it.unimi.dsi.fastutil.objects

Class ObjectLists

java.lang.Object

it.unimi.dsi.fastutil.objects.ObjectLists

public class ObjectLists
extends Object

A class providing static methods and objects that do useful things with type-specific lists.

See Also:

Collections

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ObjectLists.EmptyList<K> An immutable class representing an empty type-specific list.
static class	ObjectLists.Singleton<K> An immutable class representing a type-specific singleton list.
static class	ObjectLists.SynchronizedList<K> A synchronized wrapper class for lists.
static class	ObjectLists.UnmodifiableList<K> An unmodifiable wrapper class for lists.

Field Summary

Fields

Modifier and Type	Field and Description
static ObjectLists.EmptyList	EMPTY_LIST An empty list (immutable).

Method Summary

Modifier and Type	Method and Description
static <K> ObjectList<K>	shuffle(ObjectList<K> l, Random random) Shuffles the specified list using the specified pseudorandom number generator.
static <K> ObjectList<K>	singleton(K element) Returns a type-specific immutable list containing only the specified element.
static <K> ObjectList<K>	synchronize(ObjectList<K> l) Returns a synchronized type-specific list backed by the given type-specific list.
static <K> ObjectList<K>	synchronize(ObjectList<K> l, Object sync) Returns a synchronized type-specific list backed by the given type-specific list, using an assigned object to synchronize.
static <K> ObjectList<K>	unmodifiable(ObjectList<K> l) Returns an unmodifiable type-specific list backed by the given type-specific list.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EMPTY_LIST

public static final ObjectLists.EmptyList EMPTY_LIST

An empty list (immutable). It is serializable and cloneable.

The class of this objects represent an abstract empty list that is a sublist of any type of list. Thus, EMPTY_LIST may be assigned to a variable of any (sorted) type-specific list.

Method Detail

shuffle

public static <K> ObjectList<K> shuffle(ObjectList<K> l,
                                        Random random)

Shuffles the specified list using the specified pseudorandom number generator.

Parameters:

l - the list to be shuffled.

random - a pseudorandom number generator (please use a XorShift* generator).

Returns:

l.

singleton

public static <K> ObjectList<K> singleton(K element)

Returns a type-specific immutable list containing only the specified element. The returned list is serializable and cloneable.

Parameters:

element - the only element of the returned list.

Returns:

a type-specific immutable list containing just element.

synchronize

public static <K> ObjectList<K> synchronize(ObjectList<K> l)

Returns a synchronized type-specific list backed by the given type-specific list.

Parameters:

l - the list to be wrapped in a synchronized list.

Returns:

a synchronized view of the specified list.

See Also:

Collections.synchronizedList(List)

synchronize

public static <K> ObjectList<K> synchronize(ObjectList<K> l,
                                            Object sync)

Returns a synchronized type-specific list backed by the given type-specific list, using an assigned object to synchronize.

Parameters:

l - the list to be wrapped in a synchronized list.

sync - an object that will be used to synchronize the access to the list.

Returns:

a synchronized view of the specified list.

See Also:

Collections.synchronizedList(List)

unmodifiable

public static <K> ObjectList<K> unmodifiable(ObjectList<K> l)

Returns an unmodifiable type-specific list backed by the given type-specific list.

Parameters:

l - the list to be wrapped in an unmodifiable list.

Returns:

an unmodifiable view of the specified list.

See Also:

Collections.unmodifiableList(List)