlingAccessException;

/**
 * Utility class for handling response data.
 */
public final class ResponseDataUtil {

    /**
     * Private constructor to prevent instantiation of this utility class.
     */
    private ResponseDataUtil() {
    }

    /**
     * Creates a temporary file containing the response body from the given ResponseData.
     *