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(

                    + configuration.getClass().getName() + ")");
        }

        if (request.getConfigurationElement() != null) {
            plexusConfig = plexusConfig.getChild(request.getConfigurationElement());
        }

        ClassLoader classLoader = request.getClassLoader();
        if (classLoader == null) {
            classLoader = request.getBean().getClass().getClassLoader();

        for (int i = 0, size = configuration.getChildCount(); i < size; i++) {
            final PlexusConfiguration element = configuration.getChild(i);
            final String propertyName = fromXML(element.getName());
            Class<?> valueType;
            try {
                valueType = getClassForImplementationHint(null, element, loader);

        assertNotNull(md.getMojoConfiguration());
        assertEquals(1, md.getMojoConfiguration().getChildCount());

        PlexusConfiguration pc = md.getMojoConfiguration().getChild(0);

        assertEquals("${jar.finalName}", pc.getValue());
        assertEquals("${project.build.finalName}", pc.getAttribute("default-value"));
        assertEquals("java.lang.String", pc.getAttribute("implementation"));

                result.getEffectiveToolchains().getToolchains().get(0).getConfiguration();
        assertEquals(
                interpolatedValue, toolchainConfiguration.getChild("jdkHome").getValue());
        assertNotNull(result.getProblems());
        assertEquals(0, result.getProblems().size());
    }

    @Test

                session, session.getCurrentProject(), execution, new HashSet<>());
        assertNotNull(execution.getConfiguration());
        assertEquals("1.0", execution.getConfiguration().getChild("version").getAttribute("default-value"));
    }

    @Test
    void testExecutionListeners() throws Exception {
        final File pom = getProject("project-basic");

    @Nonnull
    default List<XmlNode> getChildren() {
        return children();
    }

    @Deprecated(since = "4.0.0", forRemoval = true)
    @Nullable
    default XmlNode getChild(String name) {
        return child(name);
    }

    @Deprecated(since = "4.0.0", forRemoval = true)
    @Nullable
    default Object getInputLocation() {
        return inputLocation();
    }

                    }
                }
                // Children
                for (int i = 0, l = dom.getChildCount(); i < l; i++) {
                    visit(dom.getChild(i));
                }
            }
        }

        private void visit(Extension extension) {
            if (extension != null) {
                String org, val;
                // GroupId

            if (!parameter.isRequired()) {
                continue;
            }

            Object value = null;

            PlexusConfiguration config = configuration.getChild(parameter.getName(), false);
            if (config != null) {
                String expression = config.getValue(null);

                try {
                    value = expressionEvaluator.evaluate(expression);

void Xpp3Dom(Xpp3Dom); public String getName(); public String getValue(); public void setValue(String); public String[] getAttributeNames(); public String getAttribute(String); public void setAttribute(String, String); public Xpp3Dom getChild(int); public Xpp3Dom getChild(String); public void addChild(Xpp3Dom); public Xpp3Dom[] getChildren(); public Xpp3Dom[] getChildren(String); public int getChildCount(); public void removeChild(int); public Xpp3Dom getParent(); public void setParent(Xpp3Dom); public...