}
        }

        if ("i".equals(artifact.getArtifactId())) {
            Artifact a = null;
            try {
                a = factory.createBuildArtifact("org.apache.maven", "j", "1.0-SNAPSHOT", "jar");
                dependencies.add(a);
            } catch (Exception e) {
                throw new ArtifactMetadataRetrievalException("Error retrieving metadata", e, a);
            }
        }

  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-api</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-api-model</artifactId>

  <name>Maven 4 API :: Model</name>
  <description>Maven 4 API - Immutable Model for Maven POM (Project Object Model).</description>

  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-api</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-api-settings</artifactId>

  <name>Maven 4 API :: Settings</name>
  <description>Maven 4 API - Immutable Settings model.</description>

  <dependencies>

  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-api</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-api-toolchain</artifactId>

  <name>Maven 4 API :: Toolchain</name>
  <description>Maven 4 API - Immutable Toolchain model.</description>

  <dependencies>

  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-api</artifactId>
  <packaging>pom</packaging>
  <name>Maven 4 API</name>

     */
    @Nonnull
    VersionConstraint parseVersionConstraint(@Nonnull String constraint);

    /**
     * Checks whether a given artifact version is considered a {@code SNAPSHOT} or not.
     */
    boolean isSnapshot(@Nonnull String version);

            }
        }

        if ("i".equals(artifact.getArtifactId())) {
            Artifact a = null;
            try {
                a = factory.createBuildArtifact("org.apache.maven", "j", "1.0-SNAPSHOT", "jar");
                dependencies.add(a);
            } catch (Exception e) {
                throw new ArtifactMetadataRetrievalException("Error retrieving metadata", e, a);
            }
        }

        return false;
    }

    @Override
    public int getNature() {
        if (artifact.getVersion() != null) {
            return artifact.isSnapshot() ? SNAPSHOT : RELEASE;
        }

        VersionRange range = artifact.getVersionRange();
        if (range != null) {
            for (Restriction restriction : range.getRestrictions()) {

  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-api</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-api-plugin</artifactId>

  <name>Maven 4 API :: Plugin</name>
  <description>Maven 4 API - Immutable Plugin model.</description>

  <dependencies>
    <dependency>

    @Deprecated(since = "4.0.0")
    String RELEASE_VERSION = "RELEASE";

    @Deprecated(since = "4.0.0")
    String LATEST_VERSION = "LATEST";

    String SNAPSHOT_VERSION = "SNAPSHOT";

    Pattern VERSION_FILE_PATTERN = Pattern.compile("^(.*)-(\\d{8}\\.\\d{6})-(\\d+)$");

    // TODO into artifactScope handler

    String SCOPE_COMPILE = "compile";