io.netty.util.internal.chmv8

Class ConcurrentHashMapV8.KeySetView<K,V>

java.lang.Object

io.netty.util.internal.chmv8.ConcurrentHashMapV8.CollectionView<K,V,K>

io.netty.util.internal.chmv8.ConcurrentHashMapV8.KeySetView<K,V>

All Implemented Interfaces:

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

Enclosing class:

ConcurrentHashMapV8<K,V>

public static class ConcurrentHashMapV8.KeySetView<K,V>
extends ConcurrentHashMapV8.CollectionView<K,V,K>
implements java.util.Set<K>, java.io.Serializable

A view of a ConcurrentHashMapV8 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 keySet(), keySet(V), newKeySet(), newKeySet(int).

Since:

1.8

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private static long	serialVersionUID
private V	value

Fields inherited from class io.netty.util.internal.chmv8.ConcurrentHashMapV8.CollectionView

map

Constructor Summary

Constructors

Constructor and Description
KeySetView(ConcurrentHashMapV8<K,V> map, V value)

Method Summary

Modifier and Type	Method and Description
boolean	add(K e) Adds the specified key to this set view by mapping the key to the default mapped value in the backing map, if defined.
boolean	addAll(java.util.Collection<? extends K> c) Adds all of the elements in the specified collection to this set, as if by calling add(K) on each one.
boolean	contains(java.lang.Object o)
boolean	equals(java.lang.Object o)
void	forEach(ConcurrentHashMapV8.Action<? super K> action)
V	getMappedValue() Returns the default mapped value for additions, or null if additions are not supported.
int	hashCode()
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) Removes the key from this map view, by removing the key (and its corresponding value) from the backing map.
ConcurrentHashMapV8.ConcurrentHashMapSpliterator<K>	spliterator166()

Methods inherited from class io.netty.util.internal.chmv8.ConcurrentHashMapV8.CollectionView

clear, containsAll, getMap, isEmpty, removeAll, retainAll, size, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

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

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

value

private final V value

Constructor Detail

KeySetView

KeySetView(ConcurrentHashMapV8<K,V> map,
           V value)

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>

Specified by:

contains in class ConcurrentHashMapV8.CollectionView<K,V,K>

Throws:

java.lang.NullPointerException - if the specified key is null

remove

public boolean remove(java.lang.Object o)

Removes the key from this map view, by removing the key (and its corresponding value) from the backing map. This method does nothing if the key is not in the map.

Specified by:

remove in interface java.util.Collection<K>

Specified by:

remove in interface java.util.Set<K>

Specified by:

remove in class ConcurrentHashMapV8.CollectionView<K,V,K>

Parameters:

o - the key to be removed from the backing map

Returns:

true if the backing map contained the specified key

Throws:

java.lang.NullPointerException - if the specified key is null

iterator

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

Description copied from class: ConcurrentHashMapV8.CollectionView

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.lang.Iterable<K>

Specified by:

iterator in interface java.util.Collection<K>

Specified by:

iterator in interface java.util.Set<K>

Specified by:

iterator in class ConcurrentHashMapV8.CollectionView<K,V,K>

Returns:

an iterator over the keys of the backing map

add

public boolean add(K e)

Adds the specified key to this set view by mapping the key to the default mapped value in the backing map, if defined.

Specified by:

add in interface java.util.Collection<K>

Specified by:

add in interface java.util.Set<K>

Parameters:

e - key to be added

Returns:

true if this set changed as a result of the call

Throws:

java.lang.NullPointerException - if the specified key is null

java.lang.UnsupportedOperationException - if no default mapped value for additions was provided

addAll

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

Adds all of the elements in the specified collection to this set, as if by calling add(K) on each one.

Specified by:

addAll in interface java.util.Collection<K>

Specified by:

addAll in interface java.util.Set<K>

Parameters:

c - the elements to be inserted into this set

Returns:

true if this set changed as a result of the call

Throws:

java.lang.NullPointerException - if the collection or any of its elements are null

java.lang.UnsupportedOperationException - if no default mapped value for additions was provided

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Collection<K>

Specified by:

hashCode in interface java.util.Set<K>

Overrides:

hashCode in class java.lang.Object

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

spliterator166

public ConcurrentHashMapV8.ConcurrentHashMapSpliterator<K> spliterator166()

forEach

public void forEach(ConcurrentHashMapV8.Action<? super K> action)