Module org.apache.lucene.core

Package org.apache.lucene.search

Class Multiset<T>

java.lang.Object

java.util.AbstractCollection<T>

org.apache.lucene.search.Multiset<T>

All Implemented Interfaces:

Iterable<T>, Collection<T>

public final class Multiset<T>
extends AbstractCollection<T>

A Multiset is a set that allows for duplicate elements. Two Multisets are equal if they contain the same unique elements and if each unique element has as many occurrences in both multisets. Iteration order is not specified.

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<T,Integer>	map
private int	size

Constructor Summary

Constructors

Constructor	Description
Multiset()	Create an empty Multiset.

Method Summary

Modifier and Type	Method	Description
boolean	add(T e)
void	clear()
boolean	contains(Object o)
boolean	equals(Object obj)
int	hashCode()
Iterator<T>	iterator()
boolean	remove(Object o)
int	size()

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, isEmpty, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, spliterator, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Field Details

map

private final Map<T,Integer> map

size

private int size

Constructor Details

Multiset

public Multiset()

Create an empty Multiset.

Method Details

iterator

public Iterator<T> iterator()

Specified by:

iterator in interface Collection<T>

Specified by:

iterator in interface Iterable<T>

Specified by:

iterator in class AbstractCollection<T>

size

public int size()

Specified by:

size in interface Collection<T>

Specified by:

size in class AbstractCollection<T>

clear

public void clear()

Specified by:

clear in interface Collection<T>

Overrides:

clear in class AbstractCollection<T>

add

public boolean add(T e)

Specified by:

add in interface Collection<T>

Overrides:

add in class AbstractCollection<T>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<T>

Overrides:

remove in class AbstractCollection<T>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<T>

Overrides:

contains in class AbstractCollection<T>

equals

public boolean equals(Object obj)

Specified by:

equals in interface Collection<T>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<T>

Overrides:

hashCode in class Object