public abstract class ForwardingDeque<E> extends ForwardingQueue<E> implements Deque<E>
A deque which forwards all its method calls to another deque. Subclasses should override one or more methods to modify the behavior of the backing deque as desired per the decorator pattern.
Warning: The methods of ForwardingDeque forward indiscriminately to the methods of the delegate. For example, overriding ForwardingCollection.add(E) alone will not change the behavior of ForwardingQueue.offer(E) which can lead to unexpected behavior. In this case, you should override offer as well.
| Modifier | Constructor and Description |
|---|---|
protected |
ForwardingDeque()
Constructor for use by subclasses.
|
| Modifier and Type | Method and Description |
|---|---|
void |
addFirst(E e) |
void |
addLast(E e) |
protected abstract Deque<E> |
delegate()
Returns the backing delegate instance that methods are forwarded to.
|
Iterator<E> |
descendingIterator() |
E |
getFirst() |
E |
getLast() |
boolean |
offerFirst(E e) |
boolean |
offerLast(E e) |
E |
peekFirst() |
E |
peekLast() |
E |
pollFirst() |
E |
pollLast() |
E |
pop() |
void |
push(E e) |
E |
removeFirst() |
boolean |
removeFirstOccurrence(Object o) |
E |
removeLast() |
boolean |
removeLastOccurrence(Object o) |
element, offer, peek, poll, remove, standardOffer, standardPeek, standardPolladd, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, size, standardAddAll, standardClear, standardContains, standardContainsAll, standardIsEmpty, standardRemove, standardRemoveAll, standardRetainAll, standardToArray, standardToArray, standardToString, toArray, toArraytoStringclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitadd, contains, element, iterator, offer, peek, poll, remove, remove, sizeaddAll, clear, containsAll, equals, hashCode, isEmpty, parallelStream, removeAll, removeIf, retainAll, spliterator, stream, toArray, toArrayprotected abstract Deque<E> delegate()
ForwardingObjectReturns the backing delegate instance that methods are forwarded to. Abstract subclasses generally override this method with an abstract method that has a more specific return type, such as ForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.
delegate in class ForwardingQueue<E>public Iterator<E> descendingIterator()
descendingIterator in interface Deque<E>public boolean offerFirst(E e)
offerFirst in interface Deque<E>public E removeFirst()
removeFirst in interface Deque<E>public E removeLast()
removeLast in interface Deque<E>public boolean removeFirstOccurrence(Object o)
removeFirstOccurrence in interface Deque<E>public boolean removeLastOccurrence(Object o)
removeLastOccurrence in interface Deque<E>