it.unimi.dsi.fastutil.objects

Class ReferenceLists.EmptyList<K>

java.lang.Object

java.util.AbstractCollection<K>

it.unimi.dsi.fastutil.objects.AbstractReferenceCollection<K>

it.unimi.dsi.fastutil.objects.ReferenceCollections.EmptyCollection<K>

it.unimi.dsi.fastutil.objects.ReferenceLists.EmptyList<K>

All Implemented Interfaces:

ObjectIterable<K>, ReferenceCollection<K>, ReferenceList<K>, Serializable, Cloneable, Iterable<K>, Collection<K>, List<K>, RandomAccess

Enclosing class:

ReferenceLists

public static class ReferenceLists.EmptyList<K>
extends ReferenceCollections.EmptyCollection<K>
implements ReferenceList<K>, RandomAccess, Serializable, Cloneable

An immutable class representing an empty type-specific list.

This class may be useful to implement your own in case you subclass a type-specific list.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
void	add(int index, K k)
boolean	addAll(int i, Collection<? extends K> c)
void	addElements(int index, K[] a) Add (hopefully quickly) elements to this type-specific list.
void	addElements(int index, K[] a, int offset, int length) Add (hopefully quickly) elements to this type-specific list.
Object	clone()
boolean	equals(Object o)
K	get(int i)
void	getElements(int from, Object[] a, int offset, int length) Copies (hopefully quickly) elements of this type-specific list into the given array.
int	hashCode()
int	indexOf(Object k)
ObjectListIterator<K>	iterator() Returns a type-specific iterator on the elements of this collection.
int	lastIndexOf(Object k)
ObjectListIterator<K>	listIterator() Returns a type-specific list iterator on the list.
ObjectListIterator<K>	listIterator(int i) Returns a type-specific list iterator on the list starting at a given index.
K	remove(int i)
boolean	remove(Object k)
void	removeElements(int from, int to) Removes (hopefully quickly) elements of this type-specific list.
K	set(int index, K k)
void	setElements(int index, K[] a) Set (hopefully quickly) elements to match the array given.
void	setElements(int index, K[] a, int offset, int length) Set (hopefully quickly) elements to match the array given.
void	setElements(K[] a) Set (hopefully quickly) elements to match the array given.
void	size(int s) Sets the size of this list.
void	sort(Comparator<? super K> comparator)
ReferenceList<K>	subList(int from, int to) Returns a type-specific view of the portion of this list from the index from, inclusive, to the index to, exclusive.
String	toString()
void	unstableSort(Comparator<? super K> comparator) Sorts this list using a sort not assured to be stable.

Methods inherited from class it.unimi.dsi.fastutil.objects.ReferenceCollections.EmptyCollection

addAll, clear, contains, removeAll, retainAll, size, toArray

Methods inherited from class java.util.AbstractCollection

add, containsAll, isEmpty, toArray

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

add, addAll, clear, contains, containsAll, isEmpty, removeAll, replaceAll, retainAll, size, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Method Detail

get

public K get(int i)

Specified by:

get in interface List<K>

remove

public boolean remove(Object k)

Specified by:

remove in interface Collection<K>

Specified by:

remove in interface List<K>

Overrides:

remove in class AbstractCollection<K>

remove

public K remove(int i)

Specified by:

remove in interface List<K>

add

public void add(int index,
                K k)

Specified by:

add in interface List<K>

set

public K set(int index,
             K k)

Specified by:

set in interface List<K>

indexOf

public int indexOf(Object k)

Specified by:

indexOf in interface List<K>

lastIndexOf

public int lastIndexOf(Object k)

Specified by:

lastIndexOf in interface List<K>

addAll

public boolean addAll(int i,
                      Collection<? extends K> c)

Specified by:

addAll in interface List<K>

sort

public void sort(Comparator<? super K> comparator)

Specified by:

sort in interface List<K>

unstableSort

public void unstableSort(Comparator<? super K> comparator)

Description copied from interface: ReferenceList

Sorts this list using a sort not assured to be stable. This differs from List.sort(java.util.Comparator) in that the results are not assured to be stable, but may be a bit faster.

Unless a subclass specifies otherwise, the results of the method if the list is concurrently modified during the sort are unspecified.

Specified by:

unstableSort in interface ReferenceList<K>

listIterator

public ObjectListIterator<K> listIterator()

Description copied from interface: ReferenceList

Returns a type-specific list iterator on the list.

Specified by:

listIterator in interface ReferenceList<K>

Specified by:

listIterator in interface List<K>

See Also:

List.listIterator()

iterator

public ObjectListIterator<K> iterator()

Description copied from interface: ReferenceCollection

Returns a type-specific iterator on the elements of this collection.

