}
            return false;
        }
        if (test instanceof NodeTypeTest) {
            switch (((NodeTypeTest) test).getNodeType()) {
                case Compiler.NODE_TYPE_NODE:
                    return true;
                case Compiler.NODE_TYPE_TEXT:
                    return node.getValue() != null;
                default:
                    return false;
            }
        }

        }

        @Override
        public boolean isNull() {
            return false;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }
            CombinationItem that = (CombinationItem) o;

     */
    Optional<PathType> selectPathType(Set<PathType> types, Predicate<PathType> filter, Path path) throws IOException {
        PathType selected = null;
        boolean classes = false;
        boolean modules = false;
        boolean unknown = false;
        for (PathType type : types) {
            if (filter.test(type)) {
                if (JavaPathType.CLASSES.equals(type)) {
                    classes = true;

    private boolean asList = true;

    /** result type - dirty tree */
    private boolean asDirtyTree = false;

    /** result type - resolved tree */
    private boolean asResolvedTree = false;

    /** result type - graph */
    private boolean asGraph = false;

    public MetadataResolutionRequest() {}

    public MetadataResolutionRequest(

        }

        ValueSource modelValueSource1 = new PrefixedObjectValueSource(PROJECT_PREFIXES, model, false);
        ValueSource modelValueSource2 = new ObjectBasedValueSource(model);

        ValueSource basedirValueSource = new PrefixedValueSourceWrapper(
                new AbstractValueSource(false) {

                    public Object getValue(String expression) {

    public boolean include(Artifact artifact) {
        for (ArtifactFilter filter : filters) {
            if (filter.include(artifact)) {
                return true;
            }
        }

        return false;
    }

    public void add(ArtifactFilter artifactFilter) {
        filters.add(artifactFilter);
    }

    @Override
    public int hashCode() {
        int hash = 17;

    /**
     * Starts the visit to the specified dependency node.
     *
     * @param node the dependency node to visit
     * @return <code>true</code> to visit the specified dependency node's children, <code>false</code> to skip the
     *         specified dependency node's children and proceed to its next sibling
     */
    boolean enter(@Nonnull Node node);

    /**
     * Ends the visit to the specified dependency node.

                        rr.getId(),
                        rr.getPolicy(false).isEnabled(),
                        rr.getPolicy(false).getUpdatePolicy(),
                        rr.getPolicy(true).isEnabled(),
                        rr.getPolicy(true).getUpdatePolicy(),
                        rr.getPolicy(false).getChecksumPolicy());

            } catch (Exception e) {

    public static final int DEFAULT_VERTICES = 32;
    public static final int DEFAULT_EDGES = 64;

    // flags to indicate the granularity of vertices
    private boolean versionedVertices = false;
    private boolean scopedVertices = false;
    /**
     * the entry point we started building the graph from
     */
    MetadataGraphVertex entry;

    // graph vertices
    TreeSet<MetadataGraphVertex> vertices;

    /**

    String defaultValue() default "";

    /**
     * is the parameter required?
     * @return <code>true</code> if the Mojo should fail when the parameter cannot be injected
     */
    boolean required() default false;

    /**
     * Specifies that this parameter cannot be configured directly by the user (as in the case of POM-specified