model = new MavenXpp3Reader().read(is);
        }

        // Serialize an inner child here so that the BaseObject.childrenTracking is non null
        Build build = model.getBuild();

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (ObjectOutputStream oos = new ObjectOutputStream(baos)) {
            oos.writeObject(build);
        }

        Build build2;

                    + "-"
                    + jdk.getBuild()
                    + "/[module]/[classifier]/jdk/hotspot/normal/adoptium";
            } else {
                // current pattern since JDK 9
                artifactPattern = "jdk-"
                    + jdk.getBaseVersion()
                    + "+"
                    + jdk.getBuild()

        Properties properties =
                loadResumptionFile(Paths.get(rootProject.getBuild().getDirectory()));
        applyResumptionProperties(request, properties);
    }

    @Override
    public void removeResumptionData(MavenProject rootProject) {
        Path resumeProperties = Paths.get(rootProject.getBuild().getDirectory(), RESUME_PROPERTIES_FILENAME);
        try {
            Files.deleteIfExists(resumeProperties);

    private DuplicateMerger merger = new DuplicateMerger();

    @Override
    public void mergeDuplicates(Model model, ModelBuildingRequest request, ModelProblemCollector problems) {
        Build build = model.getBuild();
        if (build != null) {
            List<Plugin> plugins = build.getPlugins();
            Map<Object, Plugin> normalized = new LinkedHashMap<>(plugins.size() * 2);

            for (Plugin plugin : plugins) {

        when(build.getOutputDirectory()).thenReturn("target/classes");
        when(build.getTestOutputDirectory()).thenReturn("target/test-classes");

        Project project = mock(Project.class);
        when(project.getBuild()).thenReturn(build);
        when(project.getBasedir()).thenReturn(Path.of("myproject"));
        when(project.getOutputDirectory(any(ProjectScope.class))).thenCallRealMethod();

    @Override
    public void alignToBaseDirectory(Model model, File basedir) {
        if (basedir == null) {
            return;
        }

        Build build = model.getBuild();

        if (build != null) {
            build.setDirectory(alignToBaseDirectory(build.getDirectory(), basedir));

            build.setSourceDirectory(alignToBaseDirectory(build.getSourceDirectory(), basedir));

            if (project.hasLifecyclePhase("test-compile")) {
                return new File(project.getBuild().getTestOutputDirectory());
            }
        } else {
            String type = artifact.getProperty("type", "");
            File outputDirectory = new File(project.getBuild().getOutputDirectory());

            // Check if the project is being built during this session, and if we can expect any output.

    @Override
    public void expandPluginConfiguration(Model model, ModelBuildingRequest request, ModelProblemCollector problems) {
        Build build = model.getBuild();

        if (build != null) {
            expand(build.getPlugins());

            PluginManagement pluginManagement = build.getPluginManagement();

            if (pluginManagement != null) {

                + "      </plugin>\n"
                + "    </plugins>\n"
                + "  </build>\n"
                + "</project>";

        Model model = fromXml(xml);
        Plugin plugin = model.getBuild().getPlugins().get(0);
        XmlNode node = plugin.getConfiguration();
        assertNotNull(node);
        assertEquals("http://maven.apache.org/POM/4.0.0", node.namespaceUri());
        assertEquals("m", node.prefix());

        File pom1 = new File(pom0Basedir, "p1/pom.xml");

        getProjectWithDependencies(pom0);
        MavenProject project1 = getProjectWithDependencies(pom1);

        Map pluginMap = project1.getBuild().getPluginsAsMap();
        Plugin compilerPlugin = (Plugin) pluginMap.get("org.apache.maven.plugins:maven-compiler-plugin");

        assertNotNull(compilerPlugin);