@SuppressWarnings("unchecked")
public PriorityBlockingDeque(PriorityDeque<? extends E> c) {
this.lock = new ReentrantLock();
this.notEmpty = lock.newCondition();
this.comparator = (Comparator<? super E>) c.comparator();
initFromPriorityDeque(c);
}
@SuppressWarnings("unchecked")
public PriorityBlockingDeque(Collection<? extends E> c) {
this.lock = new ReentrantLock();
this.notEmpty = lock.newCondition();
if (c instanceof SortedSet<?>) {
SortedSet<? extends E> ss = (SortedSet<? extends E>) c;
this.comparator = (Comparator<? super E>) ss.comparator();
addAll(ss);
} else if (c instanceof PriorityDeque<?>) {
PriorityDeque<? extends E> pq = (PriorityDeque<? extends E>) c;
this.comparator = (Comparator<? super E>) pq.comparator();
initFromPriorityDeque(pq);
} else if (c instanceof PriorityBlockingDeque<?>) {
PriorityBlockingDeque<? extends E> pq = (PriorityBlockingDeque<? extends E>) c;
this.comparator = (Comparator<? super E>) pq.comparator();
initFromPriorityBlockingDeque(pq);
} else {
this.comparator = null;
addAll(c);
}
}