if (session.getCache() == null) {
            return null;
        } else {
            return new DefaultModelCache(session);
        }
    }

    private DefaultModelCache(RepositorySystemSession session) {
        this.session = session;
        this.cache = session.getCache();
    }

    @Override

        PluginVersionResult result = resolveFromProject(request);

        if (result == null) {
            ConcurrentMap<Key, PluginVersionResult> cache = getCache(request);
            Key key = getKey(request);
            result = cache.get(key);

            if (result == null) {
                result = resolveFromRepository(request);

                logger.debug(

        if (parent != null) {
            String groupId = parent.getGroupId();
            String artifactId = parent.getArtifactId();
            String version = parent.getVersion();

            parentData = getCache(request.getModelCache(), groupId, artifactId, version, ModelCacheTag.RAW);

            if (parentData == null) {
                parentData = readParentLocally(childModel, childSource, request, problems);

    @Test
    void testReadModifiedPoms(@TempDir Path tempDir) throws Exception {
        // TODO a similar test should be created to test the dependency management (basically all usages
        // of DefaultModelBuilder.getCache() are affected by MNG-6530

        FileUtils.copyDirectoryStructure(new File("src/test/resources/projects/grandchild-check"), tempDir.toFile());

        MavenSession mavenSession = createMavenSession(null);

        String version = artifact.getVersion();

        VersionResult result = new VersionResult(request);

        Key cacheKey = null;
        RepositoryCache cache = session.getCache();
        if (cache != null && !ConfigUtils.getBoolean(session, false, "aether.versionResolver.noCache")) {
            cacheKey = new Key(session, request);

            Object obj = cache.get(session, cacheKey);

        SessionScope scope = container.lookup(SessionScope.class);
        scope.enter();
        scope.seed(Session.class, s);
        scope.seed(InternalMavenSession.class, s);

        repoSession.setCache(new DefaultRepositoryCache());
        repoSession.setLocalRepositoryManager(new LegacyLocalRepositoryManager(localRepo));
        request.setRepositorySession(repoSession);
    }

    }

    //
    // Used by Tycho and will break users and force them to upgrade to Maven 3.1 so we should really leave
    // this here, possibly indefinitely.
    //
    public ArtifactResolutionRequest setCache(RepositoryCache cache) {
        return this;
    }

        SessionBuilder sessionBuilder = supplier.get();
        sessionBuilder.setArtifactTypeRegistry(new TypeRegistryAdapter(typeRegistry)); // dynamic
        sessionBuilder.setCache(request.getRepositoryCache());

        // configProps map is kept "pristine", is written ONLY, the mandatory resolver config
        Map<String, Object> configProps = new LinkedHashMap<>();