@Nonnull
    String getNamespaceUri();

    @Nonnull
    String getPrefix();

    @Nullable
    String getValue();

    @Nonnull
    Map<String, String> getAttributes();

    @Nullable
    String getAttribute(@Nonnull String name);

    @Nonnull
    List<XmlNode> getChildren();

    @Nullable
    XmlNode getChild(String name);

    @Nullable
    Object getInputLocation();

                }

                if (parameterConfiguration != null) {
                    Map<String, String> attributes = new HashMap<>(parameterConfiguration.getAttributes());

                    String attributeForImplementation = parameterConfiguration.getAttribute("implementation");
                    String parameterForImplementation = parameter.getImplementation();

        PlexusConfiguration[] ces = c.getChildren();
        if (ces != null) {
            for (PlexusConfiguration ce : ces) {
                String value = ce.getValue(null);
                String defaultValue = ce.getAttribute("default-value", null);
                if (value != null || defaultValue != null) {
                    XmlNodeImpl e = new XmlNodeImpl(
                            ce.getName(),
                            value,

                try {
                    value = expressionEvaluator.evaluate(expression);

                    if (value == null) {
                        value = config.getAttribute("default-value", null);
                    }
                } catch (ExpressionEvaluationException e) {
                    String msg = "Error evaluating the expression '" + expression + "' for configuration value '"

static final String DEFAULT_SELF_COMBINATION_MODE = merge; public void Xpp3Dom(String); public 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...

                } else {
                    result = evaluator.evaluate(value);
                }
            }
            if (null == result && configuration.getChildCount() == 0) {
                value = configuration.getAttribute("default-value");
                if (null != value && !value.isEmpty()) {
                    if (evaluator instanceof TypeAwareExpressionEvaluator) {

org.apache.commons.logging.impl; public final synchronized class Log4jFactory extends org.apache.commons.logging.LogFactory { private java.util.Hashtable attributes; private java.util.Hashtable instances; public void Log4jFactory(); public Object getAttribute(String); public String[] getAttributeNames(); public org.apache.commons.logging.Log getInstance(Class) throws org.apache.commons.logging.LogConfigurationExce; public org.apache.commons.logging.Log getInstance(String) throws org.apache.commons....

org.apache.commons.logging.impl; public final synchronized class Log4jFactory extends org.apache.commons.logging.LogFactory { private java.util.Hashtable attributes; private java.util.Hashtable instances; public void Log4jFactory(); public Object getAttribute(String); public String[] getAttributeNames(); public org.apache.commons.logging.Log getInstance(Class) throws org.apache.commons.logging.LogConfigurationExce; public org.apache.commons.logging.Log getInstance(String) throws org.apache.commons....

                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");
        final MavenSession session = createMavenSession(pom);