public PersistentDir findOrCreate(File f) throws URISyntaxException {
if (f.equals(new File(getPath()))) return this;
if (f.isFile()) {
throw new IllegalArgumentException("Parameter must be a directory, but was a file!");
}
URI rel = super.getPath().relativize(f.toURI());
String[] segments = rel.toString().split("/");
URI childURI =
new URI(getPath() + (getPath().toString().endsWith("/") ? "" : "/") + segments[0]);
PersistentDir child = (PersistentDir) getChildren().get(childURI);
if (child == null) {
child = new PersistentDir();
child.setPath(childURI);
child.setLastModified(new File(childURI).lastModified());
children.put(childURI, child);
}
return child.findOrCreate(f);
}
