Package org.infinispan.util

Class CacheCollectionMapper<E,R>

java.lang.Object

java.util.AbstractCollection<R>

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

org.infinispan.util.CacheCollectionMapper<E,R>

Type Parameters:

E - Type of elements in collection before transformation

R - Type of elements in collection after transformation

All Implemented Interfaces:

Iterable<R>, Collection<R>, CacheCollection<R>, org.infinispan.commons.util.CloseableIteratorCollection<R>

@Deprecated
public class CacheCollectionMapper<E,R>
extends CollectionMapper<E,R>
implements CacheCollection<R>

Deprecated.

since 9.2.1 It is recommended to use WriteableCacheCollectionMapper instead as it allows for constant time contains and other operations

A CacheCollection that allows for a different set to be mapped as a different instance with values replaced on request. This is useful as a cache collection that is normally lazily evaluated to prevent having to pull all values into memory which can be a lot faster when checking single values and can also prevent out of memory issues.

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:

9.0

Field Summary

Fields

Modifier and Type	Field	Description
protected org.infinispan.commons.util.InjectiveFunction<Object,?>	keyFilterMapper	Deprecated.
protected CacheCollection<E>	realCacheCollection	Deprecated.

Fields inherited from class org.infinispan.util.CollectionMapper

mapper, realCollection

Constructor Summary

Constructors

Constructor	Description
CacheCollectionMapper(CacheCollection<E> realCollection, Function<? super E,? extends R> mapper)	Deprecated. CacheCollection that maps entries to new type that takes a key filter that is Function.identity()
CacheCollectionMapper(CacheCollection<E> realCollection, Function<? super E,? extends R> mapper, org.infinispan.commons.util.InjectiveFunction<Object,?> keyFilterMapper)	Deprecated. CacheCollection that maps entries to new type that takes a provided key filter.

Method Summary

Modifier and Type	Method	Description
org.infinispan.commons.util.CloseableIterator<R>	iterator()	Deprecated.
CacheStream<R>	parallelStream()	Deprecated.
org.infinispan.commons.util.CloseableSpliterator<R>	spliterator()	Deprecated.
CacheStream<R>	stream()	Deprecated.

Methods inherited from class org.infinispan.util.CollectionMapper

add, addAll, clear, forEach, isEmpty, remove, removeAll, retainAll, size

Methods inherited from class java.util.AbstractCollection

contains, containsAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, remove, removeAll, removeIf, retainAll, size, toArray, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Field Detail

realCacheCollection

protected final CacheCollection<E> realCacheCollection

Deprecated.

keyFilterMapper

protected final org.infinispan.commons.util.InjectiveFunction<Object,?> keyFilterMapper

Deprecated.

Constructor Detail

CacheCollectionMapper

public CacheCollectionMapper(CacheCollection<E> realCollection,
                             Function<? super E,? extends R> mapper)

Deprecated.

CacheCollection that maps entries to new type that takes a key filter that is Function.identity()

Parameters:

realCollection - the collection storing original entries

mapper - the mapper to the new type

CacheCollectionMapper

public CacheCollectionMapper(CacheCollection<E> realCollection,
                             Function<? super E,? extends R> mapper,
                             org.infinispan.commons.util.InjectiveFunction<Object,?> keyFilterMapper)

Deprecated.

CacheCollection that maps entries to new type that takes a provided key filter.

Parameters:

realCollection - the collection storing original entries

mapper - the mapper to the new type

keyFilterMapper - the key filter mapper to use (since collection may not be the same type)

Method Detail

spliterator

public org.infinispan.commons.util.CloseableSpliterator<R> spliterator()

Deprecated.

Description copied from interface: org.infinispan.commons.util.CloseableIteratorCollection

This spliterator should be explicitly closed after it has been used. Failure to do so could cause resources to not be freed properly

Specified by:

spliterator in interface org.infinispan.commons.util.CloseableIteratorCollection<E>

Specified by:

spliterator in interface Collection<E>

Specified by:

spliterator in interface Iterable<E>

Overrides:

spliterator in class CollectionMapper<E,R>

iterator

public org.infinispan.commons.util.CloseableIterator<R> iterator()

Deprecated.

Description copied from interface: org.infinispan.commons.util.CloseableIteratorCollection

This iterator should be explicitly closed when iteration upon it is completed. Failure to do so could cause resources to not be freed properly

Specified by:

iterator in interface org.infinispan.commons.util.CloseableIteratorCollection<E>

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Iterable<E>

Overrides:

iterator in class CollectionMapper<E,R>

stream

public CacheStream<R> stream()

Deprecated.

Description copied from interface: org.infinispan.commons.util.CloseableIteratorCollection

This stream should be explicitly closed after it has been used. Failure to do so could cause resources to not be freed properly

Specified by:

stream in interface CacheCollection<E>

Specified by:

stream in interface org.infinispan.commons.util.CloseableIteratorCollection<E>

Specified by:

stream in interface Collection<E>

Overrides:

stream in class CollectionMapper<E,R>

parallelStream

public CacheStream<R> parallelStream()

Deprecated.

Description copied from interface: org.infinispan.commons.util.CloseableIteratorCollection

This stream should be explicitly closed after it has been used. Failure to do so could cause resources to not be freed properly

Specified by:

parallelStream in interface CacheCollection<E>

Specified by:

parallelStream in interface org.infinispan.commons.util.CloseableIteratorCollection<E>

Specified by:

parallelStream in interface Collection<E>

Overrides:

parallelStream in class CollectionMapper<E,R>