/**
   * A set containing none of the optional features of the {@link Iterator} or {@link ListIterator}
   * interfaces.
   */
  public static final Set<IteratorFeature> UNMODIFIABLE = emptySet();

  /**
   * A set containing all of the optional features of the {@link Iterator} and {@link ListIterator}
   * interfaces.
   */
  public static final Set<IteratorFeature> MODIFIABLE =

  /**
   * A set containing none of the optional features of the {@link Iterator} or {@link ListIterator}
   * interfaces.
   */
  public static final Set<IteratorFeature> UNMODIFIABLE = emptySet();

  /**
   * A set containing all of the optional features of the {@link Iterator} and {@link ListIterator}
   * interfaces.
   */
  public static final Set<IteratorFeature> MODIFIABLE =

            return;
        }

        // Query network interfaces from server
        queryRemoteInterfaces();

        // Discover local interfaces
        discoverLocalInterfaces();

        // Enable multi-channel if we have multiple usable interfaces
        if (canEnableMultiChannel()) {
            multiChannelEnabled = true;

 * the symmetry of {@code equals}. Custom definitions of equality are usually based on an interface,
 * such as {@code Set} or {@code List}, so that the implementation of {@code equals} can cast the
 * object being tested for equality to the custom interface. {@code ForwardingObject} implements no
 * such custom interfaces directly; they are implemented only in subclasses. Therefore, forwarding

            return;
        }
        
        // Query network interfaces from server
        queryRemoteInterfaces();
        
        // Discover local interfaces
        discoverLocalInterfaces();
        
        // Enable multi-channel if we have multiple usable interfaces
        if (canEnableMultiChannel()) {
            multiChannelEnabled = true;

    for (Class<? super T> itf : allInterfaceClasses) {
      Iterator<Class<?>> iterator = interfaceClasses.iterator();
      boolean addToSet = true;
      while (iterator.hasNext()) {
        Class<?> current = iterator.next();
        if (current == itf || itf.isAssignableFrom(current)) {
          // Skip any super interface of the ones that are already included.

    return Reflection.newProxy(List.class, new SubHandler2(delegate));
  }

  private static Object newProxyWithEqualsForInterfaces(Class<?>... interfaces) {
    return Proxy.newProxyInstance(
        AbstractInvocationHandlerTest.class.getClassLoader(),
        interfaces,
        new DelegatingInvocationHandlerWithEquals("a string"));
  }

  private static class DelegatingInvocationHandler extends AbstractInvocationHandler

import org.codelibs.fess.crawler.rule.Rule;
import org.codelibs.fess.crawler.rule.RuleManager;

import jakarta.annotation.Resource;

/**
 * Abstract base class for implementing {@link Rule} interfaces.
 * Provides common functionality and properties for crawler rules.
 *
 * <p>
 * This class handles the registration of rules with the {@link RuleManager}

            gatherTypeVariables(superClass, superClassType, map);
        }

        final Class<?>[] interfaces = clazz.getInterfaces();
        final Type[] interfaceTypes = clazz.getGenericInterfaces();
        for (int i = 0; i < interfaces.length; ++i) {
            gatherTypeVariables(interfaces[i], interfaceTypes[i], map);
        }

        return map;
    }

    /**

 *
 * <p>This is needed because annotations can't implement interfaces, which is also why reflection is
 * used to extract values from the properties of the various annotations.
 *
 * @author George van den Driessche
 */
@Target(value = {ElementType.ANNOTATION_TYPE})
@Retention(value = RetentionPolicy.RUNTIME)
@Documented
@GwtCompatible