private Set<String> filterIncludedArtifacts(Set<String> artifacts) {

        Set<Artifact> dependencies;
        try {
            Artifact artifact = project.getArtifactMap().get(getMainDepGroupId() + ":" + getMainDepArtifactId());
            ProjectBuildingResult result = projectBuilder.build(artifact, project.getProjectBuildingRequest());
            MavenProject prj = result.getProject();
            prj.setRemoteArtifactRepositories(project.getRemoteArtifactRepositories());
            dependencies = projectDependenciesResolver.resolve(prj, Collections.singleton(Artifact.SCOPE_COMPILE), session);
        } catch (Exception e) {
            throw new RuntimeException("Unable to build project dependency tree", e);
        }

        Set<String> included = new TreeSet<>();
        dependencies.stream()
                .filter(a -> !Artifact.SCOPE_TEST.equals(a.getScope()))
                .map(a -> a.getGroupId() + ":" + a.getArtifactId())
                .forEach(included::add);
        included.retainAll(artifacts);

        return included;
    }
 

public MavenExecutionResult readProjectWithDependencies(MavenExecutionRequest req, boolean useWorkspaceResolution) {
    if (useWorkspaceResolution) {
        req.setWorkspaceReader(new NbWorkspaceReader());
    }
    File pomFile = req.getPom();
    MavenExecutionResult result = new DefaultMavenExecutionResult();
    try {
        ProjectBuildingRequest configuration = req.getProjectBuildingRequest();
        configuration.setValidationLevel(ModelBuildingRequest.VALIDATION_LEVEL_MINIMAL);
        configuration.setResolveDependencies(true);
        configuration.setRepositorySession(maven.newRepositorySession(req));
        ProjectBuildingResult projectBuildingResult = projectBuilder.build(pomFile, configuration);
        result.setProject(projectBuildingResult.getProject());
        result.setDependencyResolutionResult(projectBuildingResult.getDependencyResolutionResult());
    } catch (ProjectBuildingException ex) {
        //don't add the exception here. this should come out as a build marker, not fill
        //the error logs with msgs
        return result.addException(ex);
    }
    normalizePaths(result.getProject());
    return result;
}
 

private MavenProject load(ArtifactInfo ai) {
    try {
        Artifact projectArtifact = embedder.createArtifact(ai.getGroupId(), ai.getArtifactId(), ai.getVersion(), ai.getPackaging() != null ? ai.getPackaging() : "jar");
        ProjectBuildingRequest dpbr = embedder.createMavenExecutionRequest().getProjectBuildingRequest();
        //mkleint: remote repositories don't matter we use project embedder.
        dpbr.setRemoteRepositories(remoteRepos);
        dpbr.setProcessPlugins(false);
        dpbr.setValidationLevel(ModelBuildingRequest.VALIDATION_LEVEL_MINIMAL);

        ProjectBuildingResult res = embedder.buildProject(projectArtifact, dpbr);
        if (res.getProject() != null) {
            return res.getProject();
        } else {
            LOG.log(Level.FINER, "No project model from repository for {0}: {1}", new Object[] {ai, res.getProblems()});
        }
    } catch (ProjectBuildingException ex) {
        LOG.log(Level.FINER, "Failed to load project model from repository for {0}: {1}", new Object[] {ai, ex});
    } catch (Exception exception) {
        LOG.log(Level.FINER, "Failed to load project model from repository for " + ai, exception);
    }
    return null;
}
 

private Set<Artifact> getNarDependencies(final Artifact narArtifact) throws MojoExecutionException, ProjectBuildingException {
    final ProjectBuildingRequest narRequest = new DefaultProjectBuildingRequest();
    narRequest.setRepositorySession(repoSession);
    narRequest.setSystemProperties(System.getProperties());
    narRequest.setLocalRepository(localRepo);

    final ProjectBuildingResult narResult = projectBuilder.build(narArtifact, narRequest);

    final Set<Artifact> narDependencies = new TreeSet<>();
    gatherArtifacts(narResult.getProject(), narDependencies);
    narDependencies.remove(narArtifact);
    narDependencies.remove(project.getArtifact());

    getLog().debug("Found NAR dependency of " + narArtifact + ", which resolved to the following artifacts: " + narDependencies);
    return narDependencies;
}
 

