net.automatalib.commons.smartcollections

Interface SmartDeque<E>

Type Parameters:

E - element class.

All Superinterfaces:

Collection<E>, Iterable<E>, SmartCollection<E>

public interface SmartDeque<E>
extends SmartCollection<E>

A double-ended queue (deque), allowing access, removal and insertion of elements both at the beginning and the end.

Author:

Malte Isberner

Method Summary

Modifier and Type	Method and Description
E	getBack() Retrieves the element at the end of the sequence, or null if the sequence is empty.
ElementReference	getBackReference() Retrieves the reference to the element at the end of the sequence, or null if the sequence is empty.
E	getFront() Retrieves the element at the beginning of the sequence, or null if the sequence is empty.
ElementReference	getFrontReference() Retrieves the reference to the element at the beginning of the sequence, or null if the sequence is empty.
E	popBack() Retrieves and removes the element at the beginning of the sequence.
E	popFront() Retrieves and removes the element at the beginning of the sequence.
ElementReference	pushBack(E element) Adds an element at the end of the sequence.
ElementReference	pushFront(E element) Adds an element at the beginning of the sequence.

Methods inherited from interface net.automatalib.commons.smartcollections.SmartCollection

addAll, addAll, choose, chooseRef, deepClear, find, get, quickClear, referencedAdd, referenceIterator, references, remove, remove, replace

Methods inherited from interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, parallelStream, removeAll, removeIf, retainAll, size, spliterator, stream, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Method Detail

pushFront

ElementReference pushFront(E element)

Adds an element at the beginning of the sequence.

Parameters:

element - the element to be added.

Returns:

the reference to the newly added element.

pushBack

ElementReference pushBack(E element)

Adds an element at the end of the sequence.

Parameters:

element - the element to be added.

Returns:

the reference to the newly added element.

getFront

E getFront()

Retrieves the element at the beginning of the sequence, or null if the sequence is empty.

Returns:

the first element or null.

getBack

E getBack()

Retrieves the element at the end of the sequence, or null if the sequence is empty.

Returns:

the last element or null.

getFrontReference

ElementReference getFrontReference()

Retrieves the reference to the element at the beginning of the sequence, or null if the sequence is empty.

Returns:

reference to the first element or null.

getBackReference

ElementReference getBackReference()

Retrieves the reference to the element at the end of the sequence, or null if the sequence is empty.

Returns:

reference to the last element or null.

popFront

E popFront()

Retrieves and removes the element at the beginning of the sequence. If the sequence is empty, null is returned.

Returns:

the previously first element or null.

popBack

E popBack()

Retrieves and removes the element at the beginning of the sequence. If the sequence is empty, null is returned.

Returns:

the previously first element or null.