Xpp3Dom src = (Xpp3Dom) source.getConfiguration();
        if (src != null) {
            Xpp3Dom tgt = (Xpp3Dom) target.getConfiguration();
            if (tgt == null) {
                tgt = Xpp3Dom.mergeXpp3Dom(new Xpp3Dom(src), tgt);
            } else {
                tgt = Xpp3Dom.mergeXpp3Dom(tgt, src);
            }
            target.setConfiguration(tgt);

                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));

        Xpp3Dom configuration = (Xpp3Dom) plugin.getConfiguration();
        if (configuration != null) {
            configuration = new Xpp3Dom(configuration);
            dom.addChild(configuration);
        }

        if (!plugin.getReportSets().isEmpty()) {
            Xpp3Dom reportSets = new Xpp3Dom("reportSets", plugin.getLocation("reportSets"));

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

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

                    executionConfiguration =

        ToolchainModel tm1 = new ToolchainModel();
        tm1.setType("jdk");
        tm1.addProvide("version", "1.5");
        tm1.addProvide("vendor", "sun");
        Xpp3Dom configuration1 = new Xpp3Dom("configuration");
        Xpp3Dom jdkHome1 = new Xpp3Dom("jdkHome");
        jdkHome1.setValue("${env.JAVA_HOME}");
        configuration1.addChild(jdkHome1);
        tm1.setConfiguration(configuration1);

            assertEquals(2, jdks.getToolchains().size());
            Xpp3Dom config0 = (Xpp3Dom) jdks.getToolchains().get(0).getConfiguration();
            assertEquals("lib/tools.jar", config0.getChild("toolsJar").getValue());
            assertEquals(2, config0.getChildCount());
            Xpp3Dom config1 = (Xpp3Dom) jdks.getToolchains().get(1).getConfiguration();
            assertEquals(2, config1.getChildCount());

        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() + ")");
        }

            }

            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(

        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();

        assertNotNull(result);
        assertNotNull(result.getEffectiveModel());
        assertEquals("activated", result.getEffectiveModel().getProperties().get("profile.file"));
        Xpp3Dom conf = (Xpp3Dom)
                result.getEffectiveModel().getBuild().getPlugins().get(0).getConfiguration();
        assertNotNull(conf);
        assertEquals("1.5", conf.getChild("source").getValue());