assertFalse(ArtifactUtils.isSnapshot(null));
        assertFalse(ArtifactUtils.isSnapshot(""));
        assertFalse(ArtifactUtils.isSnapshot("1.2.3"));
        assertTrue(ArtifactUtils.isSnapshot("1.2.3-SNAPSHOT"));
        assertTrue(ArtifactUtils.isSnapshot("1.2.3-snapshot"));
        assertTrue(ArtifactUtils.isSnapshot("1.2.3-20090413.094722-2"));
        assertFalse(ArtifactUtils.isSnapshot("1.2.3-20090413X094722-2"));
    }

    }

    public Object getKey() {
        return "snapshot " + artifact.getGroupId() + ":" + artifact.getArtifactId() + ":" + artifact.getBaseVersion();
    }

    public boolean isSnapshot() {
        return artifact.isSnapshot();
    }

    public int getNature() {
        return isSnapshot() ? SNAPSHOT : RELEASE;
    }

    public ArtifactRepository getRepository() {

        String version = null;
        Snapshot snapshot = versioning.getSnapshot();
        if (snapshot != null) {
            if (snapshot.getTimestamp() != null && snapshot.getBuildNumber() > 0) {
                String newVersion = snapshot.getTimestamp() + "-" + snapshot.getBuildNumber();
                version = baseVersion.replace(Artifact.SNAPSHOT_VERSION, newVersion);
            } else {

                if (isSnapshot(restriction.getLowerBound()) || isSnapshot(restriction.getUpperBound())) {
                    return RELEASE_OR_SNAPSHOT;
                }
            }
        }

        return RELEASE;
    }

    private boolean isSnapshot(ArtifactVersion version) {
        return version != null && ArtifactUtils.isSnapshot(version.getQualifier());
    }

    public VersionConstraint parseVersionConstraint(String constraint) {
        return modelVersionParser.parseVersionConstraint(constraint);
    }

    @Override
    public boolean isSnapshot(String version) {
        return modelVersionParser.isSnapshot(version);
    }

        throw new UnsupportedOperationException("Cannot change the version information for an attached artifact."
                + " It is derived from the main artifact.");
    }

    public boolean isSnapshot() {
        return parent.isSnapshot();
    }

    public void addMetadata(ArtifactMetadata metadata) {
        // ignore. The parent artifact will handle metadata.

            ReleasedVersions(
                if (currentReleasedVersion.gradleVersion().isSnapshot) {
                    newerVersion(currentReleasedVersion, releasedVersions.latestReleaseSnapshot)
                } else {
                    releasedVersions.latestReleaseSnapshot
                },
                if (!currentReleasedVersion.gradleVersion().isSnapshot && !currentReleasedVersion.gradleVersion().finalRelease()) {

    }

    @Override
    public String getVersion() {
        return "";
    }

    @Override
    public Nature getNature() {
        return artifact.isSnapshot() ? Nature.RELEASE_OR_SNAPSHOT : Nature.RELEASE;
    }

    public VersionConstraint parseVersionConstraint(String constraint) {
        return modelVersionParser.parseVersionConstraint(constraint);
    }

    @Override
    public boolean isSnapshot(String version) {
        return modelVersionParser.isSnapshot(version);
    }

import org.eclipse.aether.metadata.Metadata;
import org.eclipse.aether.util.ConfigUtils;

/**
 * Maven remote GAV level metadata generator.
 * <p>
 * Remote snapshot metadata converts artifact on-the-fly to use timestamped snapshot version, and enlist it accordingly.
 */
class RemoteSnapshotMetadataGenerator implements MetadataGenerator {

    private final Map<Object, RemoteSnapshotMetadata> snapshots;