import java.util.List;

import org.apache.maven.project.MavenProject;

/**
 * Describes the interdependencies between projects in the reactor.
 *
 * @since 3.0-alpha
 */
public interface ProjectDependencyGraph {

    /**
     * Gets all collected projects.
     *
     * @return All collected projects.
     *
     * @since 3.5.0
     */
    List<MavenProject> getAllProjects();

    /**

        if (activeProjects.size() != projectDependencyGraph.getSortedProjects().size()) {
            projectDependencyGraph = new FilteredProjectDependencyGraph(projectDependencyGraph, activeProjects);
        }

        return Result.success(projectDependencyGraph);
    }

    private List<MavenProject> trimProjectsToRequest(

import java.util.concurrent.ConcurrentHashMap;

import org.apache.maven.execution.ProjectDependencyGraph;
import org.apache.maven.project.MavenProject;

/**
 * Provides a sub view of another dependency graph.
 *
 */
class FilteredProjectDependencyGraph implements ProjectDependencyGraph {

    private final ProjectDependencyGraph projectDependencyGraph;

    private final Map<MavenProject, ?> whiteList;

    }

    public ProjectDependencyGraph getProjectDependencyGraph() {
        return projectDependencyGraph;
    }

    public void setProjectDependencyGraph(ProjectDependencyGraph projectDependencyGraph) {
        this.projectDependencyGraph = projectDependencyGraph;
    }

    public String getReactorFailureBehavior() {

            }
        }

        if (!graphResult.hasErrors()) {
            ProjectDependencyGraph projectDependencyGraph = graphResult.get();
            session.setProjects(projectDependencyGraph.getSortedProjects());
            session.setAllProjects(projectDependencyGraph.getAllProjects());
            session.setProjectDependencyGraph(projectDependencyGraph);
        }

        return graphResult;
    }

    @Deprecated

 *
 * @since 4.0.0
 */
public class SmartProjectComparator {

    private final ProjectDependencyGraph dependencyGraph;
    private final Map<MavenProject, Long> projectWeights;
    private final Comparator<MavenProject> comparator;

    public SmartProjectComparator(ProjectDependencyGraph dependencyGraph) {
        this.dependencyGraph = dependencyGraph;
        this.projectWeights = new ConcurrentHashMap<>();

import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.stream.Collectors;

import org.apache.maven.execution.ProjectDependencyGraph;
import org.apache.maven.project.CycleDetectedException;
import org.apache.maven.project.DuplicateProjectException;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectSorter;

/**

 * under the License.
 */
package org.apache.maven.lifecycle.internal;

import java.util.List;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.execution.ProjectDependencyGraph;
import org.apache.maven.project.MavenProject;

/**
 * A build context that matches a Maven project to a given task segment, and the session to be used.
 * <p>
 * A note to the reader;
 * </p>
 * <p>

import org.apache.maven.execution.ExecutionEvent;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.execution.ProjectDependencyGraph;
import org.apache.maven.execution.ProjectExecutionEvent;
import org.apache.maven.execution.ProjectExecutionListener;
import org.apache.maven.impl.util.PhasingExecutor;