com.tangosol.util
Class AbstractKeyBasedMap.KeySet

java.lang.Object
  java.util.AbstractCollection
      java.util.AbstractSet
          com.tangosol.util.AbstractKeyBasedMap.KeySet

All Implemented Interfaces:

Iterable, Collection, Set

Direct Known Subclasses:

AbstractKeySetBasedMap.KeySet

Enclosing class:

AbstractKeyBasedMap

protected class AbstractKeyBasedMap.KeySet
extends AbstractSet

A set of keys backed by this map.

Constructor Summary

protected

AbstractKeyBasedMap.KeySet()

Method Summary

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	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.
Object[]	toArray() Returns an array containing all of the elements in this collection.
Object[]	toArray(Object[] ao) Returns an array with a runtime type is that of the specified array and that contains all of the 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, toString

Methods inherited from interface java.util.Set

add, addAll, containsAll, retainAll

Constructor Detail

AbstractKeyBasedMap.KeySet

protected AbstractKeyBasedMap.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

Specified by:

clear in interface Set

Overrides:

clear in class AbstractCollection

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

Specified by:

contains in interface Set

Overrides:

contains in class AbstractCollection

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

Specified by:

isEmpty in interface Set

Overrides:

isEmpty in class AbstractCollection

Returns:

true if this Set is empty

iterator

public Iterator iterator()

Returns an iterator over the elements contained in this collection.

Specified by:

iterator in interface Iterable

Specified by:

iterator in interface Collection

Specified by:

iterator in interface Set

Specified by:

iterator in class AbstractCollection

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

Specified by:

remove in interface Set

Overrides:

remove in class AbstractCollection

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

Specified by:

size in interface Set

Specified by:

size in class AbstractCollection

Returns:

the number of elements in this collection

toArray

public Object[] toArray()

Returns an array containing all of the elements in this collection.

Specified by:

toArray in interface Collection

Specified by:

toArray in interface Set

Overrides:

toArray in class AbstractCollection

Returns:

an array containing all of the elements in this collection

toArray

public Object[] toArray(Object[] ao)

Returns an array with a runtime type is that of the specified array and that contains all of the elements in this collection. If the collection fits in the specified array, it is returned therein. Otherwise, a new array is allocated with the runtime type of the specified array and the size of this collection.

If the collection fits in the specified array with room to spare (i.e. the array has more elements than the collection), the element in the array immediately following the end of the collection is set to null. This is useful in determining the length of the collection only if the caller knows that the collection does not contain any null elements.)

Specified by:

toArray in interface Collection

Specified by:

toArray in interface Set

Overrides:

toArray in class AbstractCollection

Parameters:

ao - the array into which the elements of the collection are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose

Returns:

an array containing the elements of the collection

Throws:

ArrayStoreException - if the runtime type of the specified array is not a supertype of the runtime type of every element in this collection