return map.isEmpty();
    }

    @Override
    public boolean contains(final Object o) {
        return map.containsKey(o);
    }

    @Override
    public boolean add(final String o) {
        return map.put(o, PRESENT) == null;
    }

    @Override
    public boolean remove(final Object o) {
        return map.remove(o) == PRESENT;
    }

    @Override
    public void clear() {

     * Default constructor.
     */
    public CronExpressionValidator() {
        // Empty constructor
    }

    @Override
    public void initialize(final CronExpression constraintAnnotation) {
    }

    @Override
    public boolean isValid(final String value, final ConstraintValidatorContext context) {
        return determineValid(value);
    }

    /**
     * Determines if the given value is a valid cron expression.

    /** Serial version UID for serialization. */
    private static final long serialVersionUID = 1L;

    /**
     * Creates a new DictionaryException with the specified message and cause.
     *
     * @param message the detail message
     * @param cause the underlying cause of the exception
     */
    public DictionaryException(final String message, final Throwable cause) {
        super(message, cause);
    }

    /**

public class StorageException extends FessSystemException {
    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new storage exception with the specified detail message and cause.
     *
     * @param message The detail message.
     * @param cause   The cause of the exception.
     */
    public StorageException(final String message, final Throwable cause) {
        super(message, cause);
    }

    /**

import org.dbflute.utflute.core.PlainTestCase;

public class ResultDataTest extends PlainTestCase {

    public void test_setRawData() {
        // ## Arrange ##
        final ResultData resultData = new ResultData();
        final Object rawData = new Object();

        // ## Act ##
        resultData.setRawData(rawData);

        // ## Assert ##
        assertEquals(rawData, resultData.getRawData());

 * the order of magnitude of the generated values uniformly at random.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
final class MathBenchmarking {
  static final int ARRAY_SIZE = 0x10000;
  static final int ARRAY_MASK = 0x0ffff;
  static final Random RANDOM_SOURCE = new Random(314159265358979L);
  static final int MAX_EXPONENT = 100;

  /*
   * Duplicated from LongMath.
   * binomial(biggestBinomials[k], k) fits in a long, but not

     */
    public WebConfigPager() {
        // Default constructor
    }

    private static final long serialVersionUID = 1L;

    /**
     * Default page size for pagination.
     */
    public static final int DEFAULT_PAGE_SIZE = 20;

    /**
     * Default current page number.
     */
    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    /**
     * Total number of records.
     */

 */
public final class CrawlingParameterUtil {
    private static final ThreadLocal<UrlQueue<?>> URL_QUEUE_THREAD_LOCAL = new ThreadLocal<>();

    private static final ThreadLocal<CrawlerContext> ROBOT_CONTEXT_THREAD_LOCAL = new ThreadLocal<>();

    private static final ThreadLocal<UrlQueueService<UrlQueue<?>>> URL_QUEUE_SERVICE_THREAD_LOCAL = new ThreadLocal<>();

  private static final int ARRAY_SIZE = 0x10000;
  private static final int ARRAY_MASK = 0x0ffff;
  private static final Random randomSource = new Random(314159265358979L);
  private static final long[] longs = new long[ARRAY_SIZE];
  private static final long[] divisors = new long[ARRAY_SIZE];
  private static final String[] decimalStrings = new String[ARRAY_SIZE];
  private static final String[] binaryStrings = new String[ARRAY_SIZE];

   *
   * <p>Uses reflection to gracefully fall back to when certain implementations aren't available.
   */
  private static final class GetCheckedTypeValidatorHolder {
    static final String CLASS_VALUE_VALIDATOR_NAME =
        GetCheckedTypeValidatorHolder.class.getName() + "$ClassValueValidator";

    static final GetCheckedTypeValidator BEST_VALIDATOR = getBestValidator();

    @J2ObjCIncompatible // ClassValue