}

    private Dependency injectDependency(Dependency d) {
        // we cannot set this directly in the MDO due to the interactions with dependency management
        return (d.getScope() == null || d.getScope().isEmpty()) ? d.withScope("compile") : d;
    }

    /**
     * Returns a list suited for the builders, i.e. null if not modified
     */
    private <T> List<T> injectList(List<T> list, Function<T, T> modifer) {

         * {@link ReflectionValueExtractor} class.</p>
         */
        public Object getValue(String expression) {
            if (expression == null || expression.trim().isEmpty()) {
                return null;
            }

            try {
                return ReflectionValueExtractor.evaluate(expression, root, false);
            } catch (Exception e) {

    }

    public Artifact createPluginArtifact(Plugin plugin) {
        VersionRange versionRange;
        try {
            String version = plugin.getVersion();
            if (version == null || version.isEmpty()) {
                version = "RELEASE";
            }
            versionRange = VersionRange.createFromVersionSpec(version);
        } catch (InvalidVersionSpecificationException e) {
            return null;

        String base = basedir.getAbsolutePath();
        if (path.startsWith(base)) {
            path = chopLeadingFileSeparator(path.substring(base.length()));
        }

        if (path.isEmpty()) {
            path = ".";
        }

        if (!new File(path).isAbsolute()) {
            path = path.replace('\\', '/');
        }

        return path;
    }

                .stream()
                .map(MavenProject::getVersion)
                .collect(Collectors.collectingAndThen(Collectors.toList(), Collections::unmodifiableList));
        if (!versions.isEmpty()) {
            return versions;
        }
        return getAllProjects()
                .getOrDefault(artifact.getGroupId(), Collections.emptyMap())

            path.append(ARTIFACT_SEPARATOR).append(artifact.getClassifier());
        }

        if (artifactHandler.getExtension() != null
                && !artifactHandler.getExtension().isEmpty()) {
            path.append(GROUP_SEPARATOR).append(artifactHandler.getExtension());
        }

        return path.toString();
    }

                .filter(a -> a.getVersion().startsWith("3."))
                .map(a -> a.getGroupId() + ":" + a.getArtifactId() + ":" + a.getVersion())
                .collect(Collectors.toSet());

        if (!mavenArtifacts.isEmpty()) {
            pluginValidationManager.reportPluginValidationIssue(
                    PluginValidationManager.IssueLocality.EXTERNAL,
                    session,
                    pluginArtifact,

        try (Stream<String> lines = Arrays.stream(entries)) {
            List<Relocation> relocationList = lines.filter(
                            l -> l != null && !l.trim().isEmpty())
                    .map(l -> {
                        boolean global;
                        String splitExpr;
                        if (l.contains(">>")) {
                            global = true;

     */
    @Nonnull
    default String getId() {
        return getGroupId()
                + ":" + getArtifactId()
                + ":" + getExtension()
                + (getClassifier().isEmpty() ? "" : ":" + getClassifier())
                + ":" + getVersion();
    }

    }

    @Override
    public void accept(PluginDescriptor pluginDescriptor) {
        String requiredJavaVersion = pluginDescriptor.getRequiredJavaVersion();
        if (requiredJavaVersion != null && !requiredJavaVersion.isEmpty()) {
            String currentJavaVersion = System.getProperty("java.version");
            if (!matchesVersion(requiredJavaVersion, currentJavaVersion)) {