/**
* Finds the prefix for the specified uri.
*
* @param uri namespace uri
* @return prefix, or empty string
*/
public static byte[] prefix(final byte[] uri) {
for (int s = NS.size() - 1; s >= 0; s--) {
if (eq(NS.string(s), uri)) return NS.name(s);
}
return EMPTY;
}
/**
* Finds the specified namespace uri.
*
* @param pref prefix of the namespace
* @return uri, or {@code null}
*/
public static byte[] uri(final byte[] pref) {
for (int s = NS.size() - 1; s >= 0; s--) {
if (eq(NS.name(s), pref)) return NS.string(s);
}
return null;
}