<model>../../api/maven-api-metadata/src/main/mdo/metadata.mdo</model>
          </models>
          <params>
            <param>forcedIOModelVersion=1.1.0</param>
            <param>packageModelV3=org.apache.maven.artifact.repository.metadata</param>
            <param>packageModelV4=org.apache.maven.api.metadata</param>
            <param>packageToolV4=org.apache.maven.artifact.repository.metadata.io</param>
          </params>

					return
				}
			}
		case "Metadata":
			var zb0003 uint32
			zb0003, err = dc.ReadArrayHeader()
			if err != nil {
				err = msgp.WrapError(err, "Metadata")
				return
			}
			if cap(z.Metadata) >= int(zb0003) {
				z.Metadata = (z.Metadata)[:zb0003]
			} else {
				z.Metadata = make([]BatchJobKV, zb0003)
			}
			for za0002 := range z.Metadata {
				err = z.Metadata[za0002].DecodeMsg(dc)

import java.util.Objects;

import org.apache.maven.artifact.repository.metadata.Metadata;
import org.apache.maven.metadata.v4.MetadataStaxReader;

/**
 * Handles deserialization of metadata from some kind of textual format like XML.
 *
 */
@Named
@Singleton
public class DefaultMetadataReader implements MetadataReader {

    @Override
    public Metadata read(File input, Map<String, ?> options) throws IOException {

    /**
     * Gets the artifact to resolve metadata for.
     *
     * @return The artifact to resolve metadata for or {@code null} if not set.
     */
    Artifact getArtifact();

    /**
     * Sets the artifact for which to resolve metadata.
     *
     * @param artifact The artifact for which to resolve metadata.
     * @return This request, never {@code null}.
     */

### Internal metadata for replication

`xl.meta` that is in use for [versioning](https://github.com/minio/minio/blob/master/docs/bucket/versioning/DESIGN.md) has additional metadata for replication of objects,delete markers and versioned deletes.

import org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException;
import org.apache.maven.artifact.metadata.ArtifactMetadataSource;
import org.apache.maven.artifact.metadata.ResolutionGroup;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.Metadata;

// kmsKeyIDFromMetadata returns any AWS S3 KMS key ID in the
// metadata, if any. It returns an empty ID if no key ID is
// present.
func kmsKeyIDFromMetadata(metadata map[string]string) string {
	const ARNPrefix = crypto.ARNPrefix
	if len(metadata) == 0 {
		return ""
	}
	kmsID, ok := metadata[crypto.MetaKeyID]
	if !ok {
		return ""
	}
	if strings.HasPrefix(kmsID, ARNPrefix) {
		return kmsID

func TestGetObjectRetentionMeta(t *testing.T) {
	tests := []struct {
		metadata map[string]string
		expected ObjectRetention
	}{
		{
			metadata: map[string]string{
				"Authorization":        "AWS4-HMAC-SHA256 <cred_string>",
				"X-Amz-Content-Sha256": "",
				"Content-Encoding":     "",
			},
			expected: ObjectRetention{},
		},
		{
			metadata: map[string]string{
				"x-amz-object-lock-mode": "governance",
			},

import org.apache.maven.artifact.metadata.ArtifactMetadata;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.LegacyLocalRepositoryManager;
import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.MetadataBridge;
import org.apache.maven.artifact.repository.metadata.Snapshot;

// get ObjectOptions for PUT calls from encryption headers and metadata
func putOptsFromReq(ctx context.Context, r *http.Request, bucket, object string, metadata map[string]string) (opts ObjectOptions, err error) {
	return putOpts(ctx, bucket, object, r.Form.Get(xhttp.VersionID), r.Header, metadata)
}

func putOpts(ctx context.Context, bucket, object, vid string, hdrs http.Header, metadata map[string]string) (opts ObjectOptions, err error) {