* @return the phase
     */
    @Nonnull
    String phase() default "";

    /**
     * Goal to fork. Note that specifying a phase overrides specifying a goal. The specified <code>goal</code> must be
     * another goal of the same plugin.
     * @return the goal
     */
    @Nonnull
    String goal() default "";

    /**

        this.since = since;
    }

    /**
     * @return The goal name of the Mojo
     */
    public String getGoal() {
        return goal;
    }

    /**
     * @param goal The new goal name of the Mojo
     */
    public void setGoal(String goal) {
        this.goal = goal;
    }

    /**
     * @return the invocation phase of the Mojo
     */

 */
public class PluginManagerException extends Exception {

    private final String pluginGroupId;

    private final String pluginArtifactId;

    private final String pluginVersion;

    private String goal;

    private MavenProject project;

    protected PluginManagerException(Plugin plugin, String message, MavenProject project, Throwable cause) {
        super(message, cause);

        this.project = project;

     */
    private Map<String, List<MojoExecution>> forkedExecutions = new LinkedHashMap<>();

    public MojoExecution(Plugin plugin, String goal, String executionId) {
        this.plugin = plugin;
        this.goal = goal;
        this.executionId = executionId;
    }

    public MojoExecution(MojoDescriptor mojoDescriptor) {
        this.mojoDescriptor = mojoDescriptor;

  <version>2.3-SNAPSHOT</version>
  <goalPrefix>jar</goalPrefix>
  <isolatedRealm>false</isolatedRealm>
  <inheritedByDefault>true</inheritedByDefault>
  <mojos>
    <mojo>
      <goal>jar</goal>
      <description>mojo-description</description>
      <requiresDependencyResolution>runtime</requiresDependencyResolution>
      <requiresDependencyCollection>test</requiresDependencyCollection>

 *      <td>execute</td>
 *      <td>@Execute
 *       ( phase=LifecyclePhase.&lt;phase&gt;, goal= "&lt;goal-name&gt;", lifecycle="&lt;lifecycle-id&gt;" )</td>
 *      <td>No</td>
 *      <td>When this goal is invoked, it will first invoke a parallel lifecycle, ending at the given phase.
 *          If a goal is provided instead of a phase, that goal will be executed in isolation.

 */
public class DuplicateMojoDescriptorException extends InvalidPluginDescriptorException {

    public DuplicateMojoDescriptorException(
            String goalPrefix, String goal, String existingImplementation, String newImplementation) {
        super("Goal: " + goal + " already exists in the plugin descriptor for prefix: " + goalPrefix
                + System.lineSeparator() + "Existing implementation is: " + existingImplementation

                    for (String goal : execution.getGoals()) {
                        MojoDescriptor forkedMojoDescriptor;

                        if (goal.indexOf(':') < 0) {
                            forkedMojoDescriptor = pluginDescriptor.getMojo(goal);
                            if (forkedMojoDescriptor == null) {
                                throw new MojoNotFoundException(goal, pluginDescriptor);

    private static final String LS = System.lineSeparator();

    @Test
    void testMissingRequiredStringArrayTypeParameter() {
        MojoDescriptor mojoDescriptor = new MojoDescriptor();
        mojoDescriptor.setGoal("goal");
        PluginDescriptor pluginDescriptor = new PluginDescriptor();
        pluginDescriptor.setGoalPrefix("goalPrefix");
        pluginDescriptor.setArtifactId("artifactId");

initialize them, you must run:

    git submodule init
    git submodule update

TODO
----

 * Add maven goal to avoid manual call to git submodule init.
 * Make hpack-test-case update itself from git, and run new tests.
 * Add maven goal to generate stories and a pull request to hpack-test-case
   to have others validate our output.