tv.danmaku.ijk.media.drm.util

Class CopyOnWriteMultiset<E>

java.lang.Object

tv.danmaku.ijk.media.drm.util.CopyOnWriteMultiset<E>

Type Parameters:

E - The type of element being stored.

All Implemented Interfaces:

java.lang.Iterable<E>

public final class CopyOnWriteMultiset<E>
extends java.lang.Object
implements java.lang.Iterable<E>

An unordered collection of elements that allows duplicates, but also allows access to a set of unique elements.

This class is thread-safe using the same method as CopyOnWriteArrayList. Mutation methods cause the underlying data to be copied. elementSet() and iterator() return snapshots that are unaffected by subsequent mutations.

Iterating directly on this class reveals duplicate elements. Unique elements can be accessed via elementSet(). Iteration order for both of these is not defined.

Constructor Summary

Constructors

Constructor and Description
CopyOnWriteMultiset()

Method Summary

Modifier and Type	Method and Description
void	add(E element) Adds element to the multiset.
java.util.Set<E>	elementSet() Returns a snapshot of the unique elements currently in this multiset.
java.util.Iterator<E>	iterator() Returns an iterator over a snapshot of all the elements currently in this multiset (including duplicates).
void	remove(E element) Removes element from the multiset.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

CopyOnWriteMultiset

public CopyOnWriteMultiset()

Method Detail

add

public void add(E element)

Adds element to the multiset.

Parameters:

element - The element to be added.

remove

public void remove(E element)

Removes element from the multiset.

Parameters:

element - The element to be removed.

elementSet

public java.util.Set<E> elementSet()

Returns a snapshot of the unique elements currently in this multiset.

Changes to the underlying multiset are not reflected in the returned value.

Returns:

An unmodifiable set containing the unique elements in this multiset.

iterator

public java.util.Iterator<E> iterator()

Returns an iterator over a snapshot of all the elements currently in this multiset (including duplicates).

Changes to the underlying multiset are not reflected in the returned value.

Specified by:

iterator in interface java.lang.Iterable<E>

Returns:

An unmodifiable iterator over all the elements in this multiset (including duplicates).