Xpp3Dom pluginConfiguration = (Xpp3Dom) plugin.getConfiguration();

            if (pluginConfiguration != null) {
                for (PluginExecution execution : plugin.getExecutions()) {
                    Xpp3Dom executionConfiguration = (Xpp3Dom) execution.getConfiguration();

                    executionConfiguration =

            }

            jtc.addProvideToken(key, matcher);
        }

        // populate the configuration section
        Xpp3Dom dom = (Xpp3Dom) model.getConfiguration();
        Xpp3Dom javahome = dom != null ? dom.getChild(JavaToolchainImpl.KEY_JAVAHOME) : null;
        if (javahome == null) {
            throw new MisconfiguredToolchainException(

        configurator = new DefaultBeanConfigurator();
    }

    @AfterEach
    void tearDown() throws Exception {
        configurator = null;
    }

    private Xpp3Dom toConfig(String xml) {
        try {
            return new Xpp3Dom(XmlService.read(new StringReader("<configuration>" + xml + "</configuration>")));
        } catch (XMLStreamException e) {
            throw new IllegalArgumentException(e);
        }
    }

                Xpp3Dom parentDom = (Xpp3Dom) reportPlugin.getConfiguration();

                if (parentDom != null) {
                    for (ReportSet execution : reportPlugin.getReportSets()) {
                        Xpp3Dom childDom = (Xpp3Dom) execution.getConfiguration();
                        childDom = Xpp3Dom.mergeXpp3Dom(childDom, new Xpp3Dom(parentDom));

/**
 * A node pointer factory for JXPath to support <code>Xpp3Dom</code>.
 *
 */
public class Xpp3DomPointerFactory implements NodePointerFactory {

    @Override
    public int getOrder() {
        return 200;
    }

    @Override
    public NodePointer createNodePointer(QName name, Object object, Locale locale) {
        if (object instanceof org.codehaus.plexus.util.xml.Xpp3Dom xpp3Dom) {
            object = xpp3Dom.getDom();

        configurator = new DefaultBeanConfigurator();
    }

    @AfterEach
    void tearDown() throws Exception {
        configurator = null;
    }

    private Xpp3Dom toConfig(String xml) {
        try {
            return new Xpp3Dom(XmlService.read(new StringReader("<configuration>" + xml + "</configuration>")));
        } catch (XMLStreamException e) {
            throw new IllegalArgumentException(e);
        }
    }

 * <a href="https://codehaus-plexus.github.io/plexus-utils/apidocs/org/codehaus/plexus/util/xml/Xpp3DomBuilder.html">Xpp3DomBuilder</a> +
 * <a href="https://codehaus-plexus.github.io/plexus-utils/apidocs/org/codehaus/plexus/util/xml/Xpp3Dom.html">Xpp3Dom</a> for
 * DOM content representation (see <code>&lt;configuration&gt;</code> elements).
 */

        Properties props = new Properties();
        props.put("key", "${env.testKey}");
        Xpp3Dom configurationChild = new Xpp3Dom("jdkHome");
        configurationChild.setValue("${env.testKey}");
        Xpp3Dom configuration = new Xpp3Dom("configuration");
        configuration.addChild(configurationChild);
        ToolchainModel toolchain = new ToolchainModel();

import org.apache.commons.jxpath.ri.model.NodeIterator;
import org.apache.commons.jxpath.ri.model.NodePointer;
import org.apache.maven.api.xml.XmlNode;
import org.codehaus.plexus.util.xml.Xpp3Dom;

/**
 * A node iterator for JXPath to support <code>Xpp3Dom</code>.
 *
 */
class Xpp3DomNodeIterator implements NodeIterator {

    private NodePointer parent;

    private NodeTest test;

    private XmlNode node;

        if (configuration instanceof PlexusConfiguration plexusConfiguration) {
            plexusConfig = plexusConfiguration;
        } else if (configuration instanceof Xpp3Dom xpp3Dom) {
            plexusConfig = new XmlPlexusConfiguration(xpp3Dom);
        } else {
            throw new BeanConfigurationException("unsupported bean configuration source ("
                    + configuration.getClass().getName() + ")");
        }