InternalSession session = InternalSession.from(request.getSession());
        try {
            InstallRequest installRequest =
                    new InstallRequest().setArtifacts(session.toArtifacts(request.getArtifacts()));

            InstallResult result = repositorySystem.install(session.getSession(), installRequest);
        } catch (InstallationException e) {

        Collection<Artifact> artifacts = nonNull(request.getArtifacts(), "request.artifacts");
        RemoteRepository repository = nonNull(request.getRepository(), "request.repository");
        try {
            DeployRequest deployRequest = new DeployRequest()
                    .setRepository(session.toRepository(repository))
                    .setArtifacts(session.toArtifacts(artifacts));

    int SELECT_VERSION_FROM_RANGE = 10;

    int RESTRICT_RANGE = 11;

    int MANAGE_ARTIFACT_VERSION = 12;

    int MANAGE_ARTIFACT_SCOPE = 13;

    int MANAGE_ARTIFACT_SYSTEM_PATH = 14;

    void testArtifact(Artifact node);

    void startProcessChildren(Artifact artifact);

    void endProcessChildren(Artifact artifact);

    void includeArtifact(Artifact artifact);

     * }
     * </pre>
     *
     * @param sources The set of artifacts for this publication.
     */
    void setArtifacts(Iterable<?> sources);

    /**
     * Returns the complete set of artifacts for this publication.
     * @return the artifacts.
     */
    MavenArtifactSet getArtifacts();

    /**
     * Returns the groupId for this publication.
     */
    String getGroupId();

    /**

            setDependencyArtifacts(Collections.unmodifiableSet(project.getDependencyArtifacts()));
        }

        if (project.getArtifacts() != null) {
            setArtifacts(Collections.unmodifiableSet(project.getArtifacts()));
        }

        if (project.getParentFile() != null) {
            parentFile = new File(project.getParentFile().getAbsolutePath());
        }

            Artifact replacement,
            VersionRange newRange) {
        for (ResolutionListener listener : listeners) {
            switch (event) {
                case ResolutionListener.TEST_ARTIFACT:
                    listener.testArtifact(node.getArtifact());
                    break;
                case ResolutionListener.PROCESS_CHILDREN:
                    listener.startProcessChildren(node.getArtifact());

     * like {@code maven-project}.
     *
     * @return The plugin artifacts, never {@code null}.
     */
    public List<Artifact> getArtifacts() {
        return artifacts;
    }

    public void setArtifacts(List<Artifact> artifacts) {
        this.artifacts = artifacts;

        // clear the calculated artifactMap
        artifactMap = null;
    }

    @Test
    void testShouldExtractPluginArtifacts() throws Exception {
        PluginDescriptor pd = new PluginDescriptor();

        Artifact artifact = createArtifact("testGroup", "testArtifact", "1.0");

        pd.setArtifacts(Collections.singletonList(artifact));

        ExpressionEvaluator ee = createExpressionEvaluator(createDefaultProject(), pd, new Properties());

     * </pre>
     *
     * @return the artifacts.
     */
    IvyArtifactSet getArtifacts();

    /**
     * Sets the artifacts for this publication. Each supplied value is interpreted as per {@link #artifact(Object)}.
     *
     * @param sources The set of artifacts for this publication.
     */
    void setArtifacts(Iterable<?> sources);

    /**
     * Returns the organisation for this publication.

            artifacts = new LinkedHashSet<>();
        }

        artifacts.add(artifact);
    }

    public Set<Artifact> getArtifacts() {
        if (artifacts == null) {
            artifacts = new LinkedHashSet<>();
        }

        return artifacts;
    }

    public void setArtifacts(Set<Artifact> artifacts) {
        this.artifacts = artifacts;
    }