| 823 |
|
} |
| 824 |
|
|
| 825 |
|
final class PriorityQueueSpliterator implements Spliterator<E> { |
| 826 |
– |
/* |
| 827 |
– |
* This is very similar to ArrayList Spliterator, except for |
| 828 |
– |
* extra null checks. |
| 829 |
– |
*/ |
| 826 |
|
private int index; // current index, modified on advance/split |
| 827 |
|
private int fence; // -1 until first use |
| 828 |
|
private int expectedModCount; // initialized when fence set |
| 851 |
|
|
| 852 |
|
@SuppressWarnings("unchecked") |
| 853 |
|
public void forEachRemaining(Consumer<? super E> action) { |
| 858 |
– |
int i, hi, mc; // hoist accesses and checks from loop |
| 859 |
– |
final Object[] a; |
| 854 |
|
if (action == null) |
| 855 |
|
throw new NullPointerException(); |
| 856 |
< |
if ((a = queue) != null) { |
| 857 |
< |
if ((hi = fence) < 0) { |
| 858 |
< |
mc = modCount; |
| 859 |
< |
hi = size; |
| 860 |
< |
} |
| 861 |
< |
else |
| 862 |
< |
mc = expectedModCount; |
| 869 |
< |
if ((i = index) >= 0 && (index = hi) <= a.length) { |
| 870 |
< |
for (E e;; ++i) { |
| 871 |
< |
if (i < hi) { |
| 872 |
< |
if ((e = (E) a[i]) == null) // must be CME |
| 873 |
< |
break; |
| 874 |
< |
action.accept(e); |
| 875 |
< |
} |
| 876 |
< |
else if (modCount != mc) |
| 877 |
< |
break; |
| 878 |
< |
else |
| 879 |
< |
return; |
| 880 |
< |
} |
| 881 |
< |
} |
| 856 |
> |
if (fence < 0) { fence = size; expectedModCount = modCount; } |
| 857 |
> |
final Object[] a = queue; |
| 858 |
> |
int i, hi; E e; |
| 859 |
> |
for (i = index, index = hi = fence; i < hi; i++) { |
| 860 |
> |
if ((e = (E) a[i]) == null) |
| 861 |
> |
break; // must be CME |
| 862 |
> |
action.accept(e); |
| 863 |
|
} |
| 864 |
< |
throw new ConcurrentModificationException(); |
| 864 |
> |
if (modCount != expectedModCount) |
| 865 |
> |
throw new ConcurrentModificationException(); |
| 866 |
|
} |
| 867 |
|
|
| 868 |
+ |
@SuppressWarnings("unchecked") |
| 869 |
|
public boolean tryAdvance(Consumer<? super E> action) { |
| 870 |
|
if (action == null) |
| 871 |
|
throw new NullPointerException(); |
| 872 |
< |
int hi = getFence(), lo = index; |
| 873 |
< |
if (lo >= 0 && lo < hi) { |
| 874 |
< |
index = lo + 1; |
| 875 |
< |
@SuppressWarnings("unchecked") E e = (E)queue[lo]; |
| 876 |
< |
if (e == null) |
| 872 |
> |
if (fence < 0) { fence = size; expectedModCount = modCount; } |
| 873 |
> |
int i; |
| 874 |
> |
if ((i = index) < fence) { |
| 875 |
> |
index = i + 1; |
| 876 |
> |
E e; |
| 877 |
> |
if ((e = (E) queue[i]) == null |
| 878 |
> |
|| modCount != expectedModCount) |
| 879 |
|
throw new ConcurrentModificationException(); |
| 880 |
|
action.accept(e); |
| 896 |
– |
if (modCount != expectedModCount) |
| 897 |
– |
throw new ConcurrentModificationException(); |
| 881 |
|
return true; |
| 882 |
|
} |
| 883 |
|
return false; |
