}

        return pomArtifact;
    }

    /**
     * Creates POM artifact out of passed in artifact by dropping classifier (if exists) and rewriting extension to
     * "pom". Unconditionally, unlike {@link #toPomArtifact(Artifact)} that does this only for artifacts without
     * classifiers.
     *
     * @since 4.0.0
     */
    public static Artifact toPomArtifactUnconditionally(Artifact artifact) {

        this.extension = extension;
    }

    @Override
    public String getClassifier() {
        return classifier;
    }

    public void setClassifier(final String classifier) {
        this.classifier = classifier;
    }

    @Override
    public String getDirectory() {
        if (directory == null) {
            return getPackaging() + "s";
        }

        String classifier = artifact.getClassifier();
        String extension = artifact.getExtension();
        Path repo = getProjectLocalRepo();
        return repo.resolve(groupId)
                .resolve(artifactId)
                .resolve(version)
                .resolve(artifactId
                        + "-" + version

    public static Object getKey(Artifact artifact) {
        return artifact.getGroupId() + ':' + artifact.getArtifactId() + ':' + artifact.getBaseVersion();
    }

    protected String getKey(String classifier, String extension) {
        return classifier + ':' + extension;
    }

    @Override
    public String getGroupId() {
        return metadata.getGroupId();
    }

    @Override
    public String getArtifactId() {

  define for each {{{../maven-model/maven.html#class_dependency}dependency type}} information on the artifact
  (classifier, extension, language) and how to manage it as dependency (add to classpath, include dependencies).

     * @param artifactId the artifact identifier, or {@code null} is unspecified
     * @param version the artifact version, or {@code null} is unspecified
     * @param classifier the artifact classifier, or {@code null} is unspecified
     * @param extension the artifact extension, or {@code null} is unspecified
     * @param type the artifact type, or {@code null} is unspecified

                break;
            default:
                throw new IllegalArgumentException("Bad artifact coordinates " + coord
                        + ", expected format is <groupId>:<artifactId>[:<extension>[:<classifier>]]:<version>");
        }
        return s;
    }

    }

    public Artifact createArtifactWithClassifier(
            String groupId, String artifactId, String version, String type, String classifier) {
        return new DefaultArtifact(groupId, artifactId, version, null, type, classifier, new TestArtifactHandler(type));
    }

    public ArtifactRepository createDefaultLocalRepository() throws InvalidRepositoryException {
        return createLocalRepository(

          <type>String</type>
          <defaultValue>jar</defaultValue>
        </field>
        <field>
          <name>classifier</name>
          <version>4.0.0+</version>
          <description>
            <![CDATA[
            The classifier of the dependency. It is appended to
            the filename after the version. This allows:
            <ul>

    private final String extension;
    private final String classifier;
    private final boolean includesDependencies;
    private final Set<PathType> pathTypes;
    private final Map<String, String> properties;

    public DefaultType(
            String id,
            Language language,
            String extension,
            String classifier,
            boolean includesDependencies,