results.add(result);

            Artifact artifact = request.getArtifact();
            if ("maven-test".equals(artifact.getGroupId())) {
                String scope = artifact.getArtifactId().substring("scope-".length());

                try {
                    artifact = artifact.setFile(ProjectClasspathTestType.getFileForClasspathResource(

     */
    String getGroupId();

    /**
     * Gets the artifact id of the constituent's artifact.
     *
     * @return The artifact id, never {@code null}.
     */
    String getArtifactId();

    /**
     * Gets the type of the constituent's artifact.
     *
     * @return The type, never {@code null}.
     */
    String getType();

    /**

            Build build = model.getBuild();
            if (build != null) {
                for (Plugin plugin : build.getPlugins()) {
                    if (groupId.equals(plugin.getGroupId()) && artifactId.equals(plugin.getArtifactId())) {
                        return plugin;
                    }
                }

                PluginManagement mgmt = build.getPluginManagement();
                if (mgmt != null) {

            if ("org.apache.maven".equals(dependency.getArtifact().getGroupId())
                    && "maven-compat".equals(dependency.getArtifact().getArtifactId())
                    && !DependencyScope.TEST.is(dependency.getScope())) {
                pluginValidationManager.reportPluginValidationIssue(
                        PluginValidationManager.IssueLocality.EXTERNAL,

        return dependency.getGroupId() + ":" + dependency.getArtifactId() + ":"
                + dependency.getType().id() + ":" + dependency.getClassifier();
    }

    private static String getDependencyKey(Dependency dependency) {
        return dependency.getGroupId() + ":" + dependency.getArtifactId() + ":"
                + (dependency.getType() != null ? dependency.getType() : "jar") + ":"

        public boolean storedInGroupDirectory() {
            return metadata.getArtifactId().isEmpty();
        }

        @Override
        public String getGroupId() {
            return nullify(metadata.getGroupId());
        }

        @Override
        public String getArtifactId() {
            return nullify(metadata.getArtifactId());
        }

        @Override

                cause);
        // Convert to old type
        CoreExtension oldExtension = new CoreExtension();
        oldExtension.setGroupId(extension.getGroupId());
        oldExtension.setArtifactId(extension.getArtifactId());
        oldExtension.setVersion(extension.getVersion());
        if (extension.getClassLoadingStrategy() != null) {
            oldExtension.setClassLoadingStrategy(extension.getClassLoadingStrategy());
        }

        this.patterns = new LinkedHashSet<>(patterns);
    }

    @Override
    public boolean include(Artifact artifact) {
        String id = artifact.getGroupId() + ":" + artifact.getArtifactId();

        boolean matched = false;
        for (Iterator<String> i = patterns.iterator(); i.hasNext() & !matched; ) {
            // TODO what about wildcards? Just specifying groups? versions?

            MavenProject project, List<ModelProblem> problems, DependencyResolutionResult dependencyResolutionResult) {
        this.projectId = (project != null)
                ? project.getGroupId() + ':' + project.getArtifactId() + ':' + project.getVersion()
                : "";
        this.pomFile = (project != null) ? project.getFile() : null;
        this.project = project;

                .filter(d -> "org.apache.maven".equals(d.getGroupId()))
                .filter(d -> !DefaultPluginValidationManager.EXPECTED_PROVIDED_SCOPE_EXCLUSIONS_GA.contains(
                        d.getGroupId() + ":" + d.getArtifactId()))
                .map(Artifact::getVersion)
                .filter(v -> v.startsWith("2."))
                .collect(Collectors.toSet());

        if (!maven2Versions.isEmpty()) {