/**
* Determines whether one file is the parent of another.
*
* @param ancestor possible parent of <code>descendant</code>
* @param descendant possible child 0f <code>ancestor</code>
* @return return true if ancestor is a parent of descendant
*/
static boolean isParentOf(final File ancestor, File descendant) {
if (ancestor != null) {
if (ancestor.equals(descendant)) {
return false;
}
while (descendant != null && !ancestor.equals(descendant)) {
descendant = descendant.getParentFile();
}
}
return ancestor != null && descendant != null;
}
/**
* Returns <CODE>true</CODE> if the first provided path is under the second path in the file
* system.
*
* @param descendant the descendant candidate path.
* @param path the path.
* @return <CODE>true</CODE> if the first provided path is under the second path in the file
* system; <code>false</code> otherwise or if either of the files are null
*/
static boolean isDescendant(File descendant, File path) {
if (descendant != null && path != null) {
File parent = descendant.getParentFile();
while (parent != null) {
if (path.equals(parent)) {
return true;
}
parent = parent.getParentFile();
}
}
return false;
}