Package org.opendaylight.yangtools.util

Class EmptyDeque<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractQueue<E>

org.opendaylight.yangtools.util.EmptyDeque<E>

Type Parameters:

E - the type of elements held in this collection

All Implemented Interfaces:

Iterable<E>, Collection<E>, Deque<E>, Queue<E>, SequencedCollection<E>, Immutable

public final class EmptyDeque<E>
extends AbstractQueue<E>
implements Deque<E>, Immutable

A specialized always-empty implementation of Deque. This implementation will always refuse new elements in its offer(Object) method.

Method Summary

Modifier and Type	Method	Description
void	addFirst(E e)
void	addLast(E e)
Iterator<E>	descendingIterator()
E	getFirst()
E	getLast()
static <T> EmptyDeque<T>	instance()
Iterator<E>	iterator()
boolean	offer(E e)
boolean	offerFirst(E e)
boolean	offerLast(E e)
E	peek()
E	peekFirst()
E	peekLast()
E	poll()
E	pollFirst()
E	pollLast()
E	pop()
void	push(E e)
E	removeFirst()
boolean	removeFirstOccurrence(Object o)
E	removeLast()
boolean	removeLastOccurrence(Object o)
int	size()
Spliterator<E>	spliterator()
Object[]	toArray()
<T> T[]	toArray(T[] a)

Methods inherited from class java.util.AbstractQueue

add, addAll, clear, element, remove

Methods inherited from class java.util.AbstractCollection

contains, containsAll, isEmpty, remove, removeAll, retainAll, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

clear, containsAll, equals, hashCode, isEmpty, parallelStream, removeAll, removeIf, retainAll, stream, toArray

Methods inherited from interface java.util.Deque

add, addAll, contains, element, remove, remove, reversed

Methods inherited from interface java.lang.Iterable

forEach

Method Details

instance

public static <T> EmptyDeque<T> instance()

offer

public boolean offer(E e)

Specified by:

offer in interface Deque<E>

Specified by:

offer in interface Queue<E>

offerFirst

public boolean offerFirst(E e)

Specified by:

offerFirst in interface Deque<E>

offerLast

public boolean offerLast(E e)

Specified by:

offerLast in interface Deque<E>

poll

public E poll()

Specified by:

poll in interface Deque<E>

Specified by:

poll in interface Queue<E>

pollFirst

public E pollFirst()

Specified by:

pollFirst in interface Deque<E>

pollLast

public E pollLast()

Specified by:

pollLast in interface Deque<E>

peek

public E peek()

Specified by:

peek in interface Deque<E>

Specified by:

peek in interface Queue<E>

peekFirst

public E peekFirst()

Specified by:

peekFirst in interface Deque<E>

peekLast

public E peekLast()

Specified by:

peekLast in interface Deque<E>

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Deque<E>

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in class AbstractCollection<E>

spliterator

public Spliterator<E> spliterator()

Specified by:

spliterator in interface Collection<E>

Specified by:

spliterator in interface Iterable<E>

size

public int size()

Specified by:

size in interface Collection<E>

Specified by:

size in interface Deque<E>

Specified by:

size in class AbstractCollection<E>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<E>

Overrides:

toArray in class AbstractCollection<E>

toArray

public <T> T[] toArray(T[] a)

Specified by:

toArray in interface Collection<E>

Overrides:

toArray in class AbstractCollection<E>

addFirst

public void addFirst(E e)

Specified by:

addFirst in interface Deque<E>

Specified by:

addFirst in interface SequencedCollection<E>

addLast

public void addLast(E e)

Specified by:

addLast in interface Deque<E>

Specified by:

addLast in interface SequencedCollection<E>

removeFirst

public E removeFirst()

Specified by:

removeFirst in interface Deque<E>

Specified by:

removeFirst in interface SequencedCollection<E>

removeLast

public E removeLast()

Specified by:

removeLast in interface Deque<E>

Specified by:

removeLast in interface SequencedCollection<E>

getFirst

public E getFirst()

Specified by:

getFirst in interface Deque<E>

Specified by:

getFirst in interface SequencedCollection<E>

getLast

public E getLast()

Specified by:

getLast in interface Deque<E>

Specified by:

getLast in interface SequencedCollection<E>

removeFirstOccurrence

public boolean removeFirstOccurrence(Object o)

Specified by:

removeFirstOccurrence in interface Deque<E>

removeLastOccurrence

public boolean removeLastOccurrence(Object o)

Specified by:

removeLastOccurrence in interface Deque<E>

push

public void push(E e)

Specified by:

push in interface Deque<E>

pop

public E pop()

Specified by:

pop in interface Deque<E>

descendingIterator

public Iterator<E> descendingIterator()

Specified by:

descendingIterator in interface Deque<E>