&& Objects.equals(this.getVersion(), that.getVersion())
                && Objects.equals(this.getClassifier(), that.getClassifier());
    }

    @Override
    public int hashCode() {
        return Objects.hash(getGroupId(), getArtifactId(), getVersion(), getClassifier());
    }

    @Override
    public String toString() {
        return coordinate.toString();
    }

    private final Collection<String> scopesToResolveForAggregatedProjects;

    private volatile Collection<?> lastDependencyArtifacts = Collections.emptyList();

    private volatile int lastDependencyArtifactCount = -1;

    public DependencyContext(
            MavenProject project, Collection<String> scopesToCollect, Collection<String> scopesToResolve) {
        this.project = project;

            //                        new Comparator<MetadataGraphEdge>()
            //                        {
            //                            public int compare( MetadataGraphEdge e1
            //                                              , MetadataGraphEdge e2
            //                                              )
            //                            {

        }

        return lifecycleMappings;
    }

    private void addMojoExecution(
            Map<Integer, List<MojoExecution>> phaseBindings, MojoExecution mojoExecution, int priority) {
        List<MojoExecution> mojoExecutions = phaseBindings.computeIfAbsent(priority, k -> new ArrayList<>());

        mojoExecutions.add(mojoExecution);
    }

                .append(mojo.getPluginDescriptor().getGoalPrefix())
                .append(':')
                .append(mojo.getGoal())
                .append("'")
                .append(LS);

        int idx = 0;
        for (Iterator<Parameter> it = params.iterator(); it.hasNext(); idx++) {
            Parameter param = it.next();

            messageBuffer.append(LS).append("[").append(idx).append("] ");

                error);
    }

    public ArtifactMetadata(Artifact af) {
        /*
        if ( af != null )
        {
            init( af );
        }
        */
    }
    // ------------------------------------------------------------------
    //    public void init( ArtifactMetadata af )
    //    {
    //        setGroupId( af.getGroupId() );
    //        setArtifactId( af.getArtifactId() );

    private DefaultSessionFactory sessionFactory;

    @Inject
    EventSpyImpl(DefaultSessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    @Override
    public void init(Context context) throws Exception {}

    @Override
    public void onEvent(Object arg) throws Exception {
        if (arg instanceof ExecutionEvent) {
            ExecutionEvent ee = (ExecutionEvent) arg;

     */
    public static final int TRANSFER_ERROR = 4;

    /**
     * Indicates GET transfer  (from the repository)
     */
    public static final int REQUEST_GET = 5;

    /**
     * Indicates PUT transfer (to the repository)
     */
    public static final int REQUEST_PUT = 6;

    private int eventType;

    private int requestType;

    private Exception exception;

public class MetadataParseException extends IOException {

    /**
     * The one-based index of the line containing the error.
     */
    private final int lineNumber;

    /**
     * The one-based index of the column containing the error.
     */
    private final int columnNumber;

    /**
     * Creates a new parser exception with the specified details.
     *
     * @param message The error message, may be {@code null}.

 * compares two versions.
 *
 */
public interface ArtifactVersion extends Comparable<ArtifactVersion> {
    int getMajorVersion();

    int getMinorVersion();

    int getIncrementalVersion();

    int getBuildNumber();

    String getQualifier();

    void parseVersion(String version);