* @return A {@code DownloadStream} that one of the URI handlers returned,
* null if no {@code DownloadStream} was returned.
*/
public DownloadStream handleURI(URL context, String relativeUri) {
DownloadStream result = null;
if (uriHandlerList != null) {
Object[] handlers;
synchronized (uriHandlerList) {
handlers = uriHandlerList.toArray();
}
for (int i = 0; i < handlers.length; i++) {
final DownloadStream ds = ((URIHandler) handlers[i]).handleURI(
context, relativeUri);
if (ds != null) {
if (result != null) {
throw new RuntimeException("handleURI for " + context
+ " uri: '" + relativeUri