*
     * @return The decrypted server or {@code null}.
     */
    Server getServer();

    /**
     * Gets the decrypted servers.
     *
     * @return The decrypted server, can be empty but never {@code null}.
     */
    List<Server> getServers();

    /**

 */
@Deprecated(since = "4.0.0")
public class MavenToolchainMerger {

    public void merge(PersistedToolchains dominant, PersistedToolchains recessive, String recessiveSourceLevel) {
        if (dominant == null || recessive == null) {
            return;
        }

        recessive.setSourceLevel(recessiveSourceLevel);

        shallowMerge(dominant.getToolchains(), recessive.getToolchains(), recessiveSourceLevel);
    }

        this(session, project, null, null);
    }

    public ProjectExecutionEvent(MavenSession session, MavenProject project, List<MojoExecution> executionPlan) {
        this(session, project, executionPlan, null);
    }

    public ProjectExecutionEvent(MavenSession session, MavenProject project, Throwable cause) {
        this(session, project, null, cause);
    }

    public ProjectExecutionEvent(

        return this;
    }

    @Override
    public void normalize(Model model, ModelBuildingRequest request) {
        if (model == null) {
            return;
        }

        model.setUrl(normalize(model.getUrl()));

        Scm scm = model.getScm();
        if (scm != null) {
            scm.setUrl(normalize(scm.getUrl()));
            scm.setConnection(normalize(scm.getConnection()));

    private final int hashCode;

    /**
     * Creates a new source backed by the specified URL.
     *
     * @param url The file, must not be {@code null}.
     */
    public UrlSource(URL url) {
        this.url = Objects.requireNonNull(url, "url cannot be null");
        this.hashCode = Objects.hashCode(url);
    }

    @Override
    public InputStream getInputStream() throws IOException {

        notBlank(groupId, "groupId can neither be null, empty nor blank");
        notBlank(artifactId, "artifactId can neither be null, empty nor blank");
        notBlank(version, "version can neither be null, empty nor blank");

        return groupId + ":" + artifactId + ":" + version;
    }

    private static void notBlank(String str, String message) {
        final int strLen = str != null ? str.length() : 0;
        if (strLen > 0) {

        // Intentionally notNull because Super POM may not contain a modelId
        Objects.requireNonNull(modelId, "modelId cannot null");

        if (activeProfiles != null) {
            this.activePomProfiles.put(modelId, new ArrayList<>(activeProfiles));
        } else {
            this.activePomProfiles.remove(modelId);
        }

        return this;

        this.lookup = requireNonNull(lookup, "lookup cannot be null");
        this.languageRegistry = requireNonNull(languageRegistry, "languageRegistry cannot be null");
        this.usedTypes = new ConcurrentHashMap<>();
        this.manager = requireNonNull(manager, "artifactHandlerManager cannot be null");
    }

    @Override
    public void onEvent(Object event) {

    private List<Artifact> getTrail() throws OverConstrainedVersionException {
        if (trail == null) {
            List<Artifact> ids = new LinkedList<>();
            ResolutionNode node = this;
            while (node != null) {
                Artifact artifact = node.getArtifact();
                if (artifact.getVersion() == null) {
                    // set the recommended version

        this.mojoDescriptor = mojoDescriptor;
        this.executionId = null;
        this.configuration = null;
    }

    public MojoExecution(MojoDescriptor mojoDescriptor, String executionId, Source source) {
        this.mojoDescriptor = mojoDescriptor;
        this.executionId = executionId;
        this.configuration = null;
        this.source = source;
    }