@GwtCompatible public abstract class ForwardingQueue<E> extends ForwardingCollection<E> implements Queue<E>
Warning: The methods of ForwardingQueue forward
indiscriminately to the methods of the delegate. For example,
overriding ForwardingCollection.add(E) alone will not change the behavior of offer(E) which can lead to unexpected behavior. In this case, you should
override offer as well, either providing your own implementation, or
delegating to the provided standardOffer method.
The standard methods are not guaranteed to be thread-safe, even
when all of the methods that they depend on are thread-safe.
| Modifier | Constructor and Description |
|---|---|
protected |
ForwardingQueue()
Constructor for use by subclasses.
|
| Modifier and Type | Method and Description |
|---|---|
protected abstract Queue<E> |
delegate()
Returns the backing delegate instance that methods are forwarded to.
|
E |
element() |
boolean |
offer(E o) |
E |
peek() |
E |
poll() |
E |
remove() |
protected boolean |
standardOffer(E e)
A sensible definition of
offer(E) in terms of ForwardingCollection.add(E). |
protected E |
standardPeek()
|
protected E |
standardPoll()
|
add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, size, standardAddAll, standardClear, standardContains, standardContainsAll, standardIsEmpty, standardRemove, standardRemoveAll, standardRetainAll, standardToArray, standardToArray, standardToString, toArray, toArraytoStringprotected ForwardingQueue()
protected abstract Queue<E> delegate()
ForwardingObjectForwardingSet.delegate(). Concrete subclasses override this method to supply
the instance being decorated.delegate in class ForwardingCollection<E>protected boolean standardOffer(E e)
offer(E) in terms of ForwardingCollection.add(E). If you
override ForwardingCollection.add(E), you may wish to override offer(E) to forward
to this implementation.protected E standardPeek()
peek() in terms of element(). If you
override element(), you may wish to override peek() to
forward to this implementation.Copyright © 2010-2015. All Rights Reserved.