Package com.google.common.collect

Class ForwardingDeque<E>

  • All Implemented Interfaces:
    java.lang.Iterable<E>, java.util.Collection<E>, java.util.Deque<E>, java.util.Queue<E>
    public abstract class ForwardingDeque<E>
extends ForwardingQueue<E>
implements java.util.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.

    Since:
    12.0

    • Constructor Detail

      • ForwardingDeque

        protected ForwardingDeque()
        Constructor for use by subclasses.

    • Method Detail

      • delegate

        protected abstract java.util.Deque<E> delegate()
        Description copied from class: ForwardingObject
        Returns 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.
        Specified by:
        delegate in class ForwardingQueue<E>

      • addFirst

        public void addFirst​(E e)
        Specified by:
        addFirst in interface java.util.Deque<E>

      • addLast

        public void addLast​(E e)
        Specified by:
        addLast in interface java.util.Deque<E>

      • descendingIterator

        public java.util.Iterator<E> descendingIterator()
        Specified by:
        descendingIterator in interface java.util.Deque<E>

      • getFirst

        public E getFirst()
        Specified by:
        getFirst in interface java.util.Deque<E>

      • getLast

        public E getLast()
        Specified by:
        getLast in interface java.util.Deque<E>

      • offerFirst

        public boolean offerFirst​(E e)
        Specified by:
        offerFirst in interface java.util.Deque<E>

      • offerLast

        public boolean offerLast​(E e)
        Specified by:
        offerLast in interface java.util.Deque<E>

      • peekFirst

        public E peekFirst()
        Specified by:
        peekFirst in interface java.util.Deque<E>

      • peekLast

        public E peekLast()
        Specified by:
        peekLast in interface java.util.Deque<E>

      • pollFirst

        public E pollFirst()
        Specified by:
        pollFirst in interface java.util.Deque<E>

      • pollLast

        public E pollLast()
        Specified by:
        pollLast in interface java.util.Deque<E>

      • pop

        public E pop()
        Specified by:
        pop in interface java.util.Deque<E>

      • push

        public void push​(E e)
        Specified by:
        push in interface java.util.Deque<E>

      • removeFirst

        public E removeFirst()
        Specified by:
        removeFirst in interface java.util.Deque<E>

      • removeLast

        public E removeLast()
        Specified by:
        removeLast in interface java.util.Deque<E>

      • removeFirstOccurrence

        public boolean removeFirstOccurrence​(java.lang.Object o)
        Specified by:
        removeFirstOccurrence in interface java.util.Deque<E>

      • removeLastOccurrence

        public boolean removeLastOccurrence​(java.lang.Object o)
        Specified by:
        removeLastOccurrence in interface java.util.Deque<E>