public List<Dependency> resolveDependenciesFromPOM(File pomFile) throws Exception
{
   PlexusContainer plexus = new PlexusContainer();
   List<Dependency> result;
   try
   {
      ProjectBuildingRequest request = getBuildingRequest(plexus);
      request.setResolveDependencies(true);
      ProjectBuilder builder = plexus.lookup(ProjectBuilder.class);
      ProjectBuildingResult build = builder.build(pomFile, request);
      result = build.getDependencyResolutionResult().getDependencies();
   }
   finally
   {
      plexus.shutdown();
   }
   return result;
}
 

static MavenProject createMavenProject(Path pomFile, RepositorySystemSession session)
    throws MavenRepositoryException {
  // MavenCli's way to instantiate PlexusContainer
  ClassWorld classWorld =
      new ClassWorld("plexus.core", Thread.currentThread().getContextClassLoader());
  ContainerConfiguration containerConfiguration =
      new DefaultContainerConfiguration()
          .setClassWorld(classWorld)
          .setRealm(classWorld.getClassRealm("plexus.core"))
          .setClassPathScanning(PlexusConstants.SCANNING_INDEX)
          .setAutoWiring(true)
          .setJSR250Lifecycle(true)
          .setName("linkage-checker");
  try {
    PlexusContainer container = new DefaultPlexusContainer(containerConfiguration);

    MavenExecutionRequest mavenExecutionRequest = new DefaultMavenExecutionRequest();
    ProjectBuildingRequest projectBuildingRequest =
        mavenExecutionRequest.getProjectBuildingRequest();

    projectBuildingRequest.setRepositorySession(session);

    // Profile activation needs properties such as JDK version
    Properties properties = new Properties(); // allowing duplicate entries
    properties.putAll(projectBuildingRequest.getSystemProperties());
    properties.putAll(OsProperties.detectOsProperties());
    properties.putAll(System.getProperties());
    projectBuildingRequest.setSystemProperties(properties);

    ProjectBuilder projectBuilder = container.lookup(ProjectBuilder.class);
    ProjectBuildingResult projectBuildingResult =
        projectBuilder.build(pomFile.toFile(), projectBuildingRequest);
    return projectBuildingResult.getProject();
  } catch (PlexusContainerException | ComponentLookupException | ProjectBuildingException ex) {
    throw new MavenRepositoryException(ex);
  }
}
 

public Model readModel(final Resource resource, final Properties properties) {
	initialize();
	try {
		ProjectBuildingRequest request = getProjectBuildingRequest(properties);
		request.setResolveDependencies(false);
		ProjectBuildingResult result = projectBuilder
				.build(new PropertiesModelSource(properties, resource), request);
		return result.getProject().getModel();
	}
	catch (Exception e) {
		throw new IllegalStateException("Failed to build model from effective pom",
				e);
	}
}
 

private MavenProject loadMavenProject(File pom, String groupId, String artifactId, String version) {
        MavenEmbedder embedder = EmbedderFactory.getProjectEmbedder();
        Artifact projectArtifact = embedder.createArtifact(groupId, artifactId, version,  "jar");
        try {
            ProjectBuildingRequest dpbr = embedder.createMavenExecutionRequest().getProjectBuildingRequest();
            dpbr.setValidationLevel(ModelBuildingRequest.VALIDATION_LEVEL_MINIMAL);
            
            dpbr.setProcessPlugins(false);
            dpbr.setResolveDependencies(true);
            ArrayList<ArtifactRepository> remoteRepos = new ArrayList<ArtifactRepository>();
//for project embedder doens't matter            
//            remoteRepos = RepositoryPreferences.getInstance().remoteRepositories();
            dpbr.setRemoteRepositories(remoteRepos);
            
