/** Returns the URLs contained within an RMI registry reference. */
private static String[] getURLs(Reference ref) throws NamingException {
int size = 0; // number of URLs
String[] urls = new String[ref.size()];
Enumeration<RefAddr> addrs = ref.getAll();
while (addrs.hasMoreElements()) {
RefAddr addr = addrs.nextElement();
if ((addr instanceof StringRefAddr) && addr.getType().equals(ADDRESS_TYPE)) {
urls[size++] = (String) addr.getContent();
}
}
if (size == 0) {
throw (new ConfigurationException("Reference contains no valid addresses"));
}
// Trim URL array down to size.
if (size == ref.size()) {
return urls;
}
String[] urls2 = new String[size];
System.arraycopy(urls, 0, urls2, 0, size);
return urls2;
}
/** Returns true if argument is an RMI registry reference. */
private static boolean isRegistryRef(Object obj) {
if (!(obj instanceof Reference)) {
return false;
}
String thisClassName = RegistryContextFactory.class.getName();
Reference ref = (Reference) obj;
return thisClassName.equals(ref.getFactoryClassName());
}