Class CollectionMapper<E,R>

java.lang.Object

java.util.AbstractCollection<R>

org.infinispan.commons.util.CollectionMapper<E,R>

All Implemented Interfaces:

Iterable<R>, Collection<R>

Direct Known Subclasses:

SetMapper, SetMapper, WriteableCacheCollectionMapper

public class CollectionMapper<E,R>
extends AbstractCollection<R>

A collection that maps another one to a new one of a possibly different type. Note this collection is read only and doesn't accept write operations except iterator removal and clear as they don't pertain to the values.

Some operations such as Collection.contains(Object) and Collection.containsAll(Collection) may be more expensive then normal since they cannot utilize lookups into the original collection.

Since:

16.0

Author:

wburns

Field Summary

Fields

Modifier and Type	Field	Description
protected final Function<? super E, ? extends R>	mapper
protected final Collection<E>	realCollection

Constructor Summary

Constructors

Constructor	Description
CollectionMapper(Collection<E> realCollection, Function<? super E, ? extends R> mapper)

Method Summary

Modifier and Type	Method	Description
boolean	add(R e)
boolean	addAll(Collection<? extends R> c)
void	clear()
void	forEach(Consumer<? super R> action)
boolean	isEmpty()
Iterator<R>	iterator()
Stream<R>	parallelStream()
boolean	remove(Object o)
boolean	removeAll(Collection<?> c)
boolean	retainAll(Collection<?> c)
int	size()
Spliterator<R>	spliterator()
Stream<R>	stream()

Methods inherited from class AbstractCollection

contains, containsAll, toArray, toArray, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface Collection

equals, hashCode, removeIf, toArray

Field Details

realCollection

protected final Collection<E> realCollection

mapper

protected final Function<? super E, ? extends R> mapper

Constructor Details

CollectionMapper

public CollectionMapper(Collection<E> realCollection,
 Function<? super E, ? extends R> mapper)

Method Details

size

public int size()

Specified by:

size in interface Collection<E>

Specified by:

size in class AbstractCollection<R>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<E>

Overrides:

isEmpty in class AbstractCollection<R>

iterator

public Iterator<R> iterator()

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in class AbstractCollection<R>

spliterator

public Spliterator<R> spliterator()

stream

public Stream<R> stream()

parallelStream

public Stream<R> parallelStream()

forEach

public void forEach(Consumer<? super R> action)

clear

public void clear()

Specified by:

clear in interface Collection<E>

Overrides:

clear in class AbstractCollection<R>

add

public boolean add(R e)

Specified by:

add in interface Collection<E>

Overrides:

add in class AbstractCollection<R>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<E>

Overrides:

remove in class AbstractCollection<R>

addAll

public boolean addAll(Collection<? extends R> c)

Specified by:

addAll in interface Collection<E>

Overrides:

addAll in class AbstractCollection<R>

removeAll

public boolean removeAll(Collection<?> c)

Specified by:

removeAll in interface Collection<E>

Overrides:

removeAll in class AbstractCollection<R>

retainAll

public boolean retainAll(Collection<?> c)

Specified by:

retainAll in interface Collection<E>

Overrides:

retainAll in class AbstractCollection<R>