/**
* Returns the root of the tree. Returns <code>null</code> only if the tree has no nodes.
*
* @return the root of the tree
*/
public Object getRoot() {
CatalogDirectory rootDir = null, catDir = this;
while (catDir != null) {
rootDir = catDir;
catDir = catDir.getParent();
}
return rootDir;
}
/** Return an array of catalogs describing the path to the given catalog or catalog directory. */
public Catalog[] getPath(Catalog cat) {
if (cat == null) return null;
List l = new Vector();
CatalogDirectory dir;
if (cat instanceof CatalogDirectory) {
dir = (CatalogDirectory) cat;
} else {
dir = cat.getParent();
l.add(cat);
}
while (dir != null) {
l.add(dir);
dir = dir.getParent();
}
int n = l.size();
Catalog[] ar = new Catalog[n];
for (int i = 0; i < n; i++) ar[n - i - 1] = (Catalog) l.get(i);
return ar;
}
