sb.append(" -Dversion=");
            sb.append(version);

            // insert classifier only if it was used in the artifact
            if (classifier != null && !classifier.equals("")) {
                sb.append(" -Dclassifier=");
                sb.append(classifier);
            }
            sb.append(" -Dpackaging=");
            sb.append(type);

        String classifier = artifact.getClassifier();
        if (Features.consumerPom(session.getUserProperties())) {
            if ("pom".equals(extension)) {
                if (classifier == null || classifier.isEmpty()) {
                    classifier = "build";
                } else if (classifier.equals("consumer")) {
                    classifier = null;
                }
            }

        this.scope = scope;

        this.type = type;

        if (classifier == null) {
            classifier = artifactHandler.getClassifier();
        }

        this.classifier = classifier;

        this.optional = optional;

        validateIdentity();
    }

    private void validateIdentity() {
        if (empty(groupId)) {
            throw new InvalidArtifactRTException(

        private String extension;

        private String classifier;

        public Artifact(String groupId, String artifactId, String version, String extension, String classifier) {
            this.groupId = groupId;
            this.artifactId = artifactId;
            this.version = version;
            this.extension = extension;
            this.classifier = classifier;
        }

        public String getGroupId() {

                        && srcInfo.repository != dstInfo.repository)) {
            infos.put(dstKey, srcInfo);
        }
    }

    private String getKey(String classifier, String extension) {
        return (classifier == null ? "" : classifier.trim()) + ':' + (extension == null ? "" : extension.trim());
    }

    private ArtifactRepository getRepository(

      <fields>
        <field>
          <name>classifier</name>
          <version>1.1.0+</version>
          <type>String</type>
          <description>The classifier of the sub-artifact. Each classifier and extension pair may only appear once.</description>
          <defaultValue></defaultValue>
          <identifier>true</identifier>

     * @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

    <dependency>
      <groupId>org.eclipse.sisu</groupId>
      <artifactId>org.eclipse.sisu.inject</artifactId>
      <classifier>no_asm</classifier>
    </dependency>
    <dependency>
      <groupId>com.google.inject</groupId>
      <artifactId>guice</artifactId>
      <classifier>classes</classifier>
    </dependency>
    <dependency>
      <groupId>org.ow2.asm</groupId>
      <artifactId>asm</artifactId>

            String groupId,
            String artifactId,
            VersionRange versionRange,
            String type,
            String classifier,
            String scope,
            boolean optional) {
        return createArtifactX(groupId, artifactId, versionRange, type, classifier, scope, null, optional);
    }

    private Artifact createProjectArtifactX(String groupId, String artifactId, String version) {

    }

    @Override
    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));
    }

    @Override
    public ArtifactRepository createDefaultLocalRepository() throws InvalidRepositoryException {