/**
     * Set the artifact ID of the extension.
     *
     * @param artifactId a artifactId object.
     */
    public void setArtifactId(String artifactId) {
        this.artifactId = artifactId;
    } // -- void setArtifactId( String )

    /**
     * Set the class loading strategy: 'self-first' (the default),
     * 'parent-first' (loads classes from the parent, then from the

        assertEquals(0, dm.getDependencies().size());
        dm.addDependency(d1);
        assertNotNull(dm.getDependencies());
        assertEquals(1, dm.getDependencies().size());
        dm.getDependencies().get(0).setArtifactId("myArtifactId");
        assertEquals("myArtifactId", dm.getDependencies().get(0).getArtifactId());
        dm.setDependencies(null);
        assertNotNull(dm.getDependencies());

    @Override
    public void setGroupId(String groupId) {
        artifact.setGroupId(groupId);
    }

    /** {@inheritDoc} */
    @Override
    public void setArtifactId(String artifactId) {
        artifact.setArtifactId(artifactId);
    }

    /** {@inheritDoc} */
    @Override
    public boolean isSnapshot() {
        return artifact.isSnapshot();
    }

    /** {@inheritDoc} */

    public PluginDescriptor() {}

    public PluginDescriptor(PluginDescriptor original) {
        this.setGroupId(original.getGroupId());
        this.setArtifactId(original.getArtifactId());
        this.setVersion(original.getVersion());
        this.setGoalPrefix(original.getGoalPrefix());
        this.setInheritedByDefault(original.isInheritedByDefault());

        setBaseVersionInternal(version);
    }

    @Override
    public void setGroupId(String groupId) {
        this.groupId = groupId;
    }

    @Override
    public void setArtifactId(String artifactId) {
        this.artifactId = artifactId;
    }

    @Override
    public boolean isSnapshot() {
        return getBaseVersion() != null

        try {
            PluginPrefixResult result = pluginPrefixResolver.resolve(request);

            Plugin plugin = new Plugin();
            plugin.setGroupId(result.getGroupId());
            plugin.setArtifactId(result.getArtifactId());

            return plugin;
        } catch (NoPluginFoundForPrefixException e) {
            return null;
        }
    }

    @Override

                cause);
        // Convert to old type
        CoreExtension oldExtension = new CoreExtension();
        oldExtension.setGroupId(extension.getGroupId());
        oldExtension.setArtifactId(extension.getArtifactId());
        oldExtension.setVersion(extension.getVersion());
        if (extension.getClassLoadingStrategy() != null) {
            oldExtension.setClassLoadingStrategy(extension.getClassLoadingStrategy());

                found = true;
            }
        }
        if (!found) {
            Plugin plugin = new Plugin();
            plugin.setPrefix(goalPrefix);
            plugin.setArtifactId(artifactId);
            plugin.setName(name);

            getMetadata().addPlugin(plugin);
        }
    }

    @Override
    public Object getKey() {
        return groupId;
    }

        return plugins;
    }

    private Plugin newPlugin(String artifactId, String... goals) {
        Plugin plugin = new Plugin();

        plugin.setGroupId("org.apache.maven.plugins");
        plugin.setArtifactId(artifactId);

        for (String goal : goals) {
            PluginExecution pluginExecution = new PluginExecution();
            pluginExecution.setId("default-" + goal);
            pluginExecution.addGoal(goal);

    }

    protected static Metadata createMetadata(Artifact artifact, Versioning versioning) {
        Metadata metadata = new Metadata();
        metadata.setGroupId(artifact.getGroupId());
        metadata.setArtifactId(artifact.getArtifactId());
        metadata.setVersion(artifact.getVersion());
        metadata.setVersioning(versioning);
        return metadata;
    }