String getDirectory();

    /**
     * Returns the default classifier used if a different one is not set in pom.xml.
     *
     * @return the classifier
     */
    String getClassifier();

    String getPackaging();

    boolean isIncludesDependencies();

    String getLanguage();

    /**
     * Specifies if the artifact contains java classes and can be added to the classpath.

                assertEquals(handler.getExtension(), extension, type + " extension");
                // Packaging/Directory is Maven1 remnant!!!
                // assertEquals(handler.getPackaging(), packaging, type + " packaging");
                assertEquals(handler.getClassifier(), classifier, type + " classifier");
                assertEquals(handler.getLanguage(), language, type + " language");

            return "jar";
        }

        @Override
        public String getLanguage() {
            return "none";
        }

        @Override
        public String getPackaging() {
            return "maven-plugin";
        }

        @Override
        @Deprecated
        public boolean isAddedToClasspath() {
            return true;
        }

        @Override

                source.getScope(),
                extension,
                classifier,
                new TransformedArtifactHandler(
                        classifier, extension, source.getArtifactHandler().getPackaging()));
        this.pomArtifactTransformer = pomArtifactTransformer;
        this.project = project;
        this.target = target;
        this.session = session;
        this.sourcePathProvider = sourcePathProvider;

        this.lifecycle = lifecycle;
    }

    @Override
    public void injectLifecycleBindings(Model model, ModelBuildingRequest request, ModelProblemCollector problems) {
        String packaging = model.getPackaging();

        Collection<Plugin> defaultPlugins = lifecycle.getPluginsBoundByDefaultToAllLifecycles(packaging);

        if (defaultPlugins == null) {

     * to locate attached artifacts.
     *
     * @param project the project to copy artifacts from
     */
    private void installIntoProjectLocalRepository(MavenProject project) {
        if ("pom".equals(project.getPackaging())
                        && !"clean".equals(getLifecycles(project).peekLast())
                || hasBeenPackagedDuringThisSession(project)) {

            if (!"pom".equals(parentModel.getPackaging())) {
                problems.add(new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
                        .setMessage("Invalid packaging for parent POM " + ModelProblemUtils.toSourceHint(parentModel)
                                + ", must be \"pom\" but is \"" + parentModel.getPackaging() + "\"")

        validateId("artifactId", problems, m.getArtifactId(), m);

        validateStringNotEmpty("packaging", problems, Severity.ERROR, Version.BASE, m.getPackaging(), m);

        if (!m.getModules().isEmpty()) {
            if (!"pom".equals(m.getPackaging())) {
                addViolation(
                        problems,
                        Severity.ERROR,
                        Version.BASE,

    }

    private void validatePrerequisitesForNonMavenPluginProjects(List<MavenProject> projects) {
        for (MavenProject mavenProject : projects) {
            if (!"maven-plugin".equals(mavenProject.getPackaging())) {
                Prerequisites prerequisites =
                        mavenProject.getModel().getDelegate().getPrerequisites();
                if (prerequisites != null && prerequisites.getMaven() != null) {

            initParent(project, result);

            Artifact projectArtifact = repositorySystem.createArtifact(
                    project.getGroupId(), project.getArtifactId(), project.getVersion(), null, project.getPackaging());
            project.setArtifact(projectArtifact);

            // only set those on 2nd phase, ignore on 1st pass
            if (project.getFile() != null) {