* default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingNavigableMap}.
 *
 * <p>Each of the {@code standard} methods uses the map's comparator (or the natural ordering of the
 * elements, if there is no comparator) to test element equality. As a result, if the comparator is

        return Equivalence.identity();
      }
    };

    /**
     * Returns the default equivalence strategy used to compare and hash keys or values referenced
     * at this strength. This strategy will be used unless the user explicitly specifies an
     * alternate strategy.
     */
    abstract Equivalence<Object> defaultEquivalence();
  }

  /**

   * evaluated lazily.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this method has no equivalent in Java 8's
   * {@code Optional} class; use {@code
   * optionals.stream().filter(Optional::isPresent).map(Optional::get)} instead.
   *
   * <p><b>Java 9 users:</b> use {@code optionals.stream().flatMap(Optional::stream)} instead.
   *
   * @since 11.0 (generics widened in 13.0)
   */

        assertTrue(item1.equals(item2));
    }

    @Test
    public void test_equals_withNullOutput() {
        // Test equals with null output - should not throw, uses null-safe comparison
        String[] inputs1 = { "a", "b" };
        String[] inputs2 = { "a", "b" };
        String[] inputs3 = { "c", "d" };

        CharMappingItem item1 = new CharMappingItem(1L, inputs1, null);

// Add file URL
crawler.addUrl("file:///path/to/directory");
crawler.urlFilter.addInclude("file:///path/to/directory/.*");
```

## Configuration

### XML Configuration

Fess Crawler uses XML-based configuration with LastaFlute DI. Place configuration files in your classpath:

```xml
<!-- crawler.xml -->
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"

   * probably not what you want to use.
   */
  @Override
  public final int hashCode() {
    // If we have at least 4 bytes (32 bits), just take the first 4 bytes. Since this is
    // already a (presumably) high-quality hash code, any four bytes of it will do.
    if (bits() >= 32) {
      return asInt();
    }
    // If we have less than 4 bytes, use them all.
    byte[] bytes = getBytesInternal();

                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

   1. Definitions.

      "License" shall mean the terms and conditions for use, reproduction,
      and distribution as defined by Sections 1 through 9 of this document.

      "Licensor" shall mean the copyright owner or entity authorized by

  /**
   * @deprecated Provided only to satisfy the {@link BiPredicate} interface; use {@link #equivalent}
   *     instead.
   * @since 21.0
   */
  @InlineMe(replacement = "this.equivalent(t, u)")
  @Deprecated
  @Override
  public final boolean test(@Nullable T t, @Nullable T u) {
    return equivalent(t, u);
  }

  /**
   * Implemented by the user to determine whether {@code a} and {@code b} are considered equivalent,

	EnvKMSAPIKey     = "MINIO_KMS_API_KEY" // Credential to access the MinIO KMS.
)

// Environment variables for MinIO KES.
const (
	EnvKESEndpoint       = "MINIO_KMS_KES_ENDPOINT"     // One or multiple KES endpoints, separated by ','

            durationInNanos(that.refreshDuration, that.refreshTimeUnit));
  }

  /**
   * Converts an expiration duration/unit pair into a single Long for hashing and equality. Uses
   * nanos to match CacheBuilder implementation.
   */
  private static @Nullable Long durationInNanos(long duration, @Nullable TimeUnit unit) {
    return (unit == null) ? null : unit.toNanos(duration);
  }