public DataNode find(Path path) {
if (path.isRoot()) {
return rootDataNode;
} else {
DataNode parent = find(path.getParent());
if (parent == null) {
return null;
} else if (parent instanceof DirectoryNode) {
DirectoryNode dirNode = (DirectoryNode) parent;
return dirNode.get(path.getName());
} else {
return null;
}
}
}
