org.infinispan.util
Class InfinispanCollections

java.lang.Object
  org.infinispan.util.InfinispanCollections

public class InfinispanCollections
extends Object

Static helpers for Infinispan-specific collections

Since:

4.0

Author:

Manik Surtani

Nested Class Summary

static interface	InfinispanCollections.Function<E,T> A function that converts a type into another one.
static interface	InfinispanCollections.MapMakerFunction<K,V,E> A function that converts an entry into a key/value pair for use in a map.

Field Summary

static BidirectionalMap

EMPTY_BIDI_MAP

Constructor Summary

InfinispanCollections()

Method Summary

static <K,V> BidirectionalMap<K,V>	emptyBidirectionalMap()
static <T> ReversibleOrderedSet<T>	emptyReversibleOrderedSet()
static <K,V,E> Map<K,V>	transformCollectionToMap(Collection<E> input, InfinispanCollections.MapMakerFunction<K,V,E> f) Given a collection, transforms the collection to a map given a InfinispanCollections.MapMakerFunction
static <K,V,E> Map<K,V>	transformMapValue(Map<K,E> input, InfinispanCollections.Function<E,V> f) Given a map of well known key/value types, it makes a shallow copy of it while at the same time transforming it's value type to a desired output type.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_BIDI_MAP

public static final BidirectionalMap EMPTY_BIDI_MAP

Constructor Detail

InfinispanCollections

public InfinispanCollections()

Method Detail

emptyReversibleOrderedSet

public static <T> ReversibleOrderedSet<T> emptyReversibleOrderedSet()

emptyBidirectionalMap

public static <K,V> BidirectionalMap<K,V> emptyBidirectionalMap()

transformMapValue

public static <K,V,E> Map<K,V> transformMapValue(Map<K,E> input,
                                                 InfinispanCollections.Function<E,V> f)

Given a map of well known key/value types, it makes a shallow copy of it while at the same time transforming it's value type to a desired output type. The transformation of the value type is done using a given a function.

Type Parameters:

K - input map's key type

V - desired output type of the map's value

E - input map's value type

Parameters:

input - contains the input key/value pair map

f - function instance to use to transform the value part of the map

Returns:

a shallow copy of the input Map with all its values transformed.

transformCollectionToMap

public static <K,V,E> Map<K,V> transformCollectionToMap(Collection<E> input,
                                                        InfinispanCollections.MapMakerFunction<K,V,E> f)

Given a collection, transforms the collection to a map given a InfinispanCollections.MapMakerFunction

Type Parameters:

K - output map's key type

V - output type of the map's value

E - input collection's entry type

Parameters:

input - contains a collection of type E

f - MapMakerFunction instance to use to transform the collection to a key/value pair

Returns:

a Map with keys and values generated from the input collection