            ProjectBuildingResult res = embedder.buildProject(projectArtifact, dpbr);
            if (res.getProject() != null) {
                return res.getProject();
            } else {
                LOG.log(Level.INFO, "No project model from repository for {0}: {1}", new Object[] {projectArtifact, res.getProblems()});
            }
        } catch (ProjectBuildingException ex) {
            LOG.log(Level.FINER, "Failed to load project model from repository for {0}: {1}", new Object[] {projectArtifact, ex});
        } catch (Exception exception) {
            LOG.log(Level.FINER, "Failed to load project model from repository for " + projectArtifact, exception);
        }
        return null;
    }
 

private Relocation getRelocation(org.netbeans.modules.maven.model.pom.Dependency d) {
    ProjectBuildingRequest dpbr = EmbedderFactory.getProjectEmbedder().createMavenExecutionRequest().getProjectBuildingRequest();
    dpbr.setValidationLevel(ModelBuildingRequest.VALIDATION_LEVEL_MINIMAL);
    dpbr.setProcessPlugins(false);
    dpbr.setResolveDependencies(false);
    ArrayList<ArtifactRepository> remoteRepos = new ArrayList<>();
    dpbr.setRemoteRepositories(remoteRepos);
    String groupId = d.getGroupId();
    String artifactId = d.getArtifactId();
    String version = d.getVersion();
    if(groupId != null && !"".equals(groupId.trim()) &&
       artifactId != null && !"".equals(artifactId.trim()) &&
       version != null && !"".equals(version.trim())) 
    {           
        MavenEmbedder embedder = EmbedderFactory.getProjectEmbedder();
        Artifact a = embedder.createProjectArtifact(groupId, artifactId, version);
        try {
            ProjectBuildingResult r = embedder.buildProject(a, dpbr);
            DistributionManagement dm = r.getProject().getDistributionManagement();
            return dm != null ? dm.getRelocation() : null;
        } catch (ProjectBuildingException ex) {
            // just log and hope for the best ...
            Logger.getLogger(DependencyNode.class.getName()).log(Level.INFO, version, ex);                
        }
    }
    return null;
}
 

static List<ModelProblem> runMavenValidationImpl(final File pom) {
    //TODO profiles based on current configuration??
    MavenEmbedder embedder = EmbedderFactory.getProjectEmbedder();
    MavenExecutionRequest meReq = embedder.createMavenExecutionRequest();
    ProjectBuildingRequest req = meReq.getProjectBuildingRequest();
    req.setValidationLevel(ModelBuildingRequest.VALIDATION_LEVEL_MAVEN_3_1); // currently enables just <reporting> warning
    req.setLocalRepository(embedder.getLocalRepository());
    List<ArtifactRepository> remoteRepos = RepositoryPreferences.getInstance().remoteRepositories(embedder);
    req.setRemoteRepositories(remoteRepos);
    req.setRepositorySession(((DefaultMaven) embedder.lookupComponent(Maven.class)).newRepositorySession(meReq));
    List<ModelProblem> problems;
    try {
        problems = embedder.lookupComponent(ProjectBuilder.class).build(pom, req).getProblems();
    } catch (ProjectBuildingException x) {
        problems = new ArrayList<ModelProblem>();
        List<ProjectBuildingResult> results = x.getResults();
        if (results != null) { //one code point throwing ProjectBuildingException contains results,
            for (ProjectBuildingResult result : results) {
                problems.addAll(result.getProblems());
            }
        } else {
            // another code point throwing ProjectBuildingException doesn't contain results..
            Throwable cause = x.getCause();
            if (cause instanceof ModelBuildingException) {
                problems.addAll(((ModelBuildingException) cause).getProblems());
            }
        }
    }
    return problems;
}
 

public ProjectBuildingResult buildProject(Artifact art, ProjectBuildingRequest req) throws ProjectBuildingException {
    if (req.getLocalRepository() == null) {
       req.setLocalRepository(getLocalRepository());
    }
    MavenExecutionRequest request = createMavenExecutionRequest();
    req.setProcessPlugins(false);
    req.setRepositorySession(maven.newRepositorySession(request));
    ProjectBuildingResult res = projectBuilder.build(art, req);
    normalizePaths(res.getProject());
    return res;
}
 

private void setResult(ProjectBuildingResult pbr, Map<File, MavenExecutionResult> results) {
    DefaultMavenExecutionResult r = new DefaultMavenExecutionResult();
    normalizePaths(pbr.getProject());
    r.setProject(pbr.getProject());
        r.setDependencyResolutionResult(pbr.getDependencyResolutionResult());
    results.put(pbr.getPomFile(), r);
}
 

