public interface ClassRealmManager {

    /**
     * Gets the class realm hosting the Maven core.
     *
     * @return The class realm hosting the Maven core, never {@code null}.
     */
    ClassRealm getCoreRealm();

    /**
     * Gets the class realm exposing the Maven API. This is basically a restricted view on the Maven core realm.
     *
     * @return The class realm exposing the Maven API, never {@code null}.
     */

        /**
         * A class realm for a build extension.
         */
        Extension,

        /**
         * A class realm for a plugin.
         */
        Plugin,
    }

    /**
     * Gets the type of the class realm.
     *
     * @return The type of the class realm, never {@code null}.
     */
    RealmType getType();

    /**
     * Gets the parent class realm (if any).
     *

) {
  /**
   * Returns the auth params, including [realm] and [charset] if present, but as
   * strings. The map's keys are lowercase and should be treated case-insensitively.
   */
  @get:JvmName("authParams")
  val authParams: Map<String?, String>

  /** Returns the protection space. */
  @get:JvmName("realm")
  val realm: String?
    get() = authParams["realm"]

        public ClassRealm getRealm() {
            return realm;
        }

        public List<Artifact> getArtifacts() {
            return artifacts;
        }

        private final ClassRealm realm;

        private final List<Artifact> artifacts;

        public CacheRecord(ClassRealm realm, List<Artifact> artifacts) {
            this.realm = realm;
            this.artifacts = artifacts;
        }
    }

            return realm;
        }

        public DependencyFilter getExtensionArtifactFilter() {
            return extensionArtifactFilter;
        }

        private final ClassRealm realm;

        private final DependencyFilter extensionArtifactFilter;

        CacheRecord(ClassRealm realm, DependencyFilter extensionArtifactFilter) {
            this.realm = realm;

    /**
     * CacheRecord
     */
    class CacheRecord {

        private final ClassRealm realm;

        private final ExtensionDescriptor descriptor;

        private final List<Artifact> artifacts;

        CacheRecord(ClassRealm realm, ExtensionDescriptor descriptor, List<Artifact> artifacts) {
            this.realm = realm;
            this.descriptor = descriptor;
            this.artifacts = artifacts;
        }

            final ExpressionEvaluator evaluator,
            final ClassRealm realm,
            final ConfigurationListener listener)
            throws ComponentConfigurationException {
        try {
            ClassRealmConverter.pushContextRealm(realm);

            this.configureComponent(component, configuration, evaluator, (ClassLoader) realm, listener);
        } finally {
            ClassRealmConverter.popContextRealm();

            throws InvalidRepositoryException;

    /**
     * Creates the project realm that hosts the build extensions of the specified model.
     *
     * @param project The project to create the project realm for, must not be {@code null}
     * @param model The model to create the project realm for, must not be {@code null}

        if (realm != null) {
            assert realm.username == username
            assert realm.password == password
            authenticationScheme.handler.addConstraint(securityHandler, path)
        } else {
            realm = new TestUserRealm(username, password)
            securityHandler = authenticationScheme.handler.createSecurityHandler(path, realm)

    private final String key;

    private final XmlNode configuration;

    public CoreExtensionEntry(
            ClassRealm realm,
            Collection<String> artifacts,
            Collection<String> packages,
            String key,
            XmlNode configuration) {
        this.realm = realm;
        this.artifacts = Collections.unmodifiableSet(new HashSet<>(artifacts));