{
                        java.util.Map<String, SnapshotVersion> versions = new java.util.LinkedHashMap<>();
                        // never convert from legacy to new format if either source or target is legacy format
                        if ( !v.getSnapshotVersions().isEmpty() )
                        {
                            for ( SnapshotVersion sv : versioning.getSnapshotVersions() )

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 {

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

    }

    @Override
    protected void merge(Metadata recessive) {
        metadata = metadata.withVersioning(metadata.getVersioning().withLastUpdated(fmt.format(timestamp)));

        String lastUpdated = metadata.getVersioning().getLastUpdated();

        Map<String, SnapshotVersion> versions = new LinkedHashMap<>();

        for (Artifact artifact : artifacts) {

                                connectTimeout = Integer.parseInt(connectTimeoutXml.getValue());
                                logger.warn("Settings for server {} uses legacy format", server.getId());
                            }
                        }
                    }
                }

                PlexusConfiguration requestTimeoutXml = config.getChild("requestTimeout", false);

                    problems,
                    severity,
                    version,
                    fieldName,
                    sourceHint,
                    "uses an unsupported snapshot version format, should be '*-SNAPSHOT' instead.",
                    tracker);
            return false;
        }

        return true;
    }

    private boolean validate20PluginVersion(

            utcDateFormatter.setCalendar(new GregorianCalendar());
            utcDateFormatter.setTimeZone(DEFAULT_SNAPSHOT_TIME_ZONE);

            snapshot = Snapshot.newBuilder()
                    .buildNumber(buildNumber != null ? buildNumber : getBuildNumber(recessive) + 1)
                    .timestamp(utcDateFormatter.format(this.timestamp))
                    .build();

                // Message below is checked for in the MNG-2199 core IT.
                throw new ModelResolverException(
                        String.format("The requested version range '%s' does not specify an upper bound", version),
                        groupId,
                        artifactId,
                        version);
            }

     * @return The deserialized model, never {@code null}.
     * @throws IOException If the model could not be deserialized.
     * @throws XmlReaderException If the input format could not be parsed.
     */
    Model read(XmlReaderRequest request) throws IOException, XmlReaderException;

     */
    public ModelBuilderResult getResult() {
        return result;
    }

    /**
     * Gets the identifier of the POM whose effective model could not be built. The general format of the identifier is
     * {@code <groupId>:<artifactId>:<version>} but some of these coordinates may still be unknown at the point the
     * exception is thrown so this information is merely meant to assist the user.
     *