GavCacheKey(String groupId, String artifactId, String version, String tag) {
            this(gav(groupId, artifactId, version), tag);
        }

        GavCacheKey(String gav, String tag) {
            this.gav = gav;
            this.tag = tag;
            this.hash = Objects.hash(gav, tag);
        }

        private static String gav(String groupId, String artifactId, String version) {

    public InvalidArtifactRTException(String groupId, String artifactId, String version, String type, String message) {
        this.groupId = groupId;
        this.artifactId = artifactId;
        this.version = version;
        this.type = type;
        this.baseMessage = message;
    }

    public InvalidArtifactRTException(
            String groupId, String artifactId, String version, String type, String message, Throwable cause) {

     */
    Model getRawModel(Path from, Path pomFile);

    /**
     * Get the model from the reactor based on the groupId and artifactId when resolving reactor dependencies.
     *
     * @param from    the requiring model
     * @param groupId    the groupId
     * @param artifactId the artifactId
     * @return the model, otherwise {@code null}
     * @throws IllegalStateException if multiple versions of the same GA are part of the reactor

        if (p.length == 3) {
            // <groupId>:<artifactId>:<goal>
            gs.groupId = p[0];
            gs.artifactId = p[1];
            gs.goal = p[2];
        } else if (p.length == 4) {
            // <groupId>:<artifactId>:<version>:<goal>
            gs.groupId = p[0];
            gs.artifactId = p[1];
            gs.version = p[2];
            gs.goal = p[3];
        } else {

import org.apache.maven.artifact.versioning.OverConstrainedVersionException;
import org.apache.maven.artifact.versioning.VersionRange;

/**
 * Maven Artifact interface. Notice that it mixes artifact definition concepts (groupId, artifactId, version)
 * with dependency information (version range, scope).
 */
public interface Artifact extends Comparable<Artifact> {

    String RELEASE_VERSION = "RELEASE";

            return addDependency(groupId, artifactId, version, scope, (Exclusion) null);
        }

        public ProjectBuilder addDependency(
                String groupId, String artifactId, String version, String scope, Exclusion exclusion) {
            return addDependency(groupId, artifactId, version, scope, null, exclusion);
        }

     * @param artifactId The artifact id, may be {@code null}.
     * @param version The version, may be {@code null}.
     * @return The user-friendly artifact id, never {@code null}.
     */
    static String toId(String groupId, String artifactId, String version) {
        return ((groupId != null && !groupId.isEmpty()) ? groupId : "[unknown-group-id]")
                + ':'

 * but the version may be specified as a range instead of an exact version.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface ArtifactCoordinate {

    /**
     * The groupId of the artifact.
     *
     * @return the groupId
     */
    @Nonnull
    String getGroupId();

    /**
     * The artifactId of the artifact.
     *

import static java.util.stream.Collectors.toMap;

/**
 * Provides information about artifacts (identified by groupId:artifactId string key) and classpath elements exported by
 * Maven core itself and loaded Maven core extensions.
 *
 * @since 3.3.0
 */
public class CoreExports {
    private final Set<String> artifacts;

    private final Map<String, ClassLoader> packages;

    public ProjectSorter(Collection<MavenProject> projects) throws CycleDetectedException, DuplicateProjectException {
        graph = new Graph();

        // groupId:artifactId:version -> project
        projectMap = new HashMap<>(projects.size() * 2);

        // groupId:artifactId -> (version -> vertex)
        Map<String, Map<String, Vertex>> vertexMap = new HashMap<>(projects.size() * 2);

        for (MavenProject project : projects) {