static List<ModelProblem> runMavenValidationImpl(final File pom) {
    MavenEmbedder embedder = EmbedderFactory.getProjectEmbedder();
    MavenExecutionRequest meReq = embedder.createMavenExecutionRequest();
    ProjectBuildingRequest req = meReq.getProjectBuildingRequest();
    req.setValidationLevel(ModelBuildingRequest.VALIDATION_LEVEL_MAVEN_3_0); // 3.1 currently enables just <reporting> warning, see issue 223562 for details on why it's bad to show.
    req.setLocalRepository(embedder.getLocalRepository());
    List<ArtifactRepository> remoteRepos = RepositoryPreferences.getInstance().remoteRepositories(embedder);
    req.setRemoteRepositories(remoteRepos);
    req.setRepositorySession(((DefaultMaven) embedder.lookupComponent(Maven.class)).newRepositorySession(meReq));
    List<ModelProblem> problems;
    try {
        problems = embedder.lookupComponent(ProjectBuilder.class).build(pom, req).getProblems();
    } catch (ProjectBuildingException x) {
        problems = new ArrayList<ModelProblem>();
        List<ProjectBuildingResult> results = x.getResults();
        if (results != null) { //one code point throwing ProjectBuildingException contains results,
            for (ProjectBuildingResult result : results) {
                problems.addAll(result.getProblems());
            }
        } else {
            // another code point throwing ProjectBuildingException doesn't contain results..
            Throwable cause = x.getCause();
            if (cause instanceof ModelBuildingException) {
                problems.addAll(((ModelBuildingException) cause).getProblems());
            }
        }
    }
    List<ModelProblem> toRet = new LinkedList<ModelProblem>();
    for (ModelProblem problem : problems) {
        if(ModelUtils.checkByCLIMavenValidationLevel(problem)) {
            toRet.add(problem);
        }
    }
    return toRet;
}
 

public Model readModel(final Resource resource, final Properties properties) {
	initialize();
	try {
		ProjectBuildingRequest request = getProjectBuildingRequest(properties);
		request.setResolveDependencies(false);
		ProjectBuildingResult result = this.projectBuilder
				.build(new PropertiesModelSource(properties, resource), request);
		return result.getProject().getModel();
	}
	catch (Exception e) {
		throw new IllegalStateException("Failed to build model from effective pom",
				e);
	}
}
 

/**
 * Finds the local root of the specified project.
 *
 * @param project The project to find the local root for.
 * @return The local root project (this may be the current project)
 */
private MavenProject getLocalRoot( final MavenProject project ) throws IOException
{
    MavenProject currentProject = project;
    MavenProject localRootProject = project;

    List<File> parentDirs = new ArrayList<>();
    getAllParentDirectories( project.getBasedir(), parentDirs );

    for (File parentDir : parentDirs) {
        getLog().debug( "Checking to see if " + parentDir + " is an aggregator parent" );
        File parent = new File( parentDir, "pom.xml" );
        if ( parent.isFile() )
        {
            try
            {
                final ProjectBuildingResult result = projectBuilder.build( parent, session.getProjectBuildingRequest() );
                final MavenProject parentProject = result.getProject();
                final String currentProjectCanonicalPath = currentProject.getBasedir().getCanonicalPath();
                if ( getAllChildModules( parentProject ).contains( currentProjectCanonicalPath ) )
                {
                    getLog().debug( parentDir + " is an aggregator parent of current project " );
                    localRootProject = parentProject;
                    currentProject = parentProject;
                }
                else
                {
                    getLog().debug( parentDir + " is not an aggregator parent of current project ("+getAllChildModules( parentProject )+"/"+currentProjectCanonicalPath+") " );
                }
            }
            catch ( ProjectBuildingException e )
            {
                getLog().warn( e );
            }
        }
    }

    getLog().debug( "Local aggregation root is " + localRootProject.getBasedir() );
    return localRootProject;
}
 

private String findProvidedDependencyVersion(final Set<Artifact> artifacts, final String groupId, final String artifactId) {
    final ProjectBuildingRequest projectRequest = new DefaultProjectBuildingRequest();
    projectRequest.setRepositorySession(repoSession);
    projectRequest.setSystemProperties(System.getProperties());
    projectRequest.setLocalRepository(localRepo);

