assertEquals(1, pex.getResults().size());
        assertNotNull(pex.getResults().get(0).getPomFile());
        assertThat(pex.getResults().get(0).getProblems().size(), greaterThan(0));
        assertThat(
                pex.getResults(),
                contains(projectBuildingResultWithProblemMessage(

     *         {@code null}.
     * @throws ProjectBuildingException If an error was encountered during building of any project.
     *             {@link ProjectBuildingException#getResults()} provides access to the details of the problems.
     */
    List<ProjectBuildingResult> build(List<File> pomFiles, boolean recursive, ProjectBuildingRequest request)
            throws ProjectBuildingException;

                localProject = pomResult.getRepository() instanceof WorkspaceRepository;
            } catch (org.eclipse.aether.resolution.ArtifactResolutionException e) {
                if (e.getResults().get(0).isMissing() && allowStubModel) {
                    return build(null, createStubModelSource(artifact));
                }
                throw new ProjectBuildingException(

            result.setDependencyGraph(node);
        } catch (DependencyCollectionException e) {
            result.setDependencyGraph(e.getResult().getRoot());
            result.setCollectionErrors(e.getResult().getExceptions());

            throw new DependencyResolutionException(
                    result, "Could not resolve dependencies for project " + project.getId() + ": " + e.getMessage(), e);

            validateOptionalProjects(request, session);
            validateOptionalProfiles(session, request.getProfileActivation());

            if (session.getResult().hasExceptions()) {
                addExceptionToResult(result, session.getResult().getExceptions().get(0));
                persistResumptionData(result, session);
                return result;
            } else {

        this.reactorBuildStatus = reactorBuildStatus;
    }

    public ReactorBuildStatus getReactorBuildStatus() {
        return reactorBuildStatus;
    }

    public MavenExecutionResult getResult() {
        return result;
    }

    public ClassLoader getOriginalContextClassLoader() {
        return originalContextClassLoader;
    }

        return artifacts.iterator();
    }

    @Override
    public int size() {
        return artifacts.size();
    }

    @Override
    public DependencyResolutionResult getResult() {
        return result;
    }

        eventCatapult.fire(ExecutionEvent.Type.SessionStarted, session, null);

        ReactorContext reactorContext = null;
        ProjectBuildList projectBuilds = null;
        MavenExecutionResult result = session.getResult();

        try {
            if (buildExecutionRequiresProject(session) && projectIsNotPresent(session)) {
                throw new MissingProjectException("The goal you specified requires a project to execute"

        if (resolvedArtifacts instanceof ProjectArtifactsCache.ArtifactsSetWithResult) {
            return ((ProjectArtifactsCache.ArtifactsSetWithResult) resolvedArtifacts).getResult();
        } else {
            throw new IllegalStateException();
        }
    }

    public Set<Artifact> resolveProjectArtifacts(
            MavenProject project,

    /**
     * A cache key.
     */
    interface Key {
        // marker interface for cache keys
    }

    interface ArtifactsSetWithResult extends Set<Artifact> {
        DependencyResolutionResult getResult();
    }

    /**
     * CacheRecord
     */
    class CacheRecord {

        private final Set<Artifact> artifacts;

        private final LifecycleExecutionException exception;