final GoalTask goalTask1 = new GoalTask("compiler:compile");
        final GoalTask goalTask2 = new GoalTask("surefire:test");
        final TaskSegment taskSegment1 = new TaskSegment(false, goalTask1, goalTask2);
        final MavenSession session1 = ProjectDependencyGraphStub.getMavenSession(ProjectDependencyGraphStub.A);

        TaskSegment taskSegment = projectBuildList.get(0).getTaskSegment();
        assertTrue(
                projectBuildList.size() >= 6,
                "Expected size " + projectBuildList.size() + " to be >= 6 for collection: " + projectBuildList);

        final ProjectBuildList byTaskSegment = projectBuildList.getByTaskSegment(taskSegment);

    private final MavenProject project;

    private final TaskSegment taskSegment;

    private final MavenSession session;

    private final List<MavenProject> nonTransitiveUpstreamProjects;

    private final List<MavenProject> transitiveUpstreamProjects;

    public ProjectSegment(MavenProject project, TaskSegment taskSegment, MavenSession copiedSession) {
        this.project = project;

            ReactorContext reactorContext,
            ProjectBuildList projectBuilds,
            List<TaskSegment> taskSegments,
            ReactorBuildStatus reactorBuildStatus) {
        for (TaskSegment taskSegment : taskSegments) {
            for (ProjectSegment projectBuild : projectBuilds.getByTaskSegment(taskSegment)) {
                try {
                    lifecycleModuleBuilder.buildProject(

    public ProjectBuildList calculateProjectBuilds(MavenSession session, List<TaskSegment> taskSegments) {
        List<ProjectSegment> projectBuilds = new ArrayList<>();

        MavenProject rootProject = session.getTopLevelProject();

        for (TaskSegment taskSegment : taskSegments) {
            List<MavenProject> projects;

            if (taskSegment.isAggregating()) {
                projects = Collections.singletonList(rootProject);

 * </p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
public interface LifecycleTaskSegmentCalculator {
    List<TaskSegment> calculateTaskSegments(MavenSession session)
            throws PluginNotFoundException, PluginResolutionException, PluginDescriptorParsingException,

            for (TaskSegment taskSegment : taskSegments) {
                Map<MavenProject, List<MavenProject>> projects = taskSegment.isAggregating()
                        ? Collections.singletonMap(rootProject, allProjects.get(rootProject))
                        : allProjects;

                BuildPlan segment = calculateMojoExecutions(projects, taskSegment.getTasks());
                plan.then(segment);

        List<TaskSegment> taskSegments =
                lifeCycleTaskSegmentCalculator.calculateTaskSegments(session, Arrays.asList(tasks));

        TaskSegment mergedSegment = new TaskSegment(false);

        for (TaskSegment taskSegment : taskSegments) {
            mergedSegment.getTasks().addAll(taskSegment.getTasks());
        }

import org.apache.maven.lifecycle.internal.ProjectBuildList;
import org.apache.maven.lifecycle.internal.ReactorBuildStatus;
import org.apache.maven.lifecycle.internal.ReactorContext;
import org.apache.maven.lifecycle.internal.TaskSegment;

/**
 * <p>
 * A {@link Builder} encapsulates a strategy for building a set of Maven projects. The default strategy in Maven builds

        this.eventCatapult = eventCatapult;
        this.logger = logger;
    }

    public MavenExecutionPlan resolveBuildPlan(
            MavenSession session, MavenProject project, TaskSegment taskSegment, Set<Artifact> projectArtifacts)
            throws PluginNotFoundException, PluginResolutionException, LifecyclePhaseNotFoundException,