com.tangosol.util

Class AbstractKeyBasedMap.KeySet

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<K>

com.tangosol.util.AbstractKeyBasedMap.KeySet

All Implemented Interfaces:

Iterable<K>, Collection<K>, Set<K>

Direct Known Subclasses:

AbstractKeySetBasedMap.KeySet, OpenHashMap.KeySet, PartitionSplittingBackingMap.KeySet

Enclosing class:

AbstractKeyBasedMap<K,V>

protected class AbstractKeyBasedMap.KeySet
extends AbstractSet<K>

A set of keys backed by this map.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	KeySet()

Method Summary

Modifier and Type	Method	Description
void	clear()	Removes all of the elements from this set of Keys by clearing the underlying Map.
boolean	contains(Object o)	Returns true if this collection contains the specified element.
boolean	isEmpty()	Returns true if this Set is empty.
Iterator<K>	iterator()	Returns an iterator over the elements contained in this collection.
boolean	remove(Object o)	Removes the specified element from this Set of keys if it is present by removing the associated key from the underlying Map.
int	size()	Returns the number of elements in this collection.

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

add, addAll, containsAll, 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.Set

add, addAll, containsAll, retainAll, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

KeySet

protected KeySet()

Method Detail

clear

public void clear()

Removes all of the elements from this set of Keys by clearing the underlying Map.

Specified by:

clear in interface Collection<K>

Specified by:

clear in interface Set<K>

Overrides:

clear in class AbstractCollection<K>

contains

public boolean contains(Object o)

Returns true if this collection contains the specified element. More formally, returns true if and only if this collection contains at least one element e such that (o==null ? e==null : o.equals(e)).

Specified by:

contains in interface Collection<K>

Specified by:

contains in interface Set<K>

Overrides:

contains in class AbstractCollection<K>

Parameters:

o - object to be checked for containment in this collection

Returns:

true if this collection contains the specified element

isEmpty

public boolean isEmpty()

Returns true if this Set is empty.

Specified by:

isEmpty in interface Collection<K>

Specified by:

isEmpty in interface Set<K>

Overrides:

isEmpty in class AbstractCollection<K>

Returns:

true if this Set is empty

iterator

public Iterator<K> iterator()

Returns an iterator over the elements contained in this collection.

Specified by:

iterator in interface Iterable<K>

Specified by:

iterator in interface Collection<K>

Specified by:

iterator in interface Set<K>

Specified by:

iterator in class AbstractCollection<K>

Returns:

an iterator over the elements contained in this collection

remove

public boolean remove(Object o)

Removes the specified element from this Set of keys if it is present by removing the associated key from the underlying Map.

Specified by:

remove in interface Collection<K>

Specified by:

remove in interface Set<K>

Overrides:

remove in class AbstractCollection<K>

Parameters:

o - object to be removed from this set, if present

Returns:

true if the set contained the specified element

size

public int size()

Returns the number of elements in this collection.

Specified by:

size in interface Collection<K>

Specified by:

size in interface Set<K>

Specified by:

size in class AbstractCollection<K>

Returns:

the number of elements in this collection