//
// S3 specifies three types of server-side-encryption - SSE-C, SSE-S3
// and SSE-KMS - with different semantics w.r.t. ETags.
// In case of SSE-S3, the ETag of an object is computed the same as
// for single resp. multipart plaintext objects. In particular,
// the ETag of a singlepart SSE-S3 object is its content MD5.
//
// In case of SSE-C and SSE-KMS, the ETag of an object is computed

  }

  public void testAsSet_present() {
    Set<String> expected = Collections.singleton("a");
    assertEquals(expected, Optional.of("a").asSet());
  }

  public void testAsSet_absent() {
    assertTrue("Returned set should be empty", Optional.absent().asSet().isEmpty());
  }

  public void testAsSet_presentIsImmutable() {
    Set<String> presentAsSet = Optional.of("a").asSet();

	"github.com/minio/pkg/v3/env"
)

const (
	// EnvKMSAutoEncryption is the environment variable used to en/disable
	// SSE-S3 auto-encryption. SSE-S3 auto-encryption, if enabled,
	// requires a valid KMS configuration and turns any non-SSE-C
	// request into an SSE-S3 request.
	// If present EnvAutoEncryption must be either "on" or "off".
	EnvKMSAutoEncryption = "MINIO_KMS_AUTO_ENCRYPTION"
)

  public T or(Supplier<? extends T> supplier) {
    checkNotNull(supplier);
    return reference;
  }

  @Override
  public T orNull() {
    return reference;
  }

  @Override
  public Set<T> asSet() {
    return Collections.singleton(reference);
  }

  @Override
  public <V> Optional<V> transform(Function<? super T, V> function) {
    return new Present<>(
        checkNotNull(

			return true
		}
	}
	if osIsNotExist(err) {
		// if none of the files are present we may be running inside
		// CRI-O, Containerd etc..
		// Fallback to our container specific ENVs if they are set.
		return env.IsSet("MINIO_ACCESS_KEY_FILE")
	}

	// Log error, as we will not propagate it to caller
	internalLogIf(GlobalContext, err)

	return err == nil
}

        supplier.get(), "use Optional.orNull() instead of a Supplier that returns null");
  }

  @Override
  public @Nullable T orNull() {
    return null;
  }

  @Override
  public Set<T> asSet() {
    return Collections.emptySet();
  }

  @Override
  public <V> Optional<V> transform(Function<? super T, V> function) {
    checkNotNull(function);
    return Optional.absent();
  }

  @Override

	globalIsErasureSD = false

	// Indicates if server code should go through testing path.
	globalIsTesting = false

	// This flag is set to 'true' by default
	globalBrowserEnabled = true

	// Custom browser redirect URL, not set by default
	// and it is automatically deduced.
	globalBrowserRedirectURL *xnet.URL

	// Disable redirect, default is enabled.
	globalBrowserRedirect bool

		return v[i].ModTime.Before(v[j].ModTime)
	})
}

func (set *erasureObjects) listObjectsToDecommission(ctx context.Context, bi decomBucketInfo, fn func(entry metaCacheEntry)) error {
	disks, _ := set.getOnlineDisksWithHealing(false)
	if len(disks) == 0 {
		return fmt.Errorf("no online drives found for set with endpoints %s", set.getEndpoints())
	}

	// However many we ask, versions must exist on ~50%

			switch kind, _ := crypto.IsEncrypted(object.UserDefined); kind {
			case crypto.S3:
				content.UserMetadata.Set(xhttp.AmzServerSideEncryption, xhttp.AmzEncryptionAES)
			case crypto.S3KMS:
				content.UserMetadata.Set(xhttp.AmzServerSideEncryption, xhttp.AmzEncryptionKMS)
			case crypto.SSEC:
				content.UserMetadata.Set(xhttp.AmzServerSideEncryptionCustomerAlgorithm, xhttp.AmzEncryptionAES)
			}

    ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
  }

  TF_Operation* Use(const std::vector<TF_Operation*>& inputs) {
    return UseT(ToOutput(inputs));
  }

  TF_Operation* UseT(const std::vector<TF_Output>& inputs) {
    TF_Operation* op;
    UseHelper(inputs, &op);
    return op;
  }