public MetadataTreeNode getClasspathAsTree() throws MetadataResolutionException {
        if (classpath == null || classpath.isEmpty()) {
            return null;
        }

        MetadataTreeNode tree = null;
        MetadataTreeNode parent = null;

        for (ArtifactMetadata md : classpath) {
            MetadataTreeNode node = new MetadataTreeNode(md, parent, md.isResolved(), md.getArtifactScope());

    private static int countNodes(MetadataTreeNode tree) {
        if (tree == null) {
            return 0;
        }

        int count = 1;
        MetadataTreeNode[] kids = tree.getChildren();
        if (kids == null || kids.length < 1) {
            return count;
        }
        for (MetadataTreeNode n : kids) {
            count += countNodes(n);
        }