Package net.sf.ehcache.util.concurrent

Class ConcurrentHashMap.KeySetView<K,V>

java.lang.Object

net.sf.ehcache.util.concurrent.ConcurrentHashMap.KeySetView<K,V>

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<K>, java.util.Collection<K>, java.util.Set<K>

Enclosing class:

ConcurrentHashMap<K,V>

public static class ConcurrentHashMap.KeySetView<K,V>
extends java.lang.Object
implements java.util.Set<K>, java.io.Serializable

A view of a ConcurrentHashMap as a Set of keys, in which additions may optionally be enabled by mapping to a common value. This class cannot be directly instantiated. See ConcurrentHashMap.keySet, ConcurrentHashMap.keySet(Object), ConcurrentHashMap.newKeySet(), ConcurrentHashMap.newKeySet(int).

See Also:

Serialized Form

Method Summary

Modifier and Type	Method	Description
boolean	add(K e)
boolean	addAll(java.util.Collection<? extends K> c)
void	clear()
boolean	contains(java.lang.Object o)
boolean	containsAll(java.util.Collection<?> c)
boolean	equals(java.lang.Object o)
ConcurrentHashMap<K,V>	getMap()	Returns the map backing this view.
V	getMappedValue()	Returns the default mapped value for additions, or null if additions are not supported.
int	hashCode()
boolean	isEmpty()
java.util.Iterator<K>	iterator()	Returns a "weakly consistent" iterator that will never throw ConcurrentModificationException, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction.
boolean	remove(java.lang.Object o)
boolean	removeAll(java.util.Collection<?> c)
boolean	retainAll(java.util.Collection<?> c)
int	size()
java.lang.Object[]	toArray()
<T> T[]	toArray(T[] a)
java.lang.String	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, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Set

clear, containsAll, hashCode, isEmpty, removeAll, retainAll, size, spliterator, toArray, toArray

Method Detail

getMappedValue

public V getMappedValue()

Returns the default mapped value for additions, or null if additions are not supported.

Returns:

the default mapped value for additions, or null if not supported.

contains

public boolean contains(java.lang.Object o)

Specified by:

contains in interface java.util.Collection<K>

Specified by:

contains in interface java.util.Set<K>

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection<K>

Specified by:

remove in interface java.util.Set<K>

iterator

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

Returns a "weakly consistent" iterator that will never throw ConcurrentModificationException, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction.

Specified by:

iterator in interface java.util.Collection<K>

Specified by:

iterator in interface java.lang.Iterable<K>

Specified by:

iterator in interface java.util.Set<K>

Returns:

an iterator over the keys of this map

add

public boolean add(K e)

Specified by:

add in interface java.util.Collection<K>

Specified by:

add in interface java.util.Set<K>

addAll

public boolean addAll(java.util.Collection<? extends K> c)

Specified by:

addAll in interface java.util.Collection<K>

Specified by:

addAll in interface java.util.Set<K>

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in interface java.util.Collection<K>

Specified by:

equals in interface java.util.Set<K>

Overrides:

equals in class java.lang.Object

getMap

public ConcurrentHashMap<K,V> getMap()

Returns the map backing this view.

Returns:

the map backing this view

size

public final int size()

isEmpty

public final boolean isEmpty()

clear

public final void clear()

toArray

public final java.lang.Object[] toArray()

toArray

public final <T> T[] toArray(T[] a)

hashCode

public final int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object

containsAll

public final boolean containsAll(java.util.Collection<?> c)

removeAll

public final boolean removeAll(java.util.Collection<?> c)

retainAll

public final boolean retainAll(java.util.Collection<?> c)