    for (final Artifact artifact : artifacts) {
        final Set<Artifact> artifactDependencies = new HashSet<>();
        try {
            final ProjectBuildingResult projectResult = projectBuilder.build(artifact, projectRequest);
            gatherArtifacts(projectResult.getProject(), artifactDependencies);
            getLog().debug("For Artifact " + artifact + ", found the following dependencies:");
            artifactDependencies.forEach(dep -> getLog().debug(dep.toString()));

            for (final Artifact dependency : artifactDependencies) {
                if (dependency.getGroupId().equals(groupId) && dependency.getArtifactId().equals(artifactId)) {
                    getLog().debug("Found version of " + groupId + ":" + artifactId + " to be " + artifact.getVersion());
                    return artifact.getVersion();
                }
            }
        } catch (final Exception e) {
            getLog().warn("Unable to construct Maven Project for " + artifact + " when attempting to determine the expected version of NiFi API");
            getLog().debug("Unable to construct Maven Project for " + artifact + " when attempting to determine the expected version of NiFi API", e);
        }
    }

    return null;
}
 

/**
 * Reloads project info from file
 * 
 * @param project
 * @return
 * @throws MojoFailureException
 */
private MavenProject reloadProject(MavenProject project) throws MojoFailureException {
    try {
    	ProjectBuildingResult result = projectBuilder.build(project.getFile(), mavenSession.getProjectBuildingRequest());
    	return result.getProject();
    } catch (Exception e) {
        throw new MojoFailureException("Error re-loading project info", e);
    }
}
 

@Override
public void execute() throws MojoExecutionException, MojoFailureException {
    try {
        // find the nar dependency
        Artifact narArtifact = null;
        for (final Artifact artifact : project.getDependencyArtifacts()) {
            if (NAR.equals(artifact.getType())) {
                // ensure the project doesn't have two nar dependencies
                if (narArtifact != null) {
                    throw new MojoExecutionException("Project can only have one NAR dependency.");
                }

                // record the nar dependency
                narArtifact = artifact;
            }
        }

        // ensure there is a nar dependency
        if (narArtifact == null) {
            throw new MojoExecutionException("Project does not have any NAR dependencies.");
        }

        // build the project for the nar artifact
        final ProjectBuildingRequest narRequest = new DefaultProjectBuildingRequest();
        narRequest.setRepositorySession(repoSession);
        narRequest.setSystemProperties(System.getProperties());

        final ProjectBuildingResult narResult = projectBuilder.build(narArtifact, narRequest);
        narRequest.setProject(narResult.getProject());

        // get the artifact handler for excluding dependencies
        final ArtifactHandler narHandler = excludesDependencies(narArtifact);
        narArtifact.setArtifactHandler(narHandler);

        // nar artifacts by nature includes dependencies, however this prevents the
        // transitive dependencies from printing using tools like dependency:tree.
        // here we are overriding the artifact handler for all nars so the
        // dependencies can be listed. this is important because nar dependencies
        // will be used as the parent classloader for this nar and seeing what
        // dependencies are provided is critical.
        final Map<String, ArtifactHandler> narHandlerMap = new HashMap<>();
        narHandlerMap.put(NAR, narHandler);
        artifactHandlerManager.addHandlers(narHandlerMap);

        // get the dependency tree
        final DependencyNode root = dependencyGraphBuilder.buildDependencyGraph(narRequest, null);

        // write the appropriate output
        DependencyNodeVisitor visitor = null;
        if ("tree".equals(mode)) {
            visitor = new TreeWriter();
        } else if ("pom".equals(mode)) {
            visitor = new PomWriter();
        }

        // ensure the mode was specified correctly
        if (visitor == null) {
            throw new MojoExecutionException("The specified mode is invalid. Supported options are 'tree' and 'pom'.");
        }

        // visit and print the results
        root.accept(visitor);
        getLog().info("--- Provided NAR Dependencies ---\n\n" + visitor.toString());
    } catch (ProjectBuildingException | DependencyGraphBuilderException e) {
        throw new MojoExecutionException("Cannot build project dependency tree", e);
    }
}