Note that this specification strengthens the one given in Iterable.iterator(), which was already strengthened in the corresponding type-specific class, but was weakened by the fact that this interface extends Collection.

Specified by:

iterator in interface ObjectIterable<K>

Specified by:

iterator in interface ReferenceCollection<K>

Specified by:

iterator in interface ReferenceList<K>

Specified by:

iterator in interface Iterable<K>

Specified by:

iterator in interface Collection<K>

Specified by:

iterator in interface List<K>

Overrides:

iterator in class ReferenceCollections.EmptyCollection<K>

Returns:

a type-specific iterator on the elements of this collection.

See Also:

Iterable.iterator()

listIterator

public ObjectListIterator<K> listIterator(int i)

Description copied from interface: ReferenceList

Returns a type-specific list iterator on the list starting at a given index.

Specified by:

listIterator in interface ReferenceList<K>

Specified by:

listIterator in interface List<K>

See Also:

List.listIterator(int)

subList

public ReferenceList<K> subList(int from,
                                int to)

Description copied from interface: ReferenceList

Returns a type-specific view of the portion of this list from the index from, inclusive, to the index to, exclusive.

Note that this specification strengthens the one given in List.subList(int,int).

Specified by:

subList in interface ReferenceList<K>

Specified by:

subList in interface List<K>

See Also:

List.subList(int,int)

getElements

public void getElements(int from,
                        Object[] a,
                        int offset,
                        int length)

Description copied from interface: ReferenceList

Copies (hopefully quickly) elements of this type-specific list into the given array.

Specified by:

getElements in interface ReferenceList<K>

Parameters:

from - the start index (inclusive).

a - the destination array.

offset - the offset into the destination array where to store the first element copied.

length - the number of elements to be copied.

removeElements

public void removeElements(int from,
                           int to)

Description copied from interface: ReferenceList

Removes (hopefully quickly) elements of this type-specific list.

Specified by:

removeElements in interface ReferenceList<K>

Parameters:

from - the start index (inclusive).

to - the end index (exclusive).

addElements

public void addElements(int index,
                        K[] a,
                        int offset,
                        int length)

Description copied from interface: ReferenceList

Add (hopefully quickly) elements to this type-specific list.

Specified by:

addElements in interface ReferenceList<K>

Parameters:

index - the index at which to add elements.

a - the array containing the elements.

offset - the offset of the first element to add.

length - the number of elements to add.

addElements

public void addElements(int index,
                        K[] a)

Description copied from interface: ReferenceList

Add (hopefully quickly) elements to this type-specific list.

Specified by:

addElements in interface ReferenceList<K>

Parameters:

index - the index at which to add elements.

a - the array containing the elements.

setElements

public void setElements(K[] a)

Description copied from interface: ReferenceList

Set (hopefully quickly) elements to match the array given.

Specified by:

setElements in interface ReferenceList<K>

Parameters:

a - the array containing the elements.

setElements

public void setElements(int index,
                        K[] a)

Description copied from interface: ReferenceList

Set (hopefully quickly) elements to match the array given.

Specified by:

setElements in interface ReferenceList<K>

Parameters:

index - the index at which to start setting elements.

a - the array containing the elements.

setElements

public void setElements(int index,
                        K[] a,
                        int offset,
                        int length)

Description copied from interface: ReferenceList

Set (hopefully quickly) elements to match the array given. Sets each in this list to the corresponding elements in the array, as if by

 ListIterator iter = listIterator(index);
 int i = 0;
 while (i < length) {
   iter.next();
   iter.set(a[offset + i++]);
 }
 

However, the exact implementation may be more efficient, taking into account whether random access is faster or not, or at the discretion of subclasses, abuse internals.

Specified by:

setElements in interface ReferenceList<K>

Parameters:

index - the index at which to start setting elements.

a - the array containing the elements

offset - the offset of the first element to add.

length - the number of elements to add.

size

public void size(int s)

Description copied from interface: ReferenceList

Sets the size of this list.

If the specified size is smaller than the current size, the last elements are discarded. Otherwise, they are filled with 0/null/false.

Specified by:

size in interface ReferenceList<K>

Parameters:

s - the new size.

clone

public Object clone()

Overrides:

clone in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<K>

Specified by:

hashCode in interface List<K>

Overrides:

hashCode in class ReferenceCollections.EmptyCollection<K>

equals

public boolean equals(Object o)

Specified by:

equals in interface Collection<K>

Specified by:

equals in interface List<K>

Overrides:

equals in class ReferenceCollections.EmptyCollection<K>

toString

public String toString()

Overrides:

toString in class AbstractReferenceCollection<K>