Beispiel #1
0
 private boolean moveToNext() {
   try {
     Notification<? extends T> nextNotification = observer.takeNext();
     if (nextNotification.isOnNext()) {
       isNextConsumed = false;
       next = nextNotification.getValue();
       return true;
     }
     // If an observable is completed or fails,
     // hasNext() always return false.
     hasNext = false;
     if (nextNotification.isOnCompleted()) {
       return false;
     }
     if (nextNotification.isOnError()) {
       error = nextNotification.getThrowable();
       throw Exceptions.propagate(error);
     }
     throw new IllegalStateException("Should not reach here");
   } catch (InterruptedException e) {
     Thread.currentThread().interrupt();
     error = e;
     throw Exceptions.propagate(error);
   }
 }
Beispiel #2
0
 @Override
 public T next() {
   if (error != null) {
     // If any error has already been thrown, throw it again.
     throw Exceptions.propagate(error);
   }
   if (hasNext()) {
     isNextConsumed = true;
     return next;
   } else {
     throw new NoSuchElementException("No more elements");
   }
 }
Beispiel #3
0
 @Override
 public boolean hasNext() {
   if (error != null) {
     // If any error has already been thrown, throw it again.
     throw Exceptions.propagate(error);
   }
   // Since an iterator should not be used in different thread,
   // so we do not need any synchronization.
   if (hasNext == false) {
     // the iterator has reached the end.
     return false;
   }
   if (isNextConsumed == false) {
     // next has not been used yet.
     return true;
   }
   return moveToNext();
 }