public static Enumeration compoundEnumerations(Enumeration list1, Enumeration list2) {
if (list2 == null || !list2.hasMoreElements()) return list1;
if (list1 == null || !list1.hasMoreElements()) return list2;
Vector compoundResults = new Vector();
while (list1.hasMoreElements()) compoundResults.add(list1.nextElement());
while (list2.hasMoreElements()) {
Object item = list2.nextElement();
if (!compoundResults.contains(item)) // don't add duplicates
compoundResults.add(item);
}
return compoundResults.elements();
}
/** @deprecated */
public Enumeration getConditionalPermissionInfos() {
// could implement our own Enumeration, but we don't care about performance here. Just do
// something simple:
synchronized (lock) {
SecurityRow[] rows = condAdminTable.getRows();
Vector vRows = new Vector(rows.length);
for (int i = 0; i < rows.length; i++) vRows.add(rows[i]);
return vRows.elements();
}
}
/**
* Registers the specified listener with this provider so that it would receive notifications on
* changes of its state or other properties such as its local address and display name.
*
* @param listener the listener to register.
*/
public void addRegistrationStateChangeListener(RegistrationStateChangeListener listener) {
synchronized (registrationStateListeners) {
if (!registrationStateListeners.contains(listener)) registrationStateListeners.add(listener);
}
}